nimbus-eth1/premix/parser.nim

130 lines
4.0 KiB
Nim

import
json, strutils, times, options, os,
rlp, httputils, nimcrypto, chronicles,
stint, eth_common, byteutils
import
../nimbus/[transaction, rpc/hexstrings]
func hexToInt*(s: string, T: typedesc[SomeInteger]): T =
var i = 0
if s[i] == '0' and (s[i+1] in {'x', 'X'}): inc(i, 2)
if s.len - i > sizeof(T) * 2:
raise newException(ValueError, "input hex too big for destination int")
while i < s.len:
result = result shl 4 or readHexChar(s[i]).T
inc(i)
proc prefixHex*(x: Hash256): string =
"0x" & toLowerAscii($x)
proc prefixHex*(x: int64 | uint64 | byte | int): string =
encodeQuantity(x.uint64).toLowerAscii
proc prefixHex*(x: openArray[byte]): string =
"0x" & toHex(x, true)
proc prefixHex*(x: UInt256): string =
"0x" & stint.toHex(x)
proc prefixHex*(x: string): string =
"0x" & toLowerAscii(x)
type
SomeData = EthAddress | BloomFilter | BlockNonce
proc fromJson(n: JsonNode, name: string, x: var SomeData) =
hexToByteArray(n[name].getStr(), x)
assert(x.prefixHex == toLowerAscii(n[name].getStr()))
proc fromJson(n: JsonNode, name: string, x: var Hash256) =
hexToByteArray(n[name].getStr(), x.data)
assert(x.prefixHex == toLowerAscii(n[name].getStr()))
proc fromJson(n: JsonNode, name: string, x: var Blob) =
x = hexToSeqByte(n[name].getStr())
assert(x.prefixHex == toLowerAscii(n[name].getStr()))
proc fromJson(n: JsonNode, name: string, x: var UInt256) =
x = UInt256.fromHex(n[name].getStr())
assert(x.prefixHex == toLowerAscii(n[name].getStr()))
proc fromJson(n: JsonNode, name: string, x: var SomeInteger) =
x = hexToInt(n[name].getStr(), type(x))
assert(x.prefixHex == toLowerAscii(n[name].getStr()))
proc fromJson(n: JsonNode, name: string, x: var EthTime) =
x = initTime(hexToInt(n[name].getStr(), int64), 0)
assert(x.toUnix.prefixHex == toLowerAscii(n[name].getStr()))
proc parseBlockHeader*(n: JsonNode): BlockHeader =
n.fromJson "parentHash", result.parentHash
n.fromJson "sha3Uncles", result.ommersHash
n.fromJson "miner", result.coinbase
n.fromJson "stateRoot", result.stateRoot
n.fromJson "transactionsRoot", result.txRoot
n.fromJson "receiptsRoot", result.receiptRoot
n.fromJson "logsBloom", result.bloom
n.fromJson "difficulty", result.difficulty
n.fromJson "number", result.blockNumber
n.fromJson "gasLimit", result.gasLimit
n.fromJson "gasUsed", result.gasUsed
n.fromJson "timestamp", result.timestamp
n.fromJson "extraData", result.extraData
n.fromJson "mixHash", result.mixDigest
n.fromJson "nonce", result.nonce
proc parseTransaction*(n: JsonNode): Transaction =
n.fromJson "nonce", result.accountNonce
n.fromJson "gasPrice", result.gasPrice
n.fromJson "gas", result.gasLimit
result.isContractCreation = n["to"].kind == JNull
if not result.isContractCreation:
n.fromJson "to", result.to
n.fromJson "value", result.value
n.fromJson "input", result.payload
n.fromJson "v", result.V
n.fromJson "r", result.R
n.fromJson "s", result.S
var sender = result.getSender()
assert sender.prefixHex == n["from"].getStr()
assert n["hash"].getStr() == result.rlpHash().prefixHex
proc parseLog(n: JsonNode): Log =
n.fromJson "address", result.address
n.fromJson "data", result.data
let topics = n["topics"]
result.topics = newSeqOfCap[Topic](n.len)
var topicHash: Topic
for tp in topics:
hexToByteArray(tp.getStr(), topicHash)
result.topics.add topicHash
proc parseLogs(n: JsonNode): seq[Log] =
if n.len > 0:
result = newSeqOfCap[Log](n.len)
for log in n:
result.add parseLog(log)
else:
result = @[]
proc parseReceipt*(n: JsonNode): Receipt =
if n.hasKey("root"):
var hash: Hash256
n.fromJson "root", hash
result.stateRootOrStatus = hashOrStatus(hash)
else:
var status: int
n.fromJson "status", status
result.stateRootOrStatus = hashOrStatus(status == 1)
n.fromJson "cumulativeGasUsed", result.cumulativeGasUsed
n.fromJson "logsBloom", result.bloom
result.logs = parseLogs(n["logs"])
proc headerHash*(n: JsonNode): Hash256 =
n.fromJson "hash", result