mirror of https://github.com/status-im/nim-eth.git
120 lines
3.3 KiB
Nim
120 lines
3.3 KiB
Nim
import
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nimcrypto/keccak,
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".."/[common, rlp, keys]
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proc initLegacyTx*(nonce: AccountNonce, gasPrice, gasLimit: GasInt, to: EthAddress,
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value: UInt256, payload: Blob, V: int64, R, S: UInt256, isContractCreation = false): LegacyTx =
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result.nonce = nonce
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result.gasPrice = gasPrice
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result.gasLimit = gasLimit
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result.to = to
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result.value = value
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result.payload = payload
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result.V = V
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result.R = R
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result.S = S
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result.isContractCreation = isContractCreation
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type
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LegacyUnsignedTx* = object
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nonce*: AccountNonce
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gasPrice*: GasInt
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gasLimit*: GasInt
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to* {.rlpCustomSerialization.}: EthAddress
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value*: UInt256
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payload*: Blob
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isContractCreation* {.rlpIgnore.}: bool
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AccessListUnsignedTx* = object
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chainId* {.rlpCustomSerialization.}: ChainId
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nonce* : AccountNonce
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gasPrice* : GasInt
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gasLimit* : GasInt
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to* {.rlpCustomSerialization.}: EthAddress
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value* : UInt256
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payload* : Blob
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accessList*: AccessList
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isContractCreation* {.rlpIgnore.}: bool
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UnsignedTxTypes* = LegacyUnsignedTx | AccessListUnsignedTx
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proc read*(rlp: var Rlp, t: var UnsignedTxTypes, _: type EthAddress): EthAddress {.inline.} =
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if rlp.blobLen != 0:
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result = rlp.read(EthAddress)
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else:
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t.isContractCreation = true
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proc append*(rlpWriter: var RlpWriter, t: UnsignedTxTypes, a: EthAddress) {.inline.} =
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if t.isContractCreation:
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rlpWriter.append("")
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else:
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rlpWriter.append(a)
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proc read*(rlp: var Rlp, t: var AccessListUnsignedTx, _: type ChainId): ChainId {.inline.} =
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rlp.read(uint64).ChainId
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proc append*(rlpWriter: var RlpWriter, t: AccessListUnsignedTx, a: ChainId) {.inline.} =
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rlpWriter.append(a.uint64)
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const
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EIP155_CHAIN_ID_OFFSET* = 35'i64
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func rlpEncode*(tx: LegacyTx): auto =
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# Encode transaction without signature
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return rlp.encode(LegacyUnsignedTx(
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nonce: tx.nonce,
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gasPrice: tx.gasPrice,
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gasLimit: tx.gasLimit,
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to: tx.to,
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value: tx.value,
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payload: tx.payload,
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isContractCreation: tx.isContractCreation
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))
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func rlpEncodeEIP155*(tx: LegacyTx): auto =
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let V = (tx.V - EIP155_CHAIN_ID_OFFSET) div 2
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# Encode transaction without signature
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return rlp.encode(LegacyTx(
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nonce: tx.nonce,
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gasPrice: tx.gasPrice,
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gasLimit: tx.gasLimit,
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to: tx.to,
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value: tx.value,
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payload: tx.payload,
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isContractCreation: tx.isContractCreation,
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V: V,
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R: 0.u256,
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S: 0.u256
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))
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func rlpEncode*(tx: AccessListTx): auto =
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# EIP 2718/2930
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let unsignedTx = AccessListUnsignedTx(
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chainId: tx.chainId,
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nonce: tx.nonce,
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gasPrice: tx.gasPrice,
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gasLimit: tx.gasLimit,
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to: tx.to,
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value: tx.value,
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payload: tx.payload,
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accessList: tx.accessList,
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isContractCreation: tx.isContractCreation
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)
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var rw = initRlpWriter()
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rw.append(1)
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rw.append(unsignedTx)
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rw.finish()
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func txHashNoSignature*(tx: LegacyTx): Hash256 =
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# Hash transaction without signature
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keccak256.digest(if tx.V >= EIP155_CHAIN_ID_OFFSET: tx.rlpEncodeEIP155 else: tx.rlpEncode)
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func txHashNoSignature*(tx: AccessListTx): Hash256 =
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keccak256.digest(tx.rlpEncode)
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func txHashNoSignature*(tx: Transaction): Hash256 =
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if tx.txType == LegacyTxType:
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txHashNoSignature(tx.legacyTx)
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else:
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txHashNoSignature(tx.accessListTx)
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