tx: implement tx containers and tx workers [WIP]

packages/tx/src/dataContainerTypes.ts

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+import type {
+  AccessList,
+  AccessListBytes,
+  AuthorizationList,
+  AuthorizationListBytes,
+  JSONTx,
+  TransactionType,
+} from './types.js'
+import type {
+  Address,
+  AddressLike,
+  BigIntLike,
+  BytesLike,
+  PrefixedHexString,
+} from '@ethereumjs/util'
+
+// TODO
+// Make a very simple "Features" class which handles supports/activate/deactivate (?)
+
+export enum Feature {
+  ReplayProtection = 'ReplayProtection', // For EIP-155 replay protection
+  ECDSASignable = 'ECDSASignable', // For unsigned/signed ECDSA containers
+  ECDSASigned = 'ECDSASigned', // For signed ECDSA containers
+
+  LegacyGasMarket = 'LegacyGasMarket', // Txs with legacy gas market (pre-1559)
+  FeeMarket = 'FeeMarket', // Txs with EIP1559 gas market
+
+  TypedTransaction = 'TypedTransaction',
+
+  AccessLists = 'AccessLists',
+  EOACode = 'EOACode',
+}
+
+export type NestedUint8Array = (Uint8Array | NestedUint8Array)[]
+
+export interface TxDataContainer {
+  supports(capability: Feature): boolean
+  type: TransactionType
+
+  // Raw list of Uint8Arrays (can be nested)
+  raw(): NestedUint8Array // TODO make more tx-specific
+
+  // The serialized version of the raw() one
+  // (current: RLP.encode)
+  serialize(): Uint8Array
+
+  // Utility to convert to a JSON object
+  toJSON(): JSONTx
+
+  /** Signature related stuff, TODO */
+  /*
+    isSigned(): boolean
+    isValid(): boolean
+    verifySignature(): boolean
+    getSenderAddress(): Address
+    getSenderPublicKey(): Uint8Array
+    sign(privateKey: Uint8Array): Transaction[T]
+    errorStr(): string
+  
+    addSignature(
+      v: bigint,
+      r: Uint8Array | bigint,
+      s: Uint8Array | bigint,
+      convertV?: boolean,
+    ): Transaction[T]
+  
+  
+    // Get the non-hashed message to sign (this is input, but then hashed, is input to methods like ecsign)
+    getMessageToSign(): Uint8Array | Uint8Array[]
+    // Get the hashed message to sign (allows for flexibility over the hash method, now: keccak256)
+    getHashedMessageToSign(): Uint8Array
+  
+    // The hash of the transaction (note: hash currently has to do with signed txs but on L2 likely can also be of non-signed txs (?))
+    hash(): Uint8Array
+  
+    */
+}
+
+// Container "fields" and container "interface" below
+// Fields: used for the CONSTRUCTOR of the containers
+// Interface: used for the resulting constructor, so each param of the field is converted to that type before resulting in the container
+
+export type DefaultContainerDataFields = {
+  nonce?: BigIntLike
+  gasLimit?: BigIntLike
+  to?: AddressLike
+  value?: BigIntLike
+  data?: BytesLike | '' // Note: '' is for empty data (TODO look if we want to keep this)
+}
+
+export interface DefaultContainerInterface {
+  readonly gasPrice: bigint
+  readonly nonce: bigint
+  readonly gasLimit: bigint
+  readonly value: bigint
+  readonly data: Uint8Array
+  readonly to: Address | null // TODO: figure out how to handle this on txs which do not allow to:null (7702/4844)
+}
+
+export type ECDSASignedContainerFields = {
+  v?: BigIntLike
+  r?: BigIntLike
+  s?: BigIntLike
+}
+
+export interface ECDSAContainerInterface {
+  readonly v?: bigint
+  readonly r?: bigint
+  readonly s?: bigint
+}
+
+// The container / tx data fields if the tx can create contracts (to `null`)
+/*export type ContractCreationDataFields = {
+    to?: DefaultContainerDataFields['to'] | null | ''
+}*/
+
+/*
+export interface ContractCreationContainerInterface {
+    to: DefaultContainerInterface['to'] | null
+}
+*/
+
+export type LegacyGasMarketFields = {
+  gasPrice: BigIntLike
+}
+
+export interface LegacyGasMarketInterface {
+  readonly gasPrice: bigint
+}
+
+interface L1DefaultContainer
+  extends TxDataContainer,
+    DefaultContainerInterface,
+    ECDSAContainerInterface {}
+
+export interface LegacyContainerInterface extends L1DefaultContainer, LegacyGasMarketInterface {
+  // to: DefaultContainerInterface['to'] | null
+}
+
+export type ChainIdFields = {
+  chainId?: BigIntLike
+}
+
+export interface ChainIdInterface {
+  chainId: bigint
+}
+
+export type AccessListFields = {
+  accessList?: AccessListBytes | AccessList | null
+}
+
+export interface AccessListInterface {
+  accessList: AccessListBytes
+}
+
+interface L1_2930Interface extends L1DefaultContainer, ChainIdInterface, AccessListInterface {}
+
+export interface AccessList2930ContainerInterface
+  extends L1_2930Interface,
+    LegacyGasMarketInterface {}
+
+// interface AccessList2930Interface: L1DefaultFields, ContractCreationDataFields, LegacyGasMarket, ChainId, AccessList
+
+// EIP1559 txs
+export type FeeMarketFields = {
+  maxPriorityFeePerGas?: BigIntLike
+  maxFeePerGas?: BigIntLike
+}
+
+export interface FeeMarketInterface {
+  readonly maxPriorityFeePerGas: bigint
+  readonly maxFeePerGas: bigint
+}
+
+export interface FeeMarket1559Interface extends L1_2930Interface, FeeMarketInterface {}
+
+// EIP4844 txs
+export type BlobFields = {
+  blobVersionedHashes?: BytesLike[]
+  maxFeePerBlobGas?: BigIntLike
+  blobs?: BytesLike[]
+  kzgCommitments?: BytesLike[]
+  kzgProofs?: BytesLike[]
+  blobsData?: string[]
+}
+
+export interface BlobInterface {
+  readonly blobVersionedHashes: PrefixedHexString[] // TODO why is this a string and not uint8array?
+  readonly blobs?: PrefixedHexString[]
+  readonly kzgCommitments?: PrefixedHexString[]
+  readonly kzgProofs?: PrefixedHexString[]
+  readonly maxFeePerBlobGas: bigint
+}
+
+export interface Blob4844Interface extends FeeMarket1559Interface, BlobInterface {}
+
+// EIP7702 txs
+
+export type AuthorizationListFields = {
+  authorizationList?: AuthorizationListBytes | AuthorizationList | never
+}
+
+export interface AuthorizationListInterface {
+  readonly authorizationList: AuthorizationListBytes
+}
+
+export interface EOA7702Interface extends FeeMarket1559Interface, AuthorizationListInterface {}

packages/tx/src/dataContainers/AccessList2930Container.ts

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+import { Address, bytesToBigInt, toBytes } from '@ethereumjs/util'
+
+import { Feature } from '../dataContainerTypes.js'
+
+import type { AccessListInterface } from '../dataContainerTypes.js'
+
+const accessListFeatures = new Set<Feature>([
+  Feature.ECDSASignable,
+  Feature.LegacyGasMarket,
+  Feature.AccessLists,
+])
+
+export class AccessList2930Container implements AccessListInterface {}

packages/tx/src/dataContainers/EOA7702DataContainer.ts

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+import type { EOA7702Interface } from '../dataContainerTypes.js'
+
+export class EOA7702DataContainer implements EOA7702Interface {}

packages/tx/src/dataContainers/legacyContainer.ts

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+import { RLP } from '@ethereumjs/rlp'
+import { Address, bytesToBigInt, toBytes } from '@ethereumjs/util'
+
+import { Feature } from '../dataContainerTypes.js'
+import { TransactionType } from '../types.js'
+
+import type {
+  ContractCreationContainerInterface,
+  DefaultContainerInterface,
+  ECDSAContainerInterface,
+  LegacyContainerDataFields,
+  LegacyGasMarketInterface,
+  TxDataContainer,
+} from '../dataContainerTypes.js'
+import type { TxOptions } from '../types.js'
+
+const legacyFeatures = new Set<Feature>([Feature.ECDSASignable, Feature.LegacyGasMarket])
+
+export class LegacyDataContainer
+  implements
+    TxDataContainer,
+    DefaultContainerInterface,
+    ContractCreationContainerInterface,
+    ECDSAContainerInterface,
+    LegacyGasMarketInterface
+{
+  public type: number = TransactionType.Legacy // Legacy tx type
+
+  // Tx data part (part of the RLP)
+  public readonly gasPrice: bigint
+  public readonly nonce: bigint
+  public readonly gasLimit: bigint
+  public readonly value: bigint
+  public readonly data: Uint8Array
+  // TODO fix type (how to do this? need to somehow override the interface)
+  public readonly to: Address | null
+
+  // Props only for signed txs
+  public readonly v?: bigint
+  public readonly r?: bigint
+  public readonly s?: bigint
+
+  // TODO: verify if txOptions is necessary
+  // TODO (optimizing): for reach tx we auto-convert the input values to the target values (mostly bigints)
+  // Is this necessary? What if we need the unconverted values? Convert it on the fly?
+  constructor(txData: LegacyContainerDataFields, txOptions: TxOptions) {
+    const { nonce, gasLimit, to, value, data, v, r, s } = txData
+
+    // Set the tx properties
+    const toB = toBytes(to === '' ? '0x' : to)
+    this.to = toB.length > 0 ? new Address(toB) : null
+
+    this.nonce = bytesToBigInt(toBytes(nonce))
+    this.gasLimit = bytesToBigInt(toBytes(gasLimit))
+    this.value = bytesToBigInt(toBytes(value))
+    this.data = toBytes(data === '' ? '0x' : data)
+    this.gasPrice = bytesToBigInt(toBytes(txData.gasPrice))
+
+    // Set signature values (if the tx is signed)
+
+    const vB = toBytes(v)
+    const rB = toBytes(r)
+    const sB = toBytes(s)
+    this.v = vB.length > 0 ? bytesToBigInt(vB) : undefined
+    this.r = rB.length > 0 ? bytesToBigInt(rB) : undefined
+    this.s = sB.length > 0 ? bytesToBigInt(sB) : undefined
+  }
+
+  raw() {
+    // TODO
+    return []
+  }
+  serialize() {
+    return RLP.encode(this.raw())
+  }
+
+  supports(feature: Feature) {
+    return legacyFeatures.has(feature)
+  }
+
+  toJSON() {
+    return {}
+  }
+}

packages/tx/src/dataContainers/template.ts

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+import { RLP } from '@ethereumjs/rlp'
+
+import type { TxDataContainer } from '../dataContainerTypes.js'
+import type { NestedUint8Array } from '@ethereumjs/rlp'
+
+export abstract class TemplateDataContainer implements TxDataContainer {
+  type = -1
+
+  abstract raw(): NestedUint8Array
+  serialize() {
+    // Defaults to use RLP.encode
+    return RLP.encode(this.raw())
+  }
+
+  supports(/*feature: Feature*/) {
+    return false
+  }
+
+  toJSON() {
+    return {}
+  }
+}