//! Alloy basic Transaction Request type.

use crate::{transaction::AccessList, BlobTransactionSidecar, Transaction, TransactionTrait};
use alloy_consensus::{
    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, TxKind, B256, U256};
use core::hash::Hash;

use alloc::{
    string::{String, ToString},
    vec,
    vec::Vec,
};

/// 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 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_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 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 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.
    pub fn input(mut self, input: TransactionInput) -> Self {
        self.input = input;
        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)
    }

    /// 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.
    fn build_legacy(self) -> Result<TxLegacy, &'static str> {
        let checked_to = self.to.ok_or("Missing 'to' field for legacy transaction.")?;

        Ok(TxLegacy {
            chain_id: self.chain_id,
            nonce: self.nonce.ok_or("Missing 'nonce' field for legacy transaction.")?,
            gas_price: self.gas_price.ok_or("Missing 'gas_price' for legacy transaction.")?,
            gas_limit: self.gas.ok_or("Missing 'gas_limit' for legacy transaction.")?,
            to: checked_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.
    fn build_1559(self) -> Result<TxEip1559, &'static str> {
        let checked_to = self.to.ok_or("Missing 'to' field for Eip1559 transaction.")?;

        Ok(TxEip1559 {
            chain_id: self.chain_id.unwrap_or(1),
            nonce: self.nonce.ok_or("Missing 'nonce' field for Eip1559 transaction.")?,
            max_priority_fee_per_gas: self
                .max_priority_fee_per_gas
                .ok_or("Missing 'max_priority_fee_per_gas' field for Eip1559 transaction.")?,
            max_fee_per_gas: self
                .max_fee_per_gas
                .ok_or("Missing 'max_fee_per_gas' field for Eip1559 transaction.")?,
            gas_limit: self.gas.ok_or("Missing 'gas_limit' field for Eip1559 transaction.")?,
            to: checked_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.
    fn build_2930(self) -> Result<TxEip2930, &'static str> {
        let checked_to = self.to.ok_or("Missing 'to' field for Eip2930 transaction.")?;

        Ok(TxEip2930 {
            chain_id: self.chain_id.unwrap_or(1),
            nonce: self.nonce.ok_or("Missing 'nonce' field for Eip2930 transaction.")?,
            gas_price: self
                .gas_price
                .ok_or("Missing 'gas_price' field for Eip2930 transaction.")?,
            gas_limit: self.gas.ok_or("Missing 'gas_limit' field for Eip2930 transaction.")?,
            to: checked_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.
    fn build_4844_variant(self) -> Result<TxEip4844Variant, &'static str> {
        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.
    fn build_4844_without_sidecar(self) -> Result<TxEip4844, &'static str> {
        let checked_to = self.to.ok_or("Missing 'to' field for Eip4844 transaction.")?;

        let to_address = match checked_to {
            TxKind::Create => return Err("The field `to` can only be of type TxKind::Call(Account). Please change it accordingly."),
            TxKind::Call(to) => to,
        };

        Ok(TxEip4844 {
            chain_id: self.chain_id.unwrap_or(1),
            nonce: self.nonce.ok_or("Missing 'nonce' field for Eip4844 transaction.")?,
            gas_limit: self.gas.ok_or("Missing 'gas_limit' field for Eip4844 transaction.")?,
            max_fee_per_gas: self
                .max_fee_per_gas
                .ok_or("Missing 'max_fee_per_gas' field for Eip4844 transaction.")?,
            max_priority_fee_per_gas: self
                .max_priority_fee_per_gas
                .ok_or("Missing 'max_priority_fee_per_gas' field for Eip4844 transaction.")?,
            to: to_address,
            value: self.value.unwrap_or_default(),
            access_list: self.access_list.unwrap_or_default(),
            blob_versioned_hashes: self
                .blob_versioned_hashes
                .ok_or("Missing 'blob_versioned_hashes' field for Eip4844 transaction.")?,
            max_fee_per_blob_gas: self
                .max_fee_per_blob_gas
                .ok_or("Missing 'max_fee_per_blob_gas' field for Eip4844 transaction.")?,
            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.
    fn build_4844_with_sidecar(mut self) -> Result<TxEip4844WithSidecar, &'static str> {
        self.populate_blob_hashes();

        let sidecar =
            self.sidecar.clone().ok_or("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.
    fn build_7702(self) -> Result<TxEip7702, &'static str> {
        let to_address = self.to.ok_or("Missing 'to' field for Eip7702 transaction.")?.to().copied().ok_or("The field `to` can only be of type TxKind::Call(Account). Please change it accordingly.")?;

        Ok(TxEip7702 {
            chain_id: self.chain_id.unwrap_or(1),
            nonce: self.nonce.ok_or("Missing 'nonce' field for Eip7702 transaction.")?,
            gas_limit: self.gas.ok_or("Missing 'gas_limit' field for Eip7702 transaction.")?,
            max_fee_per_gas: self
                .max_fee_per_gas
                .ok_or("Missing 'max_fee_per_gas' field for Eip7702 transaction.")?,
            max_priority_fee_per_gas: self
                .max_priority_fee_per_gas
                .ok_or("Missing 'max_priority_fee_per_gas' field for Eip7702 transaction.")?,
            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(),
        })
    }

    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;
            }
        }
    }

    /// Check this builder's preferred type, based on the fields that 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
    pub const fn preferred_type(&self) -> TxType {
        if self.authorization_list.is_some() {
            TxType::Eip7702
        } else if self.sidecar.is_some() || self.max_fee_per_blob_gas.is_some() {
            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_none() {
            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.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 versino 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.clone().build_legacy().map(Into::into),
            TxType::Eip2930 => self.clone().build_2930().map(Into::into),
            TxType::Eip1559 => self.clone().build_1559().map(Into::into),
            TxType::Eip4844 => self.clone().build_4844_variant().map(Into::into),
            TxType::Eip7702 => self.clone().build_7702().map(Into::into),
        }
        .map_err(|msg| self.into_tx_err(msg))
    }

    /// Converts the transaction request into a `BuildTransactionErr` with the given message.
    fn into_tx_err(self, message: &'static str) -> BuildTransactionErr {
        BuildTransactionErr { tx: self, error: message.to_string() }
    }
}

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);
    }
}

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()
                }
            }
        }
    }
}

/// 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)
    }

    /// 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 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;

/// 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,
}

#[cfg(test)]
mod tests {
    use super::*;
    use alloy_primitives::b256;
    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{:x}" }}"#, chain_id);
        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.clone()),
                ..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);

            // 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(..));
        }
    }
}