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Add SHA256, RIPEMD160 and Identity precompiles

This commit is contained in:
coffeepots 2018-10-03 13:33:19 +01:00
parent fcffd94469
commit 3deb09bbb6
1 changed files with 32 additions and 2 deletions
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34
nimbus/vm/precompiles.nim
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@ -1,7 +1,7 @@
import
../vm_types, interpreter/[gas_meter, gas_costs],
../errors, stint, eth_keys, eth_common, chronicles, tables, macros,
message
message, math, nimcrypto
type
PrecompileAddresses = enum
@ -38,7 +38,34 @@ proc ecRecover*(computation: var BaseComputation) =
raise newException(ValidationError, "Could not derive public key from computation")
computation.rawOutput = @(pubKey.toCanonicalAddress())
debug "ECRecover derived key ", key = pubKey.toCanonicalAddress()
debug "ECRecover precompile", derivedKey = pubKey.toCanonicalAddress()
proc sha256*(computation: var BaseComputation) =
let
wordCount = computation.msg.data.len div 32
gasFee = GAS_SHA256 + wordCount * GAS_SHA256WORD
computation.gasMeter.consumeGas(gasFee, reason="SHA256 Precompile")
computation.rawOutput = @(keccak_256.digest(computation.msg.data).data)
debug "SHA256 precompile", output = computation.rawOutput
proc ripemd160(computation: var BaseComputation) =
let
wordCount = computation.msg.data.len div 32
gasFee = GAS_RIPEMD160 + wordCount * GAS_RIPEMD160WORD
computation.gasMeter.consumeGas(gasFee, reason="RIPEMD160 Precompile")
computation.rawOutput = @(nimcrypto.ripemd160.digest(computation.msg.data).data)
debug "RIPEMD160 precompile", output = computation.rawOutput
proc identity*(computation: var BaseComputation) =
let
wordCount = computation.msg.data.len div 32
gasFee = GAS_IDENTITY + wordCount * GAS_IDENTITYWORD
computation.gasMeter.consumeGas(gas_fee, reason="Identity Precompile")
computation.rawOutput = computation.msg.data
debug "Identity precompile", output = computation.rawOutput
proc execPrecompiles*(computation: var BaseComputation): bool {.inline.} =
const
@ -56,5 +83,8 @@ proc execPrecompiles*(computation: var BaseComputation): bool {.inline.} =
debug "Call precompile ", precompile = precompile, codeAddr = computation.msg.codeAddress
case precompile
of paEcRecover: ecRecover(computation)
of paSha256: sha256(computation)
of paRipeMd160: ripeMd160(computation)
of paIdentity: identity(computation)
else:
raise newException(ValidationError, "Unknown precompile address " & $lb)