Module alloy_eips::eip4844

EIP-4844 constants and helpers.

Modules

• builder
  Builder and utils for the EIP-4844 Blob Transaction
• utils
  Utilities for working with EIP-4844 field elements and implementing SidecarCoder.

Structs

• BlobAndProofV1
  Blob type returned in responses to engine_getBlobsV1: https://github.com/ethereum/execution-apis/pull/559
• BlobTransactionSidecar
  This represents a set of blobs, and its corresponding commitments and proofs.
• BlobTransactionSidecarItem
  A single blob sidecar.
• IndexedBlobHash
  A Blob hash

Constants

• BLOB_GASPRICE_UPDATE_FRACTION
  Determines the maximum rate of change for blob fee
• BLOB_TX_MIN_BLOB_GASPRICE
  Minimum gas price for a data blob
• BLS_MODULUS
  The modulus of the BLS group used in the KZG commitment scheme. All field elements contained in a blob MUST be STRICTLY LESS than this value.
• BLS_MODULUS_BYTES
  The modulus of the BLS group used in the KZG commitment scheme. All field elements contained in a blob MUST be STRICTLY LESS than this value.
• BYTES_PER_BLOB
  How many bytes are in a blob Same as DATA_GAS_PER_BLOB, but as an usize
• BYTES_PER_COMMITMENT
  How many bytes are in a commitment
• BYTES_PER_PROOF
  How many bytes are in a proof
• DATA_GAS_PER_BLOB
  Gas consumption of a single data blob.
• FIELD_ELEMENTS_PER_BLOB
  How many field elements are stored in a single data blob.
• FIELD_ELEMENT_BYTES
  Size a single field element in bytes.
• FIELD_ELEMENT_BYTES_USIZE
  Size a single field element in bytes.
• MAX_BLOBS_PER_BLOCK
  Maximum number of data blobs in a single block.
• MAX_DATA_GAS_PER_BLOCK
  Maximum data gas for data blobs in a single block.
• TARGET_BLOBS_PER_BLOCK
  Target number of data blobs in a single block.
• TARGET_DATA_GAS_PER_BLOCK
  Target data gas for data blobs in a single block.
• USABLE_BITS_PER_FIELD_ELEMENT
  Number of usable bits in a field element. The top two bits are always zero.
• USABLE_BYTES_PER_BLOB
  The number of usable bytes in a single data blob. This is the number of bytes you can encode in a blob without any field element being >= BLS_MODULUS.
• VERSIONED_HASH_VERSION_KZG
  Commitment version of a KZG commitment

Functions

• calc_blob_gasprice
  Calculates the blob gas price from the header’s excess blob gas field.
• calc_excess_blob_gas
  Calculates the excess_blob_gas from the parent header’s blob_gas_used and excess_blob_gas.
• deserialize_blob
  Helper function to deserialize boxed blobs.
• fake_exponential
  Approximates factor * e ** (numerator / denominator) using Taylor expansion.
• kzg_to_versioned_hash
  Calculates the versioned hash for a KzgCommitment of 48 bytes.

Type Aliases

• Blob
  A Blob serialized as 0x-prefixed hex string
• Bytes48
  A commitment/proof serialized as 0x-prefixed hex string