Struct TxEnv 

pub struct TxEnv {

    pub tx_type: u8,
    pub caller: Address,
    pub gas_limit: u64,
    pub gas_price: u128,
    pub kind: TxKind,
    pub value: U256,
    pub data: Bytes,
    pub nonce: u64,
    pub chain_id: Option<u64>,
    pub access_list: AccessList,
    pub gas_priority_fee: Option<u128>,
    pub blob_hashes: Vec<B256>,
    pub max_fee_per_blob_gas: u128,
    pub authorization_list: Vec<Either<SignedAuthorization, RecoveredAuthorization>>,
}

The Transaction Environment is a struct that contains all fields that can be found in all Ethereum transaction, including EIP-4844, EIP-7702, EIP-7873, etc. It implements the Transaction trait, which is used inside the EVM to execute a transaction.

TxEnvBuilder builder is recommended way to create a new TxEnv as it will automatically set the transaction type based on the fields set.

Fields

tx_type: u8

Transaction type

caller: Address

Caller aka Author aka transaction signer

gas_limit: u64

The gas limit of the transaction.

gas_price: u128

The gas price of the transaction.

For EIP-1559 transaction this represent max_gas_fee.

kind: TxKind

The destination of the transaction

value: U256

The value sent to transact_to

data: Bytes

The data of the transaction

nonce: u64

The nonce of the transaction

chain_id: Option<u64>

The chain ID of the transaction

Incorporated as part of the Spurious Dragon upgrade via EIP-155.

access_list: AccessList

A list of addresses and storage keys that the transaction plans to access

Added in EIP-2930.

gas_priority_fee: Option<u128>

The priority fee per gas

Incorporated as part of the London upgrade via EIP-1559.

blob_hashes: Vec<B256>

The list of blob versioned hashes

Per EIP there should be at least one blob present if max_fee_per_blob_gas is Some.

Incorporated as part of the Cancun upgrade via EIP-4844.

max_fee_per_blob_gas: u128

The max fee per blob gas

Incorporated as part of the Cancun upgrade via EIP-4844.

authorization_list: Vec<Either<SignedAuthorization, RecoveredAuthorization>>

List of authorizations

authorization_list contains the signature that authorizes this caller to place the code to signer account.

Set EOA account code for one transaction via EIP-7702.

Implementations

impl TxEnv

pub fn new_bench() -> Self

Creates a new TxEnv with benchmark-specific values.

pub fn derive_tx_type(&mut self) -> Result<(), DeriveTxTypeError>

Derives tx type from transaction fields and sets it to tx_type. Returns error in case some fields were not set correctly.

pub fn set_signed_authorization(&mut self, auth: Vec<SignedAuthorization>)

Insert a list of signed authorizations into the authorization list.

pub fn set_recovered_authorization(&mut self, auth: Vec<RecoveredAuthorization>)

Insert a list of recovered authorizations into the authorization list.

impl TxEnv

pub fn builder() -> TxEnvBuilder

Create a new builder for constructing a TxEnv

pub fn builder_for_bench() -> TxEnvBuilder

Create a new builder for constructing a TxEnv with benchmark-specific values.

pub fn modify(self) -> TxEnvBuilder

Modify the TxEnv by using builder pattern.

Trait Implementations

impl Clone for TxEnv

fn clone(&self) -> TxEnv

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for TxEnv

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for TxEnv

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for TxEnv

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for TxEnv

fn eq(&self, other: &TxEnv) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for TxEnv

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Transaction for TxEnv

type AccessListItem<'a> = &'a AccessListItem

EIP-2930 Access list item type.

type Authorization<'a> = &'a Either<SignedAuthorization, RecoveredAuthorization>

EIP-7702 Authorization type.

fn tx_type(&self) -> u8

Returns the transaction type.

fn kind(&self) -> TxKind

Transaction kind. It can be Call or Create.

fn caller(&self) -> Address

Caller aka Author aka transaction signer.

fn gas_limit(&self) -> u64

The maximum amount of gas the transaction can use.

fn gas_price(&self) -> u128

Gas price for the transaction. It is only applicable for Legacy and EIP-2930 transactions. For Eip1559 it is max_fee_per_gas.

fn value(&self) -> U256

The value sent to the receiver of [TxKind::Call].

fn nonce(&self) -> u64

The nonce of the transaction.

fn chain_id(&self) -> Option<u64>

Chain Id is optional for legacy transactions.

fn access_list(&self) -> Option<impl Iterator<Item = Self::AccessListItem<'_>>>

Access list for the transaction.

fn max_fee_per_gas(&self) -> u128

Returns maximum fee that can be paid for the transaction.

fn max_fee_per_blob_gas(&self) -> u128

Max fee per data gas

fn authorization_list_len(&self) -> usize

Returns length of the authorization list.

fn authorization_list(&self) -> impl Iterator<Item = Self::Authorization<'_>>

List of authorizations, that contains the signature that authorizes this caller to place the code to signer account.

fn input(&self) -> &Bytes

Returns the input data of the transaction.

fn blob_versioned_hashes(&self) -> &[B256]

Returns vector of fixed size hash(32 bytes)

fn max_priority_fee_per_gas(&self) -> Option<u128>

Maximum priority fee per gas.

fn total_blob_gas(&self) -> u64

Total gas for all blobs. Max number of blocks is already checked so we dont need to check for overflow.

fn calc_max_data_fee(&self) -> Uint<256, 4>

Calculates the maximum [EIP-4844] data_fee of the transaction.

fn effective_gas_price(&self, base_fee: u128) -> u128

Returns effective gas price is gas price field for Legacy and Eip2930 transaction.

fn max_balance_spending(&self) -> Result<Uint<256, 4>, InvalidTransaction>

Returns the maximum balance that can be spent by the transaction.

fn ensure_enough_balance( &self, balance: Uint<256, 4>, ) -> Result<(), InvalidTransaction>

Checks if the caller has enough balance to cover the maximum balance spending of this transaction.

fn effective_balance_spending( &self, base_fee: u128, blob_price: u128, ) -> Result<Uint<256, 4>, InvalidTransaction>

Returns the effective balance that is going to be spent that depends on base_fee Multiplication for gas are done in u128 type (saturated) and value is added as U256 type.

fn gas_balance_spending( &self, base_fee: u128, blob_price: u128, ) -> Result<Uint<256, 4>, InvalidTransaction>

Returns the effective balance calculated with Self::effective_balance_spending but without the value.

impl Eq for TxEnv

impl StructuralPartialEq for TxEnv