nimbus-eth1/nimbus/vm2/evmc_helpers.nim

49 lines
1.2 KiB
Nim

import eth/common, stint, evmc/evmc, ../utils
const
evmc_native* {.booldefine.} = false
func toEvmc*(a: EthAddress): evmc_address {.inline.} =
cast[evmc_address](a)
func toEvmc*(h: Hash256 | ContractSalt): evmc_bytes32 {.inline.} =
doAssert sizeof(h) == sizeof(evmc_bytes32)
cast[evmc_bytes32](h)
func toEvmc*(n: UInt256): evmc_uint256be {.inline.} =
when evmc_native:
cast[evmc_uint256be](n)
else:
cast[evmc_uint256be](n.toByteArrayBE)
func fromEvmc*(T: type, n: evmc_bytes32): T {.inline.} =
when T is Hash256 | ContractSalt:
doAssert sizeof(n) == sizeof(T)
cast[T](n)
elif T is UInt256:
when evmc_native:
cast[UInt256](n)
else:
UInt256.fromBytesBE(n.bytes)
else:
{.error: "cannot convert unsupported evmc type".}
func fromEvmc*(a: evmc_address): EthAddress {.inline.} =
cast[EthAddress](a)
when isMainModule:
import ../constants
var a: evmc_address
a.bytes[19] = 3.byte
var na = fromEvmc(a)
assert(a == toEvmc(na))
var b = stuint(10, 256)
var eb = b.toEvmc
assert(b == fromEvmc(UInt256, eb))
var h = EMPTY_SHA3
var eh = toEvmc(h)
assert(h == fromEvmc(Hash256, eh))
var s = cast[ContractSalt](EMPTY_ROOT_HASH)
var es = toEvmc(s)
assert(s == fromEvmc(ContractSalt, es))