mirror of https://github.com/status-im/nim-eth.git
103 lines
2.5 KiB
Nim
103 lines
2.5 KiB
Nim
import
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../common/eth_types_rlp
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export eth_types_rlp
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const
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EIP155_CHAIN_ID_OFFSET* = 35'i64
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type
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GasPrice* = ## \
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## Handy definition distinct from `GasInt` which is a commodity unit while
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## the `GasPrice` is the commodity valuation per unit of gas, similar to a
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## kind of currency.
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distinct uint64
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GasPriceEx* = ## \
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## Similar to `GasPrice` but is allowed to be negative.
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distinct int64
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proc effectiveGasTip*(tx: Transaction; baseFee: GasPrice): GasPriceEx =
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## The effective miner gas tip for the globally argument `baseFee`. The
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## result (which is a price per gas) might well be negative.
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if tx.txType != TxEip1559:
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(tx.gasPrice - baseFee.int64).GasPriceEx
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else:
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# London, EIP1559
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min(tx.maxPriorityFee, tx.maxFee - baseFee.int64).GasPriceEx
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proc effectiveGasTip*(tx: Transaction; baseFee: UInt256): GasPriceEx =
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## Variant of `effectiveGasTip()`
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tx.effectiveGasTip(baseFee.truncate(uint64).GasPrice)
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func rlpEncodeLegacy(tx: Transaction): auto =
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var w = initRlpWriter()
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w.startList(6)
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w.append(tx.nonce)
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w.append(tx.gasPrice)
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w.append(tx.gasLimit)
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w.append(tx.to)
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w.append(tx.value)
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w.append(tx.payload)
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w.finish()
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func rlpEncodeEip155(tx: Transaction): auto =
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let chainId = (tx.V - EIP155_CHAIN_ID_OFFSET) div 2
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var w = initRlpWriter()
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w.startList(9)
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w.append(tx.nonce)
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w.append(tx.gasPrice)
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w.append(tx.gasLimit)
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w.append(tx.to)
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w.append(tx.value)
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w.append(tx.payload)
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w.append(chainId)
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w.append(0)
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w.append(0)
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w.finish()
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func rlpEncodeEip2930(tx: Transaction): auto =
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var w = initRlpWriter()
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w.append(1)
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w.startList(8)
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w.append(tx.chainId.uint64)
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w.append(tx.nonce)
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w.append(tx.gasPrice)
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w.append(tx.gasLimit)
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w.append(tx.to)
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w.append(tx.value)
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w.append(tx.payload)
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w.append(tx.accessList)
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w.finish()
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func rlpEncodeEip1559(tx: Transaction): auto =
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var w = initRlpWriter()
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w.append(2)
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w.startList(9)
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w.append(tx.chainId.uint64)
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w.append(tx.nonce)
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w.append(tx.maxPriorityFee)
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w.append(tx.maxFee)
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w.append(tx.gasLimit)
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w.append(tx.to)
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w.append(tx.value)
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w.append(tx.payload)
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w.append(tx.accessList)
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w.finish()
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func rlpEncode*(tx: Transaction): auto =
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case tx.txType
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of TxLegacy:
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if tx.V >= EIP155_CHAIN_ID_OFFSET:
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tx.rlpEncodeEip155
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else:
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tx.rlpEncodeLegacy
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of TxEip2930:
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tx.rlpEncodeEip2930
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of TxEip1559:
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tx.rlpEncodeEip1559
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func txHashNoSignature*(tx: Transaction): Hash256 =
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# Hash transaction without signature
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keccakHash(rlpEncode(tx))
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