alloy_rpc_types_eth/transaction/

request.rs

//! Alloy basic Transaction Request type.

use crate::{transaction::AccessList, BlobTransactionSidecar, Transaction, TransactionTrait};
use alloc::{
    string::{String, ToString},
    vec,
    vec::Vec,
};
use alloy_consensus::{
    error::ValueError, transaction::Recovered, SignableTransaction, TxEip1559, TxEip2930,
    TxEip4844, TxEip4844Variant, TxEip4844WithSidecar, TxEip7702, TxEnvelope, TxLegacy, TxType,
    Typed2718, TypedTransaction,
};
use alloy_eips::eip7702::SignedAuthorization;
use alloy_network_primitives::{TransactionBuilder4844, TransactionBuilder7702};
use alloy_primitives::{Address, Bytes, ChainId, Signature, TxKind, B256, U256};
use core::hash::Hash;

/// Represents _all_ transaction requests to/from RPC.
#[derive(Clone, Debug, Default, PartialEq, Eq, Hash)]
#[cfg_attr(any(test, feature = "arbitrary"), derive(arbitrary::Arbitrary))]
#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
#[cfg_attr(feature = "serde", serde(rename_all = "camelCase"))]
#[doc(alias = "TxRequest")]
pub struct TransactionRequest {
    /// The address of the transaction author.
    #[cfg_attr(feature = "serde", serde(default, skip_serializing_if = "Option::is_none"))]
    pub from: Option<Address>,
    /// The destination address of the transaction.
    #[cfg_attr(feature = "serde", serde(default, skip_serializing_if = "Option::is_none"))]
    pub to: Option<TxKind>,
    /// The legacy gas price.
    #[cfg_attr(
        feature = "serde",
        serde(
            default,
            skip_serializing_if = "Option::is_none",
            with = "alloy_serde::quantity::opt"
        )
    )]
    pub gas_price: Option<u128>,
    /// The max base fee per gas the sender is willing to pay.
    #[cfg_attr(
        feature = "serde",
        serde(
            default,
            skip_serializing_if = "Option::is_none",
            with = "alloy_serde::quantity::opt"
        )
    )]
    pub max_fee_per_gas: Option<u128>,
    /// The max priority fee per gas the sender is willing to pay, also called the miner tip.
    #[cfg_attr(
        feature = "serde",
        serde(
            default,
            skip_serializing_if = "Option::is_none",
            with = "alloy_serde::quantity::opt"
        )
    )]
    pub max_priority_fee_per_gas: Option<u128>,
    /// The max fee per blob gas for EIP-4844 blob transactions.
    #[cfg_attr(
        feature = "serde",
        serde(
            default,
            skip_serializing_if = "Option::is_none",
            with = "alloy_serde::quantity::opt"
        )
    )]
    pub max_fee_per_blob_gas: Option<u128>,
    /// The gas limit for the transaction.
    #[cfg_attr(
        feature = "serde",
        serde(
            default,
            skip_serializing_if = "Option::is_none",
            with = "alloy_serde::quantity::opt"
        )
    )]
    pub gas: Option<u64>,
    /// The value transferred in the transaction, in wei.
    #[cfg_attr(feature = "serde", serde(default, skip_serializing_if = "Option::is_none"))]
    pub value: Option<U256>,
    /// Transaction data.
    #[cfg_attr(feature = "serde", serde(default, flatten))]
    pub input: TransactionInput,
    /// The nonce of the transaction.
    #[cfg_attr(
        feature = "serde",
        serde(
            default,
            skip_serializing_if = "Option::is_none",
            with = "alloy_serde::quantity::opt"
        )
    )]
    pub nonce: Option<u64>,
    /// The chain ID for the transaction.
    #[cfg_attr(
        feature = "serde",
        serde(
            default,
            skip_serializing_if = "Option::is_none",
            with = "alloy_serde::quantity::opt"
        )
    )]
    pub chain_id: Option<ChainId>,
    /// An EIP-2930 access list, which lowers cost for accessing accounts and storages in the list. See [EIP-2930](https://eips.ethereum.org/EIPS/eip-2930) for more information.
    #[cfg_attr(feature = "serde", serde(default, skip_serializing_if = "Option::is_none"))]
    pub access_list: Option<AccessList>,
    /// The EIP-2718 transaction type. See [EIP-2718](https://eips.ethereum.org/EIPS/eip-2718) for more information.
    #[cfg_attr(
        feature = "serde",
        serde(
            default,
            rename = "type",
            skip_serializing_if = "Option::is_none",
            with = "alloy_serde::quantity::opt"
        )
    )]
    #[doc(alias = "tx_type")]
    pub transaction_type: Option<u8>,
    /// Blob versioned hashes for EIP-4844 transactions.
    #[cfg_attr(feature = "serde", serde(default, skip_serializing_if = "Option::is_none"))]
    pub blob_versioned_hashes: Option<Vec<B256>>,
    /// Blob sidecar for EIP-4844 transactions.
    #[cfg_attr(
        feature = "serde",
        serde(default, flatten, skip_serializing_if = "Option::is_none")
    )]
    pub sidecar: Option<BlobTransactionSidecar>,
    /// Authorization list for EIP-7702 transactions.
    #[cfg_attr(feature = "serde", serde(default, skip_serializing_if = "Option::is_none"))]
    pub authorization_list: Option<Vec<SignedAuthorization>>,
}

impl TransactionRequest {
    /// Sets the `from` field in the call to the provided address
    #[inline]
    pub const fn from(mut self, from: Address) -> Self {
        self.from = Some(from);
        self
    }

    /// Initializes the [`TransactionRequest`] with the provided transaction.
    ///
    /// Note: This leaves the `from` field empty.
    pub fn from_transaction<T: TransactionTrait>(tx: T) -> Self {
        let to = Some(tx.to().into());
        let gas = tx.gas_limit();
        let value = tx.value();
        let input = tx.input().clone();
        let nonce = tx.nonce();
        let chain_id = tx.chain_id();
        let access_list = tx.access_list().cloned();
        let max_fee_per_blob_gas = tx.max_fee_per_blob_gas();
        let authorization_list = tx.authorization_list().map(|l| l.to_vec());
        let blob_versioned_hashes = tx.blob_versioned_hashes().map(Vec::from);
        let tx_type = tx.ty();

        // fees depending on the transaction type
        let (gas_price, max_fee_per_gas) = if tx.is_dynamic_fee() {
            (None, Some(tx.max_fee_per_gas()))
        } else {
            (Some(tx.max_fee_per_gas()), None)
        };
        let max_priority_fee_per_gas = tx.max_priority_fee_per_gas();

        Self {
            from: None,
            to,
            gas_price,
            max_fee_per_gas,
            max_priority_fee_per_gas,
            gas: Some(gas),
            value: Some(value),
            input: TransactionInput::new(input),
            nonce: Some(nonce),
            chain_id,
            access_list,
            max_fee_per_blob_gas,
            blob_versioned_hashes,
            transaction_type: Some(tx_type),
            sidecar: None,
            authorization_list,
        }
    }

    /// Initializes the [`TransactionRequest`] with the provided transaction and sender.
    pub fn from_recovered_transaction<T: TransactionTrait>(tx: Recovered<T>) -> Self {
        let (tx, from) = tx.into_parts();
        Self::from_transaction(tx).from(from)
    }

    /// Initializes the [`TransactionRequest`] with the provided transaction and sender.
    pub fn from_transaction_with_sender<T: TransactionTrait>(tx: T, from: Address) -> Self {
        Self::from_transaction(tx).from(from)
    }

    /// Sets the transactions type for the transactions.
    #[doc(alias = "tx_type")]
    pub const fn transaction_type(mut self, transaction_type: u8) -> Self {
        self.transaction_type = Some(transaction_type);
        self
    }

    /// Sets the gas limit for the transaction.
    pub const fn gas_limit(mut self, gas_limit: u64) -> Self {
        self.gas = Some(gas_limit);
        self
    }

    /// Sets the nonce for the transaction.
    pub const fn nonce(mut self, nonce: u64) -> Self {
        self.nonce = Some(nonce);
        self
    }

    /// Sets the gas price for the transaction.
    pub const fn gas_price(mut self, gas_price: u128) -> Self {
        self.gas_price = Some(gas_price);
        self
    }

    /// Sets the maximum fee per gas for the transaction.
    pub const fn max_fee_per_gas(mut self, max_fee_per_gas: u128) -> Self {
        self.max_fee_per_gas = Some(max_fee_per_gas);
        self
    }

    /// Sets the maximum priority fee per gas for the transaction.
    pub const fn max_priority_fee_per_gas(mut self, max_priority_fee_per_gas: u128) -> Self {
        self.max_priority_fee_per_gas = Some(max_priority_fee_per_gas);
        self
    }

    /// Sets the maximum fee per blob gas for the transaction.
    pub const fn max_fee_per_blob_gas(mut self, max_fee_per_blob_gas: u128) -> Self {
        self.max_fee_per_blob_gas = Some(max_fee_per_blob_gas);
        self
    }

    /// Sets the recipient address for the transaction.
    #[inline]
    pub const fn to(mut self, to: Address) -> Self {
        self.to = Some(TxKind::Call(to));
        self
    }

    /// Sets the value (amount) for the transaction.
    pub const fn value(mut self, value: U256) -> Self {
        self.value = Some(value);
        self
    }

    /// Sets the access list for the transaction.
    pub fn access_list(mut self, access_list: AccessList) -> Self {
        self.access_list = Some(access_list);
        self
    }

    /// Sets the input data for the transaction.
    ///
    /// This can be used to set both `input` and the `data` field, because some chains or services
    /// still expect of the deprecated `data` field
    ///
    /// ```
    /// use alloy_rpc_types_eth::{TransactionInput, TransactionRequest};
    /// let req = TransactionRequest::default().input(TransactionInput::both(b"00".into()));
    /// ```
    pub fn input(mut self, input: TransactionInput) -> Self {
        self.input = input;
        self
    }

    /// Ensures that if either `input` or `data` is set, the `input` field contains the value.
    ///
    /// This removes `data` the data field.
    pub fn normalize_input(&mut self) {
        self.input.normalize_input()
    }

    /// Consumes the type and returns it with [`Self::normalize_input`] applied
    pub fn normalized_input(mut self) -> Self {
        self.normalize_input();
        self
    }

    /// Ensures that if either `data` or `input` is set, the `data` field contains the value.
    ///
    /// This removes `input` the data field.
    pub fn normalize_data(&mut self) {
        self.input.normalize_data();
    }

    /// Consumes the type and returns it with [`Self::normalize_data`] applied
    pub fn normalized_data(mut self) -> Self {
        self.normalize_data();
        self
    }

    /// If only one field is set, this also sets the other field by with that value.
    ///
    /// This is a noop if both fields are already set.
    pub fn set_input_and_data(&mut self) {
        self.input.set_both();
    }

    /// Consumes the type and returns it with [`Self::set_input_and_data`] applied.
    pub fn with_input_and_data(mut self) -> Self {
        self.set_input_and_data();
        self
    }

    /// Returns the configured fee cap, if any.
    ///
    /// The returns `gas_price` (legacy) if set or `max_fee_per_gas` (EIP1559)
    #[inline]
    pub fn fee_cap(&self) -> Option<u128> {
        self.gas_price.or(self.max_fee_per_gas)
    }

    /// Returns true if _any_ of the EIP-4844 fields are set:
    /// - blob sidecar
    /// - blob versioned hashes
    /// - max fee per blob gas
    pub const fn has_eip4844_fields(&self) -> bool {
        self.sidecar.is_some()
            || self.blob_versioned_hashes.is_some()
            || self.max_fee_per_blob_gas.is_some()
    }

    /// Returns true if _any_ of the EIP-1559 fee fields are set:
    /// - max fee per gas
    /// - max priority fee per gas
    pub const fn has_eip1559_fields(&self) -> bool {
        self.max_fee_per_gas.is_some() || self.max_priority_fee_per_gas.is_some()
    }

    /// Populate the `blob_versioned_hashes` key, if a sidecar exists. No
    /// effect otherwise.
    pub fn populate_blob_hashes(&mut self) {
        if let Some(sidecar) = self.sidecar.as_ref() {
            self.blob_versioned_hashes = Some(sidecar.versioned_hashes().collect())
        }
    }

    /// Gets invalid fields for all transaction types
    pub fn get_invalid_common_fields(&self) -> Vec<&'static str> {
        let mut errors = vec![];

        if self.nonce.is_none() {
            errors.push("nonce");
        }

        if self.gas.is_none() {
            errors.push("gas_limit");
        }

        errors
    }

    /// Gets invalid fields for EIP-1559 transaction type
    pub fn get_invalid_1559_fields(&self) -> Vec<&'static str> {
        let mut errors = vec![];

        if self.max_priority_fee_per_gas.is_none() {
            errors.push("max_priority_fee_per_gas");
        }

        if self.max_fee_per_gas.is_none() {
            errors.push("max_fee_per_gas");
        }

        errors
    }

    /// Build a legacy transaction.
    ///
    /// Returns an error if required fields are missing.
    /// Use `complete_legacy` to check if the request can be built.
    pub fn build_legacy(self) -> Result<TxLegacy, ValueError<Self>> {
        // Check all required fields first
        let Some(to) = self.to else {
            return Err(ValueError::new(self, "Missing 'to' field for legacy transaction."));
        };
        let Some(nonce) = self.nonce else {
            return Err(ValueError::new(self, "Missing 'nonce' field for legacy transaction."));
        };
        let Some(gas_price) = self.gas_price else {
            return Err(ValueError::new(self, "Missing 'gas_price' for legacy transaction."));
        };
        let Some(gas_limit) = self.gas else {
            return Err(ValueError::new(self, "Missing 'gas_limit' for legacy transaction."));
        };

        Ok(TxLegacy {
            chain_id: self.chain_id,
            nonce,
            gas_price,
            gas_limit,
            to,
            value: self.value.unwrap_or_default(),
            input: self.input.into_input().unwrap_or_default(),
        })
    }

    /// Build an EIP-1559 transaction.
    ///
    /// Returns ane error if required fields are missing. Use `complete_1559` to check if the
    /// request can be built.
    pub fn build_1559(self) -> Result<TxEip1559, ValueError<Self>> {
        let Some(to) = self.to else {
            return Err(ValueError::new(self, "Missing 'to' field for Eip1559 transaction."));
        };
        let Some(nonce) = self.nonce else {
            return Err(ValueError::new(self, "Missing 'nonce' field for Eip1559 transaction."));
        };
        let Some(max_priority_fee_per_gas) = self.max_priority_fee_per_gas else {
            return Err(ValueError::new(
                self,
                "Missing 'max_priority_fee_per_gas' field for Eip1559 transaction.",
            ));
        };
        let Some(max_fee_per_gas) = self.max_fee_per_gas else {
            return Err(ValueError::new(
                self,
                "Missing 'max_fee_per_gas' field for Eip1559 transaction.",
            ));
        };
        let Some(gas_limit) = self.gas else {
            return Err(ValueError::new(
                self,
                "Missing 'gas_limit' field for Eip1559 transaction.",
            ));
        };

        Ok(TxEip1559 {
            chain_id: self.chain_id.unwrap_or(1),
            nonce,
            max_priority_fee_per_gas,
            max_fee_per_gas,
            gas_limit,
            to,
            value: self.value.unwrap_or_default(),
            input: self.input.into_input().unwrap_or_default(),
            access_list: self.access_list.unwrap_or_default(),
        })
    }

    /// Build an EIP-2930 transaction.
    ///
    /// Returns an error if required fields are missing. Use `complete_2930` to check if the
    /// request can be built.
    pub fn build_2930(self) -> Result<TxEip2930, ValueError<Self>> {
        let Some(to) = self.to else {
            return Err(ValueError::new(self, "Missing 'to' field for Eip2930 transaction."));
        };
        let Some(nonce) = self.nonce else {
            return Err(ValueError::new(self, "Missing 'nonce' field for Eip2930 transaction."));
        };
        let Some(gas_price) = self.gas_price else {
            return Err(ValueError::new(
                self,
                "Missing 'gas_price' field for Eip2930 transaction.",
            ));
        };
        let Some(gas_limit) = self.gas else {
            return Err(ValueError::new(
                self,
                "Missing 'gas_limit' field for Eip2930 transaction.",
            ));
        };

        Ok(TxEip2930 {
            chain_id: self.chain_id.unwrap_or(1),
            nonce,
            gas_price,
            gas_limit,
            to,
            value: self.value.unwrap_or_default(),
            input: self.input.into_input().unwrap_or_default(),
            access_list: self.access_list.unwrap_or_default(),
        })
    }

    /// Build an EIP-4844 transaction variant - either with or without sidecar.
    ///
    /// Returns an error if required fields are missing. Use `complete_4844` to check if the
    /// request can be built.
    pub fn build_4844_variant(self) -> Result<TxEip4844Variant, ValueError<Self>> {
        if self.sidecar.is_none() {
            self.build_4844_without_sidecar().map(Into::into)
        } else {
            self.build_4844_with_sidecar().map(Into::into)
        }
    }

    /// Build an EIP-4844 transaction without sidecar.
    ///
    /// Returns an error if required fields are missing. Use `complete_4844` to check if the
    /// request can be built.
    pub fn build_4844_without_sidecar(self) -> Result<TxEip4844, ValueError<Self>> {
        // First check 'to' field and type
        let Some(to) = self.to else {
            return Err(ValueError::new(self, "Missing 'to' field for Eip4844 transaction."));
        };
        let TxKind::Call(to_address) = to else {
            return Err(ValueError::new(
                Self { to: Some(to), ..self },
                "The field `to` can only be of type TxKind::Call(Address). Please change it accordingly.",
            ));
        };

        // Check all required fields exist before extracting
        if self.nonce.is_none() {
            return Err(ValueError::new(self, "Missing 'nonce' field for Eip4844 transaction."));
        }
        if self.gas.is_none() {
            return Err(ValueError::new(
                self,
                "Missing 'gas_limit' field for Eip4844 transaction.",
            ));
        }
        if self.max_fee_per_gas.is_none() {
            return Err(ValueError::new(
                self,
                "Missing 'max_fee_per_gas' field for Eip4844 transaction.",
            ));
        }
        if self.max_priority_fee_per_gas.is_none() {
            return Err(ValueError::new(
                self,
                "Missing 'max_priority_fee_per_gas' field for Eip4844 transaction.",
            ));
        }
        if self.blob_versioned_hashes.is_none() {
            return Err(ValueError::new(
                self,
                "Missing 'blob_versioned_hashes' field for Eip4844 transaction.",
            ));
        }
        if self.max_fee_per_blob_gas.is_none() {
            return Err(ValueError::new(
                self,
                "Missing 'max_fee_per_blob_gas' field for Eip4844 transaction.",
            ));
        }

        // Now extract all fields - safe to unwrap since we checked above
        let nonce = self.nonce.unwrap();
        let gas_limit = self.gas.unwrap();
        let max_fee_per_gas = self.max_fee_per_gas.unwrap();
        let max_priority_fee_per_gas = self.max_priority_fee_per_gas.unwrap();
        let blob_versioned_hashes = self.blob_versioned_hashes.unwrap();
        let max_fee_per_blob_gas = self.max_fee_per_blob_gas.unwrap();

        Ok(TxEip4844 {
            chain_id: self.chain_id.unwrap_or(1),
            nonce,
            gas_limit,
            max_fee_per_gas,
            max_priority_fee_per_gas,
            to: to_address,
            value: self.value.unwrap_or_default(),
            access_list: self.access_list.unwrap_or_default(),
            blob_versioned_hashes,
            max_fee_per_blob_gas,
            input: self.input.into_input().unwrap_or_default(),
        })
    }

    /// Build an EIP-4844 transaction with sidecar.
    ///
    /// Returns an error if required fields are missing. Use `complete_4844` to check if the
    /// request can be built.
    pub fn build_4844_with_sidecar(mut self) -> Result<TxEip4844WithSidecar, ValueError<Self>> {
        self.populate_blob_hashes();

        let Some(sidecar) = self.sidecar.clone() else {
            return Err(ValueError::new(self, "Missing 'sidecar' field for Eip4844 transaction."));
        };

        Ok(TxEip4844WithSidecar { sidecar, tx: self.build_4844_without_sidecar()? })
    }

    /// Build an EIP-7702 transaction.
    ///
    /// # Panics
    ///
    /// If required fields are missing. Use `complete_7702` to check if the
    /// request can be built.
    pub fn build_7702(self) -> Result<TxEip7702, ValueError<Self>> {
        let Some(to) = self.to else {
            return Err(ValueError::new(self, "Missing 'to' field for Eip7702 transaction."));
        };
        let Some(to_address) = to.to().copied() else {
            return Err(ValueError::new(self, "The field `to` can only be of type TxKind::Call(Address). Please change it accordingly."));
        };
        let Some(nonce) = self.nonce else {
            return Err(ValueError::new(self, "Missing 'nonce' field for Eip7702 transaction."));
        };
        let Some(gas_limit) = self.gas else {
            return Err(ValueError::new(
                self,
                "Missing 'gas_limit' field for Eip7702 transaction.",
            ));
        };
        let Some(max_fee_per_gas) = self.max_fee_per_gas else {
            return Err(ValueError::new(
                self,
                "Missing 'max_fee_per_gas' field for Eip7702 transaction.",
            ));
        };
        let Some(max_priority_fee_per_gas) = self.max_priority_fee_per_gas else {
            return Err(ValueError::new(
                self,
                "Missing 'max_priority_fee_per_gas' field for Eip7702 transaction.",
            ));
        };

        Ok(TxEip7702 {
            chain_id: self.chain_id.unwrap_or(1),
            nonce,
            gas_limit,
            max_fee_per_gas,
            max_priority_fee_per_gas,
            to: to_address,
            value: self.value.unwrap_or_default(),
            input: self.input.into_input().unwrap_or_default(),
            access_list: self.access_list.unwrap_or_default(),
            authorization_list: self.authorization_list.unwrap_or_default(),
        })
    }

    /// Ensures `to` field is set to an address which is required by:
    /// - EIP 7702
    /// - EIP 4844
    const fn ensure_mandatory_to(&self) -> Result<(), ()> {
        if !matches!(self.to, Some(TxKind::Call(_))) {
            Err(())
        } else {
            Ok(())
        }
    }

    fn check_reqd_fields(&self) -> Vec<&'static str> {
        let mut missing = Vec::with_capacity(12);
        if self.nonce.is_none() {
            missing.push("nonce");
        }
        if self.gas.is_none() {
            missing.push("gas_limit");
        }
        if self.to.is_none() {
            missing.push("to");
        }
        missing
    }

    fn check_legacy_fields(&self, missing: &mut Vec<&'static str>) {
        if self.gas_price.is_none() {
            missing.push("gas_price");
        }
    }

    fn check_1559_fields(&self, missing: &mut Vec<&'static str>) {
        if self.max_fee_per_gas.is_none() {
            missing.push("max_fee_per_gas");
        }
        if self.max_priority_fee_per_gas.is_none() {
            missing.push("max_priority_fee_per_gas");
        }
    }

    /// Trim field conflicts, based on the preferred type
    ///
    /// This is used to ensure that the request will not be rejected by the
    /// server due to conflicting keys, and should only be called before
    /// submission via rpc.
    pub fn trim_conflicting_keys(&mut self) {
        match self.preferred_type() {
            TxType::Legacy => {
                self.max_fee_per_gas = None;
                self.max_priority_fee_per_gas = None;
                self.max_fee_per_blob_gas = None;
                self.blob_versioned_hashes = None;
                self.sidecar = None;
                self.access_list = None;
                self.authorization_list = None;
            }
            TxType::Eip2930 => {
                self.max_fee_per_gas = None;
                self.max_priority_fee_per_gas = None;
                self.max_fee_per_blob_gas = None;
                self.blob_versioned_hashes = None;
                self.sidecar = None;
                self.authorization_list = None;
            }
            TxType::Eip1559 => {
                self.gas_price = None;
                self.max_fee_per_blob_gas = None;
                self.blob_versioned_hashes = None;
                self.sidecar = None;
                self.authorization_list = None;
            }
            TxType::Eip4844 => {
                self.gas_price = None;
                self.authorization_list = None;
            }
            TxType::Eip7702 => {
                self.gas_price = None;
                self.max_fee_per_blob_gas = None;
                self.blob_versioned_hashes = None;
                self.sidecar = None;
            }
        }
    }

    /// Returns the minimal transaction type this request can be converted into based on the fields
    /// that are set.
    ///
    /// Compared to [`Self::preferred_type`] which is intended for building and eventually signing
    /// transactions and which prefers [`TxType::Eip1559`] if no conflicting fields are set, this
    /// function is intended for deriving the minimal transaction type (legacy).
    ///
    /// [`Self::minimal_tx_type`] is mostly relevant for the server-side, for example executing
    /// `eth_calls` against historic state (pre [`TxType::Eip1559`]) and is used to configure the
    /// EVM's transaction environment with the minimal settings.
    /// Whereas [`Self::preferred_type`] is recommend for using client-side (filling a
    /// [`TransactionRequest`] and signing the transaction [`TransactionRequest::build_typed_tx`]).
    ///
    /// The type is determined in the following order:
    /// - EIP-7702 if authorization_list is set
    /// - EIP-4844 if any EIP-4844 fields are set (sidecar, blob hashes, max blob fee)
    /// - EIP-1559 if any EIP-1559 fee fields are set (max fee per gas, max priority fee)
    /// - EIP-2930 if access_list is set
    /// - Legacy otherwise
    ///
    /// # Examples
    ///
    /// ```rust
    /// use alloy_consensus::TxType;
    /// use alloy_eips::eip2930::AccessList;
    /// use alloy_rpc_types_eth::TransactionRequest;
    ///
    /// // EIP-7702 (highest priority)
    /// let mut request = TransactionRequest::default();
    /// request.authorization_list = Some(vec![]);
    /// assert_eq!(request.minimal_tx_type(), TxType::Eip7702);
    ///
    /// // EIP-4844 with max_fee_per_blob_gas
    /// let request = TransactionRequest::default().max_fee_per_blob_gas(1000000000);
    /// assert_eq!(request.minimal_tx_type(), TxType::Eip4844);
    ///
    /// // EIP-1559 with max_fee_per_gas
    /// let request = TransactionRequest::default().max_fee_per_gas(2000000000);
    /// assert_eq!(request.minimal_tx_type(), TxType::Eip1559);
    ///
    /// // EIP-1559 with max_priority_fee_per_gas
    /// let request = TransactionRequest::default().max_priority_fee_per_gas(1000000000);
    /// assert_eq!(request.minimal_tx_type(), TxType::Eip1559);
    ///
    /// // EIP-2930 with access_list
    /// let request = TransactionRequest::default().access_list(AccessList::default());
    /// assert_eq!(request.minimal_tx_type(), TxType::Eip2930);
    ///
    /// // Legacy (default fallback)
    /// let request = TransactionRequest::default();
    /// assert_eq!(request.minimal_tx_type(), TxType::Legacy);
    ///
    /// // Priority example: EIP-4844 overrides EIP-1559
    /// let mut request = TransactionRequest::default()
    ///     .max_fee_per_gas(2000000000) // EIP-1559 (ignored)
    ///     .max_fee_per_blob_gas(1000000000); // EIP-4844 (takes priority)
    /// assert_eq!(request.minimal_tx_type(), TxType::Eip4844);
    /// ```
    pub const fn minimal_tx_type(&self) -> TxType {
        if self.authorization_list.is_some() {
            TxType::Eip7702
        } else if self.has_eip4844_fields() {
            TxType::Eip4844
        } else if self.has_eip1559_fields() {
            TxType::Eip1559
        } else if self.access_list.is_some() {
            TxType::Eip2930
        } else {
            TxType::Legacy
        }
    }

    /// Check this builder's preferred type, based on the fields that are set.
    ///
    /// This function is intended for building and eventually signing transactions client-side.
    /// Unlike [`Self::minimal_tx_type`] which returns the minimal required type, this function
    /// prefers [`TxType::Eip1559`] when no conflicting fields are set.
    ///
    /// Types are preferred as follows:
    /// - EIP-7702 if authorization_list is set
    /// - EIP-4844 if sidecar or max_blob_fee_per_gas is set
    /// - EIP-2930 if access_list is set
    /// - Legacy if gas_price is set and access_list is unset
    /// - EIP-1559 in all other cases
    ///
    /// # Examples
    ///
    /// ```rust
    /// use alloy_consensus::TxType;
    /// use alloy_eips::eip2930::AccessList;
    /// use alloy_rpc_types_eth::TransactionRequest;
    ///
    /// // EIP-7702 (highest priority)
    /// let mut request = TransactionRequest::default();
    /// request.authorization_list = Some(vec![]);
    /// assert_eq!(request.preferred_type(), TxType::Eip7702);
    ///
    /// // EIP-4844 with max_fee_per_blob_gas
    /// let request = TransactionRequest::default().max_fee_per_blob_gas(1000000000);
    /// assert_eq!(request.preferred_type(), TxType::Eip4844);
    ///
    /// // EIP-2930 with both access_list and gas_price
    /// let request =
    ///     TransactionRequest::default().access_list(AccessList::default()).gas_price(20000000000);
    /// assert_eq!(request.preferred_type(), TxType::Eip2930);
    ///
    /// // Legacy with only gas_price (no access_list)
    /// let request = TransactionRequest::default().gas_price(20000000000);
    /// assert_eq!(request.preferred_type(), TxType::Legacy);
    ///
    /// // EIP-1559 as default for modern transactions
    /// let request = TransactionRequest::default();
    /// assert_eq!(request.preferred_type(), TxType::Eip1559);
    ///
    /// // EIP-1559 even with access_list but no gas_price
    /// let request = TransactionRequest::default().access_list(AccessList::default());
    /// assert_eq!(request.preferred_type(), TxType::Eip1559);
    /// ```
    ///
    /// # Key Differences from [`Self::minimal_tx_type`]
    ///
    /// ```rust
    /// use alloy_consensus::TxType;
    /// use alloy_eips::eip2930::AccessList;
    /// use alloy_rpc_types_eth::TransactionRequest;
    ///
    /// // Empty request - preferred_type prefers EIP-1559, minimal_tx_type falls back to Legacy
    /// let request = TransactionRequest::default();
    /// assert_eq!(request.preferred_type(), TxType::Eip1559); // Preferred for new txs
    /// assert_eq!(request.minimal_tx_type(), TxType::Legacy); // Minimal requirement
    ///
    /// // Access list only - different behavior
    /// let request = TransactionRequest::default().access_list(AccessList::default());
    /// assert_eq!(request.preferred_type(), TxType::Eip1559); // Still prefers EIP-1559
    /// assert_eq!(request.minimal_tx_type(), TxType::Eip2930); // Minimal is EIP-2930
    ///
    /// // Gas price only - both agree on Legacy
    /// let request = TransactionRequest::default().gas_price(20000000000);
    /// assert_eq!(request.preferred_type(), TxType::Legacy);
    /// assert_eq!(request.minimal_tx_type(), TxType::Legacy);
    /// ```
    pub const fn preferred_type(&self) -> TxType {
        if self.authorization_list.is_some() {
            TxType::Eip7702
        } else if self.has_eip4844_fields() {
            TxType::Eip4844
        } else if self.access_list.is_some() && self.gas_price.is_some() {
            TxType::Eip2930
        } else if self.gas_price.is_some() {
            TxType::Legacy
        } else {
            TxType::Eip1559
        }
    }

    /// Check if all necessary keys are present to build a transaction.
    ///
    /// # Returns
    ///
    /// - Ok(type) if all necessary keys are present to build the preferred type.
    /// - Err((type, missing)) if some keys are missing to build the preferred type.
    pub fn missing_keys(&self) -> Result<TxType, (TxType, Vec<&'static str>)> {
        let pref = self.preferred_type();
        if let Err(missing) = match pref {
            TxType::Legacy => self.complete_legacy(),
            TxType::Eip2930 => self.complete_2930(),
            TxType::Eip1559 => self.complete_1559(),
            TxType::Eip4844 => self.complete_4844(),
            TxType::Eip7702 => self.complete_7702(),
        } {
            Err((pref, missing))
        } else {
            Ok(pref)
        }
    }

    /// Check if all necessary keys are present to build a 4844 transaction,
    /// returning a list of keys that are missing.
    ///
    /// **NOTE:** `sidecar` must be present, even if `blob_versioned_hashes` is set.
    pub fn complete_4844(&self) -> Result<(), Vec<&'static str>> {
        let mut missing = self.check_reqd_fields();
        self.check_1559_fields(&mut missing);

        if self.to.is_some() && self.ensure_mandatory_to().is_err() {
            missing.push("to");
        }

        if self.sidecar.is_none() {
            missing.push("sidecar");
        }

        if self.max_fee_per_blob_gas.is_none() {
            missing.push("max_fee_per_blob_gas");
        }

        if missing.is_empty() {
            Ok(())
        } else {
            Err(missing)
        }
    }

    /// Check if all necessary keys are present to build a 1559 transaction,
    /// returning a list of keys that are missing.
    pub fn complete_1559(&self) -> Result<(), Vec<&'static str>> {
        let mut missing = self.check_reqd_fields();
        self.check_1559_fields(&mut missing);
        if missing.is_empty() {
            Ok(())
        } else {
            Err(missing)
        }
    }

    /// Check if all necessary keys are present to build a 2930 transaction,
    /// returning a list of keys that are missing.
    pub fn complete_2930(&self) -> Result<(), Vec<&'static str>> {
        let mut missing = self.check_reqd_fields();
        self.check_legacy_fields(&mut missing);

        if self.access_list.is_none() {
            missing.push("access_list");
        }

        if missing.is_empty() {
            Ok(())
        } else {
            Err(missing)
        }
    }

    /// Check if all necessary keys are present to build a 7702 transaction,
    /// returning a list of keys that are missing.
    pub fn complete_7702(&self) -> Result<(), Vec<&'static str>> {
        let mut missing = self.check_reqd_fields();
        self.check_1559_fields(&mut missing);

        if self.to.is_some() && self.ensure_mandatory_to().is_err() {
            missing.push("to");
        }

        if self.authorization_list.is_none() {
            missing.push("authorization_list");
        }

        if missing.is_empty() {
            Ok(())
        } else {
            Err(missing)
        }
    }

    /// Check if all necessary keys are present to build a legacy transaction,
    /// returning a list of keys that are missing.
    pub fn complete_legacy(&self) -> Result<(), Vec<&'static str>> {
        let mut missing = self.check_reqd_fields();
        self.check_legacy_fields(&mut missing);

        if missing.is_empty() {
            Ok(())
        } else {
            Err(missing)
        }
    }

    /// Return the tx type this request can be built as. Computed by checking
    /// the preferred type, and then checking for completeness.
    pub fn buildable_type(&self) -> Option<TxType> {
        let pref = self.preferred_type();
        match pref {
            TxType::Legacy => self.complete_legacy().ok(),
            TxType::Eip2930 => self.complete_2930().ok(),
            TxType::Eip1559 => self.complete_1559().ok(),
            TxType::Eip4844 => self.complete_4844().ok(),
            TxType::Eip7702 => self.complete_7702().ok(),
        }?;
        Some(pref)
    }

    /// Build a [`TypedTransaction`]
    ///
    /// When `Ok(...)` is returned, the `TypedTransaction` is guaranteed to be _complete_. Which
    /// is to say, that it is signable, and the signed version can be sent to the network.
    pub fn build_typed_tx(self) -> Result<TypedTransaction, Self> {
        let Some(tx_type) = self.buildable_type() else {
            return Err(self);
        };

        Ok(match tx_type {
            TxType::Legacy => self.build_legacy().expect("checked)").into(),
            TxType::Eip2930 => self.build_2930().expect("checked)").into(),
            TxType::Eip1559 => self.build_1559().expect("checked)").into(),
            // `sidecar` is a hard requirement since this must be a _sendable_ transaction.
            TxType::Eip4844 => self.build_4844_with_sidecar().expect("checked)").into(),
            TxType::Eip7702 => self.build_7702().expect("checked)").into(),
        })
    }

    /// Build a [`TypedTransaction`].
    ///
    /// When `Ok(...)` is returned, the `TypedTransaction` is not guaranteed to be _complete_,
    /// only signable.
    ///
    /// E.g. a particular case is when the transaction is of type `Eip4844` and the `sidecar` is not
    /// set, in this case the transaction is not _complete_, i.e. it cannot be sent to the network
    /// once signed. However, it can still be used to calculate the signing hash, signature of
    /// the transaction, and transaction trie hash.
    ///
    /// In case the requirement is to build a _complete_ transaction, use `build_typed_tx` instead.
    pub fn build_consensus_tx(self) -> Result<TypedTransaction, BuildTransactionErr> {
        match self.preferred_type() {
            TxType::Legacy => self.build_legacy().map(Into::into),
            TxType::Eip2930 => self.build_2930().map(Into::into),
            TxType::Eip1559 => self.build_1559().map(Into::into),
            TxType::Eip4844 => self.build_4844_variant().map(Into::into),
            TxType::Eip7702 => self.build_7702().map(Into::into),
        }
        .map_err(|e| {
            let error = e.to_string();
            BuildTransactionErr { tx: e.into_value(), error }
        })
    }

    /// Builds a signed typed transaction envelope for the `eth_simulateV1` endpoint with a dummy
    /// signature. See also <https://github.com/ethereum/execution-apis/pull/484>
    ///
    /// Returns an error if the transaction is not buildable, i.e. if the required fields are
    /// missing. See [`Self::buildable_type`] for more information.
    pub fn build_typed_simulate_transaction(
        self,
    ) -> Result<alloy_consensus::EthereumTxEnvelope<TxEip4844>, ValueError<Self>> {
        let tx = self
            .build_typed_tx()
            .map_err(|req| ValueError::new(req, "Transaction is not buildable"))?;
        let signature = Signature::new(Default::default(), Default::default(), false);
        Ok(tx.into_signed(signature).into())
    }
}

impl TransactionBuilder4844 for TransactionRequest {
    fn max_fee_per_blob_gas(&self) -> Option<u128> {
        self.max_fee_per_blob_gas
    }

    fn set_max_fee_per_blob_gas(&mut self, max_fee_per_blob_gas: u128) {
        self.max_fee_per_blob_gas = Some(max_fee_per_blob_gas)
    }

    fn blob_sidecar(&self) -> Option<&BlobTransactionSidecar> {
        self.sidecar.as_ref()
    }

    fn set_blob_sidecar(&mut self, sidecar: BlobTransactionSidecar) {
        self.sidecar = Some(sidecar);
        self.populate_blob_hashes();
    }
}

impl TransactionBuilder7702 for TransactionRequest {
    fn authorization_list(&self) -> Option<&Vec<SignedAuthorization>> {
        self.authorization_list.as_ref()
    }

    fn set_authorization_list(&mut self, authorization_list: Vec<SignedAuthorization>) {
        self.authorization_list = Some(authorization_list);
    }
}

#[cfg(feature = "serde")]
impl From<TransactionRequest> for alloy_serde::WithOtherFields<TransactionRequest> {
    fn from(tx: TransactionRequest) -> Self {
        Self::new(tx)
    }
}

impl AsRef<Self> for TransactionRequest {
    fn as_ref(&self) -> &Self {
        self
    }
}

impl AsMut<Self> for TransactionRequest {
    fn as_mut(&mut self) -> &mut Self {
        self
    }
}

impl From<Transaction> for TransactionRequest {
    fn from(tx: Transaction) -> Self {
        tx.into_request()
    }
}

impl From<TxLegacy> for TransactionRequest {
    fn from(tx: TxLegacy) -> Self {
        let ty = tx.ty();
        let TxLegacy { chain_id, nonce, gas_price, gas_limit, to, value, input } = tx;
        Self {
            to: if let TxKind::Call(to) = to { Some(to.into()) } else { None },
            gas_price: Some(gas_price),
            gas: Some(gas_limit),
            value: Some(value),
            input: input.into(),
            nonce: Some(nonce),
            chain_id,
            transaction_type: Some(ty),
            ..Default::default()
        }
    }
}

impl From<TxEip2930> for TransactionRequest {
    fn from(tx: TxEip2930) -> Self {
        let ty = tx.ty();
        let TxEip2930 { chain_id, nonce, gas_price, gas_limit, to, value, access_list, input } = tx;
        Self {
            to: if let TxKind::Call(to) = to { Some(to.into()) } else { None },
            gas_price: Some(gas_price),
            gas: Some(gas_limit),
            value: Some(value),
            input: input.into(),
            nonce: Some(nonce),
            chain_id: Some(chain_id),
            access_list: Some(access_list),
            transaction_type: Some(ty),
            ..Default::default()
        }
    }
}

impl From<TxEip1559> for TransactionRequest {
    fn from(tx: TxEip1559) -> Self {
        let ty = tx.ty();
        let TxEip1559 {
            chain_id,
            nonce,
            gas_limit,
            max_fee_per_gas,
            max_priority_fee_per_gas,
            to,
            value,
            access_list,
            input,
        } = tx;
        Self {
            to: if let TxKind::Call(to) = to { Some(to.into()) } else { None },
            max_fee_per_gas: Some(max_fee_per_gas),
            max_priority_fee_per_gas: Some(max_priority_fee_per_gas),
            gas: Some(gas_limit),
            value: Some(value),
            input: input.into(),
            nonce: Some(nonce),
            chain_id: Some(chain_id),
            access_list: Some(access_list),
            transaction_type: Some(ty),
            ..Default::default()
        }
    }
}

impl From<TxEip4844> for TransactionRequest {
    fn from(tx: TxEip4844) -> Self {
        let ty = tx.ty();
        let TxEip4844 {
            chain_id,
            nonce,
            gas_limit,
            max_fee_per_gas,
            max_priority_fee_per_gas,
            to,
            value,
            access_list,
            blob_versioned_hashes,
            max_fee_per_blob_gas,
            input,
        } = tx;
        Self {
            to: Some(to.into()),
            max_fee_per_blob_gas: Some(max_fee_per_blob_gas),
            gas: Some(gas_limit),
            max_fee_per_gas: Some(max_fee_per_gas),
            max_priority_fee_per_gas: Some(max_priority_fee_per_gas),
            value: Some(value),
            input: input.into(),
            nonce: Some(nonce),
            chain_id: Some(chain_id),
            access_list: Some(access_list),
            blob_versioned_hashes: Some(blob_versioned_hashes),
            transaction_type: Some(ty),
            ..Default::default()
        }
    }
}

impl From<TxEip4844WithSidecar> for TransactionRequest {
    fn from(tx: TxEip4844WithSidecar) -> Self {
        let TxEip4844WithSidecar { tx, sidecar } = tx;
        let mut tx: Self = tx.into();
        tx.sidecar = Some(sidecar);
        tx
    }
}

impl From<TxEip4844Variant> for TransactionRequest {
    fn from(tx: TxEip4844Variant) -> Self {
        match tx {
            TxEip4844Variant::TxEip4844(tx) => tx.into(),
            TxEip4844Variant::TxEip4844WithSidecar(tx) => tx.into(),
        }
    }
}

impl From<TxEip7702> for TransactionRequest {
    fn from(tx: TxEip7702) -> Self {
        let ty = tx.ty();
        let TxEip7702 {
            chain_id,
            nonce,
            gas_limit,
            max_fee_per_gas,
            max_priority_fee_per_gas,
            to,
            value,
            access_list,
            authorization_list,
            input,
        } = tx;
        Self {
            to: Some(to.into()),
            gas: Some(gas_limit),
            max_fee_per_gas: Some(max_fee_per_gas),
            max_priority_fee_per_gas: Some(max_priority_fee_per_gas),
            value: Some(value),
            input: input.into(),
            nonce: Some(nonce),
            chain_id: Some(chain_id),
            access_list: Some(access_list),
            authorization_list: Some(authorization_list),
            transaction_type: Some(ty),
            ..Default::default()
        }
    }
}

impl From<TypedTransaction> for TransactionRequest {
    fn from(tx: TypedTransaction) -> Self {
        match tx {
            TypedTransaction::Legacy(tx) => tx.into(),
            TypedTransaction::Eip2930(tx) => tx.into(),
            TypedTransaction::Eip1559(tx) => tx.into(),
            TypedTransaction::Eip4844(tx) => tx.into(),
            TypedTransaction::Eip7702(tx) => tx.into(),
        }
    }
}

impl From<TxEnvelope> for TransactionRequest {
    fn from(envelope: TxEnvelope) -> Self {
        match envelope {
            TxEnvelope::Legacy(tx) => {
                #[cfg(feature = "k256")]
                {
                    let from = tx.recover_signer().ok();
                    let tx: Self = tx.strip_signature().into();
                    if let Some(from) = from {
                        tx.from(from)
                    } else {
                        tx
                    }
                }

                #[cfg(not(feature = "k256"))]
                {
                    tx.strip_signature().into()
                }
            }
            TxEnvelope::Eip2930(tx) => {
                #[cfg(feature = "k256")]
                {
                    let from = tx.recover_signer().ok();
                    let tx: Self = tx.strip_signature().into();
                    if let Some(from) = from {
                        tx.from(from)
                    } else {
                        tx
                    }
                }

                #[cfg(not(feature = "k256"))]
                {
                    tx.strip_signature().into()
                }
            }
            TxEnvelope::Eip1559(tx) => {
                #[cfg(feature = "k256")]
                {
                    let from = tx.recover_signer().ok();
                    let tx: Self = tx.strip_signature().into();
                    if let Some(from) = from {
                        tx.from(from)
                    } else {
                        tx
                    }
                }

                #[cfg(not(feature = "k256"))]
                {
                    tx.strip_signature().into()
                }
            }
            TxEnvelope::Eip4844(tx) => {
                #[cfg(feature = "k256")]
                {
                    let from = tx.recover_signer().ok();
                    let tx: Self = tx.strip_signature().into();
                    if let Some(from) = from {
                        tx.from(from)
                    } else {
                        tx
                    }
                }

                #[cfg(not(feature = "k256"))]
                {
                    tx.strip_signature().into()
                }
            }
            TxEnvelope::Eip7702(tx) => {
                #[cfg(feature = "k256")]
                {
                    let from = tx.recover_signer().ok();
                    let tx: Self = tx.strip_signature().into();
                    if let Some(from) = from {
                        tx.from(from)
                    } else {
                        tx
                    }
                }

                #[cfg(not(feature = "k256"))]
                {
                    tx.strip_signature().into()
                }
            }
        }
    }
}

/// Bincode-compatible [TransactionRequest] serde implementation.
#[cfg(all(feature = "serde", feature = "serde-bincode-compat"))]
pub(super) mod serde_bincode_compat {
    use crate::TransactionInput;
    use alloc::{borrow::Cow, vec::Vec};
    use alloy_consensus::BlobTransactionSidecar;
    use alloy_eips::eip2930::AccessList;
    use alloy_primitives::{Address, Bytes, ChainId, TxKind, B256, U256};
    use serde::{Deserialize, Deserializer, Serialize, Serializer};
    use serde_with::{DeserializeAs, SerializeAs};

    /// Bincode-compatible [super::TransactionRequest] serde implementation.
    ///
    /// Intended to use with the [serde_with::serde_as] macro in the following way:
    /// ```rust
    /// use alloy_rpc_types_eth::{serde_bincode_compat, transaction, TransactionRequest};
    /// use serde::{Deserialize, Serialize};
    /// use serde_with::serde_as;
    ///
    /// #[serde_as]
    /// #[derive(Serialize, Deserialize)]
    /// struct Data {
    ///     #[serde_as(as = "serde_bincode_compat::TransactionRequest")]
    ///     transaction: TransactionRequest,
    /// }
    /// ```
    #[derive(Debug, Serialize, Deserialize)]
    pub struct TransactionRequest<'a> {
        /// The address of the transaction author.
        pub from: Option<Address>,
        /// The destination address of the transaction.
        pub to: Option<TxKind>,
        /// The legacy gas price.
        pub gas_price: Option<u128>,
        /// The max base fee per gas the sender is willing to pay.
        pub max_fee_per_gas: Option<u128>,
        /// The max priority fee per gas the sender is willing to pay, also called the miner tip.
        pub max_priority_fee_per_gas: Option<u128>,
        /// The max fee per blob gas for EIP-4844 blob transactions.
        pub max_fee_per_blob_gas: Option<u128>,
        /// The gas limit for the transaction.
        pub gas: Option<u64>,
        /// The value transferred in the transaction, in wei.
        pub value: Option<U256>,
        /// Transaction input.
        pub input: Option<Cow<'a, Bytes>>,
        /// Transaction data.
        pub data: Option<Cow<'a, Bytes>>,
        /// The nonce of the transaction.
        pub nonce: Option<u64>,
        /// The chain ID for the transaction.
        pub chain_id: Option<ChainId>,
        /// An EIP-2930 access list, which lowers cost for accessing accounts and storages in the list. See [EIP-2930](https://eips.ethereum.org/EIPS/eip-2930) for more information.
        pub access_list: Option<Cow<'a, AccessList>>,
        /// The EIP-2718 transaction type. See [EIP-2718](https://eips.ethereum.org/EIPS/eip-2718) for more information.
        pub transaction_type: Option<u8>,
        /// Blob versioned hashes for EIP-4844 transactions.
        pub blob_versioned_hashes: Option<Cow<'a, Vec<B256>>>,
        /// Blob sidecar for EIP-4844 transactions.
        pub sidecar: Option<Cow<'a, BlobTransactionSidecar>>,
        /// Authorization list for EIP-7702 transactions.
        pub authorization_list:
            Option<Vec<alloy_eips::eip7702::serde_bincode_compat::SignedAuthorization<'a>>>,
    }

    impl<'a> From<&'a super::TransactionRequest> for TransactionRequest<'a> {
        fn from(value: &'a super::TransactionRequest) -> Self {
            Self {
                from: value.from,
                to: value.to,
                gas_price: value.gas_price,
                max_fee_per_gas: value.max_fee_per_gas,
                max_priority_fee_per_gas: value.max_priority_fee_per_gas,
                max_fee_per_blob_gas: value.max_fee_per_blob_gas,
                gas: value.gas,
                value: value.value,
                input: value.input.input.as_ref().map(Cow::Borrowed),
                data: value.input.data.as_ref().map(Cow::Borrowed),
                nonce: value.nonce,
                chain_id: value.chain_id,
                access_list: value.access_list.as_ref().map(Cow::Borrowed),
                transaction_type: value.transaction_type,
                blob_versioned_hashes: value.blob_versioned_hashes.as_ref().map(Cow::Borrowed),
                sidecar: value.sidecar.as_ref().map(Cow::Borrowed),
                authorization_list: value
                    .authorization_list
                    .as_ref()
                    .map(|auths| auths.iter().map(Into::into).collect()),
            }
        }
    }

    impl<'a> From<TransactionRequest<'a>> for super::TransactionRequest {
        fn from(value: TransactionRequest<'a>) -> Self {
            Self {
                from: value.from,
                to: value.to,
                gas_price: value.gas_price,
                max_fee_per_gas: value.max_fee_per_gas,
                max_priority_fee_per_gas: value.max_priority_fee_per_gas,
                max_fee_per_blob_gas: value.max_fee_per_blob_gas,
                gas: value.gas,
                value: value.value,
                input: TransactionInput {
                    input: value.input.map(Cow::into_owned),
                    data: value.data.map(Cow::into_owned),
                },
                nonce: value.nonce,
                chain_id: value.chain_id,
                access_list: value.access_list.map(|list| list.into_owned()),
                transaction_type: value.transaction_type,
                blob_versioned_hashes: value
                    .blob_versioned_hashes
                    .map(|hashes| hashes.into_owned()),
                sidecar: value.sidecar.map(|sidecar| sidecar.into_owned()),
                authorization_list: value
                    .authorization_list
                    .map(|list| list.into_iter().map(Into::into).collect()),
            }
        }
    }

    impl SerializeAs<super::TransactionRequest> for TransactionRequest<'_> {
        fn serialize_as<S>(
            source: &super::TransactionRequest,
            serializer: S,
        ) -> Result<S::Ok, S::Error>
        where
            S: Serializer,
        {
            TransactionRequest::from(source).serialize(serializer)
        }
    }

    impl<'de> DeserializeAs<'de, super::TransactionRequest> for TransactionRequest<'de> {
        fn deserialize_as<D>(deserializer: D) -> Result<super::TransactionRequest, D::Error>
        where
            D: Deserializer<'de>,
        {
            TransactionRequest::deserialize(deserializer).map(Into::into)
        }
    }

    #[cfg(test)]
    mod tests {
        use crate::TransactionRequest;
        use arbitrary::Arbitrary;
        use bincode::config;
        use rand::Rng;
        use serde::{Deserialize, Serialize};
        use serde_with::serde_as;

        use super::super::serde_bincode_compat;

        #[test]
        fn test_tx_request_bincode_roundtrip() {
            #[serde_as]
            #[derive(Debug, PartialEq, Eq, Serialize, Deserialize)]
            struct Data {
                #[serde_as(as = "serde_bincode_compat::TransactionRequest")]
                transaction: TransactionRequest,
            }

            let mut bytes = vec![0u8; 1024];
            rand::thread_rng().fill(bytes.as_mut_slice());
            let data = Data {
                transaction: TransactionRequest::arbitrary(&mut arbitrary::Unstructured::new(
                    &bytes,
                ))
                .unwrap(),
            };

            let encoded = bincode::serde::encode_to_vec(&data, config::legacy()).unwrap();
            let (decoded, _) =
                bincode::serde::decode_from_slice::<Data, _>(&encoded, config::legacy()).unwrap();
            assert_eq!(decoded, data);
        }
    }
}

/// Represents how a [`TransactionRequest`] handles input/data fields.
#[derive(Debug, Clone, Copy, PartialEq, Eq, Default)]
pub enum TransactionInputKind {
    /// Only supports 'input' field
    #[default]
    Input,
    /// Only supports 'data' field
    Data,
    /// Supports both 'input' and 'data' fields
    Both,
}

/// Helper type that supports both `data` and `input` fields that map to transaction input data.
///
/// This is done for compatibility reasons where older implementations used `data` instead of the
/// newer, recommended `input` field.
///
/// If both fields are set, it is expected that they contain the same value, otherwise an error is
/// returned.
#[cfg_attr(any(test, feature = "arbitrary"), derive(arbitrary::Arbitrary))]
#[derive(Clone, Debug, Default, PartialEq, Eq, Hash)]
#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
#[doc(alias = "TxInput")]
pub struct TransactionInput {
    /// Transaction data
    #[cfg_attr(feature = "serde", serde(default, skip_serializing_if = "Option::is_none"))]
    pub input: Option<Bytes>,
    /// Transaction data
    ///
    /// This is the same as `input` but is used for backwards compatibility: <https://github.com/ethereum/go-ethereum/issues/15628>
    #[cfg_attr(feature = "serde", serde(default, skip_serializing_if = "Option::is_none"))]
    pub data: Option<Bytes>,
}

impl TransactionInput {
    /// Creates a new instance with the given input data.
    pub const fn new(data: Bytes) -> Self {
        Self::maybe_input(Some(data))
    }

    /// Creates a new instance with the given input data and sets both `input` and `data` fields to
    /// the same value.
    pub fn both(data: Bytes) -> Self {
        Self::maybe_both(Some(data))
    }

    /// Creates a new instance with the given input data.
    pub const fn maybe_input(input: Option<Bytes>) -> Self {
        Self { input, data: None }
    }

    /// Creates a new instance with the given input data and sets both `input` and `data` fields to
    /// the same value.
    pub fn maybe_both(input: Option<Bytes>) -> Self {
        Self { data: input.clone(), input }
    }

    /// Consumes the type and returns the optional input data.
    #[inline]
    pub fn into_input(self) -> Option<Bytes> {
        self.input.or(self.data)
    }

    /// Ensures that if either `input` or `data` is set, the `input` field contains the value.
    ///
    /// This removes `data` the data field.
    pub fn normalize_input(&mut self) {
        let data = self.data.take();
        // If input is None but data has a value, copy data to input
        if self.input.is_none() && data.is_some() {
            self.input = data;
        }
    }

    /// Consumes the type and returns it with [`Self::normalize_input`] applied
    pub fn normalized_input(mut self) -> Self {
        self.normalize_input();
        self
    }

    /// Ensures that if either `data` or `input` is set, the `data` field contains the value.
    ///
    /// This removes `input` the data field.
    pub fn normalize_data(&mut self) {
        let input = self.input.take();
        if self.data.is_none() && input.is_some() {
            self.data = input;
        }
    }

    /// Consumes the type and returns it with [`Self::normalize_data`] applied
    pub fn normalized_data(mut self) -> Self {
        self.normalize_data();
        self
    }

    /// If only one field is set, this also sets the other field by with that value.
    ///
    /// This is a noop if both fields are already set.
    pub fn set_both(&mut self) {
        if self.input.is_none() {
            self.input = self.data.clone();
        }
        if self.data.is_none() {
            self.data = self.input.clone();
        }
    }

    /// Consumes the type and returns it with [`Self::set_both`] applied.
    pub fn with_both(mut self) -> Self {
        self.set_both();
        self
    }

    /// Consumes the type and returns the optional input data.
    ///
    /// Returns an error if both `data` and `input` fields are set and not equal.
    #[inline]
    pub fn try_into_unique_input(self) -> Result<Option<Bytes>, TransactionInputError> {
        self.check_unique_input().map(|()| self.into_input())
    }

    /// Returns the optional input data.
    #[inline]
    pub fn input(&self) -> Option<&Bytes> {
        self.input.as_ref().or(self.data.as_ref())
    }

    /// Returns the optional input data.
    ///
    /// Returns an error if both `data` and `input` fields are set and not equal.
    #[inline]
    pub fn unique_input(&self) -> Result<Option<&Bytes>, TransactionInputError> {
        self.check_unique_input().map(|()| self.input())
    }

    fn check_unique_input(&self) -> Result<(), TransactionInputError> {
        if let (Some(input), Some(data)) = (&self.input, &self.data) {
            if input != data {
                return Err(TransactionInputError::default());
            }
        }
        Ok(())
    }
}

impl From<Vec<u8>> for TransactionInput {
    fn from(input: Vec<u8>) -> Self {
        Self { input: Some(input.into()), data: None }
    }
}

impl From<Bytes> for TransactionInput {
    fn from(input: Bytes) -> Self {
        Self { input: Some(input), data: None }
    }
}

impl From<Option<Bytes>> for TransactionInput {
    fn from(input: Option<Bytes>) -> Self {
        Self { input, data: None }
    }
}

/// Error thrown when a transaction request cannot be built into a transaction.
#[derive(Debug)]
pub struct BuildTransactionErr<T = TransactionRequest> {
    /// Transaction request that failed to build into a transaction.
    pub tx: T,
    /// Error message.
    pub error: String,
}

/// Error thrown when both `data` and `input` fields are set and not equal.
#[derive(Debug, Default, thiserror::Error)]
#[error("both \"data\" and \"input\" are set and not equal. Please use \"input\" to pass transaction call data")]
#[doc(alias = "TxInputError")]
#[non_exhaustive]
pub struct TransactionInputError;

#[cfg(test)]
mod tests {
    use super::*;
    use crate::Authorization;
    use alloy_primitives::b256;
    #[cfg(feature = "serde")]
    use alloy_serde::WithOtherFields;
    use assert_matches::assert_matches;
    use similar_asserts::assert_eq;

    // <https://github.com/paradigmxyz/reth/issues/6670>
    #[test]
    #[cfg(feature = "serde")]
    fn serde_from_to() {
        let s = r#"{"from":"0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266", "to":"0x70997970C51812dc3A010C7d01b50e0d17dc79C8" }"#;
        let req = serde_json::from_str::<TransactionRequest>(s).unwrap();
        assert!(req.input.check_unique_input().is_ok())
    }

    #[test]
    #[cfg(feature = "serde")]
    fn serde_tx_request() {
        let s = r#"{"accessList":[],"data":"0x0902f1ac","to":"0xa478c2975ab1ea89e8196811f51a7b7ade33eb11","type":"0x02"}"#;
        let _req = serde_json::from_str::<TransactionRequest>(s).unwrap();
    }

    #[test]
    #[cfg(feature = "serde")]
    fn serde_unique_call_input() {
        let s = r#"{"accessList":[],"data":"0x0902f1ac", "input":"0x0902f1ac","to":"0xa478c2975ab1ea89e8196811f51a7b7ade33eb11","type":"0x02"}"#;
        let req = serde_json::from_str::<TransactionRequest>(s).unwrap();
        assert!(req.input.try_into_unique_input().unwrap().is_some());

        let s = r#"{"accessList":[],"data":"0x0902f1ac","to":"0xa478c2975ab1ea89e8196811f51a7b7ade33eb11","type":"0x02"}"#;
        let req = serde_json::from_str::<TransactionRequest>(s).unwrap();
        assert!(req.input.try_into_unique_input().unwrap().is_some());

        let s = r#"{"accessList":[],"input":"0x0902f1ac","to":"0xa478c2975ab1ea89e8196811f51a7b7ade33eb11","type":"0x02"}"#;
        let req = serde_json::from_str::<TransactionRequest>(s).unwrap();
        assert!(req.input.try_into_unique_input().unwrap().is_some());

        let s = r#"{"accessList":[],"data":"0x0902f1ac", "input":"0x0902f1","to":"0xa478c2975ab1ea89e8196811f51a7b7ade33eb11","type":"0x02"}"#;
        let req = serde_json::from_str::<TransactionRequest>(s).unwrap();
        assert!(req.input.try_into_unique_input().is_err());
    }

    #[test]
    #[cfg(feature = "serde")]
    fn serde_tx_request_additional_fields() {
        let s = r#"{"accessList":[],"data":"0x0902f1ac","to":"0xa478c2975ab1ea89e8196811f51a7b7ade33eb11","type":"0x02","sourceHash":"0xbf7e331f7f7c1dd2e05159666b3bf8bc7a8a3a9eb1d518969eab529dd9b88c1a"}"#;
        let req = serde_json::from_str::<WithOtherFields<TransactionRequest>>(s).unwrap();
        assert_eq!(
            req.other.get_deserialized::<B256>("sourceHash").unwrap().unwrap(),
            b256!("bf7e331f7f7c1dd2e05159666b3bf8bc7a8a3a9eb1d518969eab529dd9b88c1a")
        );
    }

    #[test]
    #[cfg(feature = "serde")]
    fn serde_tx_chain_id_field() {
        let chain_id: ChainId = 12345678;

        let chain_id_as_num = format!(r#"{{"chainId": {chain_id} }}"#);
        let req1 = serde_json::from_str::<TransactionRequest>(&chain_id_as_num).unwrap();
        assert_eq!(req1.chain_id.unwrap(), chain_id);

        let chain_id_as_hex = format!(r#"{{"chainId": "0x{chain_id:x}" }}"#);
        let req2 = serde_json::from_str::<TransactionRequest>(&chain_id_as_hex).unwrap();
        assert_eq!(req2.chain_id.unwrap(), chain_id);
    }

    #[test]
    #[cfg(feature = "serde")]
    fn serde_empty() {
        let tx = TransactionRequest::default();
        let serialized = serde_json::to_string(&tx).unwrap();
        assert_eq!(serialized, "{}");
    }

    #[test]
    #[cfg(feature = "serde")]
    fn serde_tx_with_sidecar() {
        // Create a sidecar with some data.
        let s = r#"{
            "to": "0x70997970c51812dc3a010c7d01b50e0d17dc79c8",
            "maxFeePerGas": "0x77359401",
            "maxPriorityFeePerGas": "0x1",
            "maxFeePerBlobGas": "0x77359400",
            "nonce": "0x0",
            "blobVersionedHashes": [
              "0x01b0761f87b081d5cf10757ccc89f12be355c70e2e29df288b65b30710dcbcd1"
            ],
            "blobs": [
              "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000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            ],
            "commitments": [
              "0x000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"
            ],
            "proofs": [
              "0x000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"
            ]
          }
        "#;

        let req = serde_json::from_str::<TransactionRequest>(s).unwrap();

        assert!(req.sidecar.is_some());

        let _serialized = serde_json::to_string_pretty(&req).unwrap();

        let s = r#"{
            "to": "0x70997970c51812dc3a010c7d01b50e0d17dc79c8",
            "maxFeePerGas": "0x77359401",
            "maxPriorityFeePerGas": "0x1",
            "maxFeePerBlobGas": "0x77359400",
            "nonce": "0x0",
            "blobVersionedHashes": [
              "0x01b0761f87b081d5cf10757ccc89f12be355c70e2e29df288b65b30710dcbcd1"
            ],
            "blobs": [
              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            ],
            "commitments": [
              "0x000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"
            ]
          }
        "#; // `proofs` field is missing.

        let req = serde_json::from_str::<TransactionRequest>(s).unwrap();

        assert!(req.sidecar.is_none()); // Sidecar won't be deserialized.
    }

    #[test]
    fn build_consensus_tx_works() {
        // Legacy
        {
            // Positive case
            let legacy_gas_limit = 123456;
            let legacy_request = TransactionRequest {
                to: Some(TxKind::Call(Address::repeat_byte(0xDE))),
                gas_price: Some(1234),
                nonce: Some(57),
                gas: Some(legacy_gas_limit),
                ..Default::default()
            };

            let maybe_legacy_tx: Result<TypedTransaction, _> = legacy_request.build_consensus_tx();
            assert_matches!(maybe_legacy_tx, Ok(TypedTransaction::Legacy(TxLegacy { gas_limit, .. })) if gas_limit == legacy_gas_limit);

            // Negative case
            let legacy_request_missing_gas = TransactionRequest {
                to: Some(TxKind::Call(Address::repeat_byte(0xDE))),
                gas_price: Some(1234),
                nonce: Some(57),
                ..Default::default()
            };
            let maybe_legacy_tx: Result<TypedTransaction, _> =
                legacy_request_missing_gas.build_consensus_tx();
            assert_matches!(maybe_legacy_tx, Err(..));
        }

        // EIP-2930
        {
            // Positive case
            let access_list = AccessList(vec![alloy_eips::eip2930::AccessListItem {
                address: Address::repeat_byte(0x01),
                storage_keys: vec![B256::repeat_byte(0x02), B256::repeat_byte(0x04)],
            }]);
            let eip2930_request = TransactionRequest {
                to: Some(TxKind::Call(Address::repeat_byte(0xDE))),
                gas_price: Some(1234),
                nonce: Some(57),
                gas: Some(123456),
                access_list: Some(access_list.clone()),
                ..Default::default()
            };

            let maybe_eip2930_tx: Result<TypedTransaction, _> =
                eip2930_request.build_consensus_tx();
            assert_matches!(maybe_eip2930_tx, Ok(TypedTransaction::Eip2930(TxEip2930 { access_list, .. })) if access_list == access_list);

            // Negative case
            let eip2930_request_missing_nonce = TransactionRequest {
                to: Some(TxKind::Call(Address::repeat_byte(0xDE))),
                gas_price: Some(1234),
                gas: Some(123456),
                access_list: Some(access_list),
                ..Default::default()
            };

            let maybe_eip2930_tx: Result<TypedTransaction, _> =
                eip2930_request_missing_nonce.build_consensus_tx();
            assert_matches!(maybe_eip2930_tx, Err(..));
        }

        // EIP-1559
        {
            // Positive case
            let max_prio_fee = 987;
            let eip1559_request = TransactionRequest {
                to: Some(TxKind::Call(Address::repeat_byte(0xDE))),
                max_fee_per_gas: Some(1234),
                max_priority_fee_per_gas: Some(max_prio_fee),
                nonce: Some(57),
                gas: Some(123456),
                ..Default::default()
            };

            let maybe_eip1559_tx: Result<TypedTransaction, _> =
                eip1559_request.build_consensus_tx();
            assert_matches!(maybe_eip1559_tx, Ok(TypedTransaction::Eip1559(TxEip1559 { max_priority_fee_per_gas, .. })) if max_priority_fee_per_gas == max_prio_fee);

            // Negative case
            let eip1559_request_missing_max_fee = TransactionRequest {
                to: Some(TxKind::Call(Address::repeat_byte(0xDE))),
                max_priority_fee_per_gas: Some(max_prio_fee),
                nonce: Some(57),
                gas: Some(123456),
                ..Default::default()
            };

            let maybe_eip1559_tx: Result<TypedTransaction, _> =
                eip1559_request_missing_max_fee.build_consensus_tx();
            assert_matches!(maybe_eip1559_tx, Err(..));
        }

        // EIP-4844 without sidecar
        {
            // Positive case
            let max_fee_per_blob_gas = 13579;
            let eip4844_request = TransactionRequest {
                to: Some(TxKind::Call(Address::repeat_byte(0xDE))),
                max_fee_per_gas: Some(1234),
                max_priority_fee_per_gas: Some(678),
                nonce: Some(57),
                gas: Some(123456),
                max_fee_per_blob_gas: Some(max_fee_per_blob_gas),
                blob_versioned_hashes: Some(vec![B256::repeat_byte(0xAB)]),
                ..Default::default()
            };

            let maybe_eip4844_tx: Result<TypedTransaction, _> =
                eip4844_request.build_consensus_tx();
            assert_matches!(maybe_eip4844_tx, Ok(TypedTransaction::Eip4844(TxEip4844Variant::TxEip4844(TxEip4844 { max_fee_per_blob_gas, .. }))) if max_fee_per_blob_gas == max_fee_per_blob_gas);

            // Negative case
            let eip4844_request_incorrect_to = TransactionRequest {
                to: Some(TxKind::Create),
                max_fee_per_gas: Some(1234),
                max_priority_fee_per_gas: Some(678),
                nonce: Some(57),
                gas: Some(123456),
                max_fee_per_blob_gas: Some(max_fee_per_blob_gas),
                blob_versioned_hashes: Some(vec![B256::repeat_byte(0xAB)]),
                ..Default::default()
            };

            let maybe_eip4844_tx: Result<TypedTransaction, _> =
                eip4844_request_incorrect_to.build_consensus_tx();
            assert_matches!(maybe_eip4844_tx, Err(..));
        }

        // EIP-4844 with sidecar
        {
            use alloy_eips::eip4844::{Blob, BlobTransactionSidecar};

            // Positive case
            let sidecar =
                BlobTransactionSidecar::new(vec![Blob::repeat_byte(0xFA)], Vec::new(), Vec::new());
            let eip4844_request = TransactionRequest {
                to: Some(TxKind::Call(Address::repeat_byte(0xDE))),
                max_fee_per_gas: Some(1234),
                max_priority_fee_per_gas: Some(678),
                nonce: Some(57),
                gas: Some(123456),
                max_fee_per_blob_gas: Some(13579),
                blob_versioned_hashes: Some(vec![B256::repeat_byte(0xAB)]),
                sidecar: Some(sidecar),
                ..Default::default()
            };

            let maybe_eip4844_tx: Result<TypedTransaction, _> =
                eip4844_request.build_consensus_tx();
            assert_matches!(maybe_eip4844_tx,
            Ok(TypedTransaction::Eip4844(TxEip4844Variant::TxEip4844WithSidecar(TxEip4844WithSidecar {
            sidecar, .. }))) if sidecar == sidecar);

            // with create to
            let sidecar =
                BlobTransactionSidecar::new(vec![Blob::repeat_byte(0xFA)], Vec::new(), Vec::new());
            let eip4844_request = TransactionRequest {
                to: Some(TxKind::Create),
                max_fee_per_gas: Some(1234),
                max_priority_fee_per_gas: Some(678),
                nonce: Some(57),
                gas: Some(123456),
                max_fee_per_blob_gas: Some(13579),
                blob_versioned_hashes: Some(vec![B256::repeat_byte(0xAB)]),
                sidecar: Some(sidecar.clone()),
                ..Default::default()
            };

            let maybe_eip4844_tx: Result<TypedTransaction, _> =
                eip4844_request.build_consensus_tx();
            assert_matches!(maybe_eip4844_tx, Err(..));

            // Negative case
            let eip4844_request_incorrect_to = TransactionRequest {
                to: Some(TxKind::Create),
                max_fee_per_gas: Some(1234),
                max_priority_fee_per_gas: Some(678),
                nonce: Some(57),
                gas: Some(123456),
                max_fee_per_blob_gas: Some(13579),
                blob_versioned_hashes: Some(vec![B256::repeat_byte(0xAB)]),
                sidecar: Some(sidecar),
                ..Default::default()
            };

            let maybe_eip4844_tx: Result<TypedTransaction, _> =
                eip4844_request_incorrect_to.build_consensus_tx();
            assert_matches!(maybe_eip4844_tx, Err(..));
        }

        // EIP-7702
        {
            let eip4844_request = TransactionRequest {
                to: Some(TxKind::Call(Address::repeat_byte(0xDE))),
                max_fee_per_gas: Some(1234),
                max_priority_fee_per_gas: Some(678),
                nonce: Some(57),
                gas: Some(123456),
                max_fee_per_blob_gas: Some(13579),
                authorization_list: Some(vec![SignedAuthorization::new_unchecked(
                    Authorization {
                        chain_id: Default::default(),
                        address: Default::default(),
                        nonce: 0,
                    },
                    0,
                    U256::ZERO,
                    U256::ZERO,
                )]),
                ..Default::default()
            };

            let maybe_eip4844_tx: Result<TypedTransaction, _> =
                eip4844_request.build_consensus_tx();
            assert_matches!(maybe_eip4844_tx, Ok(TypedTransaction::Eip7702(_)));

            // as create tx
            let eip4844_request = TransactionRequest {
                to: Some(TxKind::Create),
                max_fee_per_gas: Some(1234),
                max_priority_fee_per_gas: Some(678),
                nonce: Some(57),
                gas: Some(123456),
                max_fee_per_blob_gas: Some(13579),
                authorization_list: Some(vec![SignedAuthorization::new_unchecked(
                    Authorization {
                        chain_id: Default::default(),
                        address: Default::default(),
                        nonce: 0,
                    },
                    0,
                    U256::ZERO,
                    U256::ZERO,
                )]),
                ..Default::default()
            };

            let maybe_eip4844_tx: Result<TypedTransaction, _> =
                eip4844_request.build_consensus_tx();
            assert_matches!(maybe_eip4844_tx, Err(..));
        }
    }

    #[test]
    fn deserde_auth_request() {
        let s = r#"        {
            "to": "0xE854C84cD68fC434cB3B0042c29235D452cAD977",
            "value": "0x2386f26fc10000",
            "data": "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",
            "from": "0x4b19129EA58431A06D01054f69AcAe5de50633b6",
            "authorizationList": [
                {
                    "chainId": "0x2105",
                    "address": "0x000000004F43C49e93C970E84001853a70923B03",
                    "nonce": "0x0",
                    "r": "0xb3fdb76993ec6787313ab8b54129200032dfb9ce683fa9f7693129421e6a3185",
                    "s": "0x210b3350107a5687b532a346a90e7cc9a799b995743e2b79698bedba7bd779ae",
                    "v": "0x1b",
                    "yParity": "0x0"
                }
            ]
        }"#;

        let req: TransactionRequest = serde_json::from_str(s).unwrap();
        let auths = req.authorization_list.unwrap();
        assert_eq!(auths.len(), 1);
        assert_eq!(auths[0].y_parity(), 0);
    }
}