nimbus-eth1/nimbus/vm/evmc_helpers.nim

44 lines
1.0 KiB
Nim

import eth/common, stint, evmc/evmc
const
evmc_native* {.booldefine.} = false
func toEvmc*(a: EthAddress): evmc_address {.inline.} =
cast[evmc_address](a)
func toEvmc*(h: Hash256): evmc_bytes32 {.inline.} =
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:
cast[Hash256](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))