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contracts.go
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contracts.go
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// Copyright 2014 The Elastos.ELA.SideChain.ESC Authors
// This file is part of the Elastos.ELA.SideChain.ESC library.
//
// The Elastos.ELA.SideChain.ESC library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The Elastos.ELA.SideChain.ESC library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the Elastos.ELA.SideChain.ESC library. If not, see <http://www.gnu.org/licenses/>.
package vm
import (
"bytes"
"crypto/sha256"
"encoding/binary"
"errors"
"fmt"
"math/big"
"github.com/elastos/Elastos.ELA.SideChain.ESC/accounts"
"github.com/elastos/Elastos.ELA.SideChain.ESC/common"
"github.com/elastos/Elastos.ELA.SideChain.ESC/common/math"
"github.com/elastos/Elastos.ELA.SideChain.ESC/crypto"
"github.com/elastos/Elastos.ELA.SideChain.ESC/crypto/blake2b"
"github.com/elastos/Elastos.ELA.SideChain.ESC/crypto/bls12381"
"github.com/elastos/Elastos.ELA.SideChain.ESC/crypto/bn256"
"github.com/elastos/Elastos.ELA.SideChain.ESC/log"
"github.com/elastos/Elastos.ELA.SideChain.ESC/params"
"github.com/elastos/Elastos.ELA.SideChain.ESC/pledgeBill"
"github.com/elastos/Elastos.ELA.SideChain.ESC/spv"
"github.com/elastos/Elastos.ELA/blockchain"
"github.com/elastos/Elastos.ELA/core/contract"
"github.com/elastos/Elastos.ELA/core/contract/program"
elaCrypto "github.com/elastos/Elastos.ELA/crypto"
"golang.org/x/crypto/ripemd160"
)
// PrecompiledContract is the basic interface for native Go contracts. The implementation
// requires a deterministic gas count based on the input size of the Run method of the
// contract.
type PrecompiledContract interface {
RequiredGas(input []byte) uint64 // RequiredPrice calculates the contract gas use
Run(input []byte) ([]byte, error) // Run runs the precompiled contract
}
// PrecompiledContractsHomestead contains the default set of pre-compiled Ethereum
// contracts used in the Frontier and Homestead releases.
var PrecompiledContractsHomestead = map[common.Address]PrecompiledContract{
common.BytesToAddress([]byte{1}): &ecrecover{},
common.BytesToAddress([]byte{2}): &sha256hash{},
common.BytesToAddress([]byte{3}): &ripemd160hash{},
common.BytesToAddress([]byte{4}): &dataCopy{},
}
// PrecompiledContractsByzantium contains the default set of pre-compiled Ethereum
// contracts used in the Byzantium release.
var PrecompiledContractsByzantium = map[common.Address]PrecompiledContract{
common.BytesToAddress([]byte{1}): &ecrecover{},
common.BytesToAddress([]byte{2}): &sha256hash{},
common.BytesToAddress([]byte{3}): &ripemd160hash{},
common.BytesToAddress([]byte{4}): &dataCopy{},
common.BytesToAddress([]byte{5}): &bigModExp{eip2565: false},
common.BytesToAddress([]byte{6}): &bn256AddByzantium{},
common.BytesToAddress([]byte{7}): &bn256ScalarMulByzantium{},
common.BytesToAddress([]byte{8}): &bn256PairingByzantium{},
common.BytesToAddress(params.ArbiterAddress.Bytes()): &arbiters{},
common.BytesToAddress(params.P256VerifyAddress.Bytes()): &p256Verify{},
common.BytesToAddress(params.SignatureVerifyByPbk.Bytes()): &pbkVerifySignature{},
common.BytesToAddress(params.PledgeBillVerify.Bytes()): &pledgeBillVerify{},
common.BytesToAddress(params.PledgeBillTokenID.Bytes()): &pledgeBillTokenID{},
}
// PrecompiledContractsIstanbul contains the default set of pre-compiled Ethereum
// contracts used in the Istanbul release.
var PrecompiledContractsIstanbul = map[common.Address]PrecompiledContract{
common.BytesToAddress([]byte{1}): &ecrecover{},
common.BytesToAddress([]byte{2}): &sha256hash{},
common.BytesToAddress([]byte{3}): &ripemd160hash{},
common.BytesToAddress([]byte{4}): &dataCopy{},
common.BytesToAddress([]byte{5}): &bigModExp{},
common.BytesToAddress([]byte{6}): &bn256AddIstanbul{},
common.BytesToAddress([]byte{7}): &bn256ScalarMulIstanbul{},
common.BytesToAddress([]byte{8}): &bn256PairingIstanbul{},
common.BytesToAddress([]byte{9}): &blake2F{},
common.BytesToAddress(params.ArbiterAddress.Bytes()): &arbiters{},
common.BytesToAddress(params.P256VerifyAddress.Bytes()): &p256Verify{},
common.BytesToAddress(params.SignatureVerifyByPbk.Bytes()): &pbkVerifySignature{},
common.BytesToAddress(params.PledgeBillVerify.Bytes()): &pledgeBillVerify{},
common.BytesToAddress(params.PledgeBillTokenID.Bytes()): &pledgeBillTokenID{},
common.BytesToAddress(params.PledgeBillTokenDetail.Bytes()): &pledgeBillTokenDetail{},
}
// PrecompiledContractsBLS contains the set of pre-compiled Ethereum
// contracts specified in EIP-2537. These are exported for testing purposes.
var PrecompiledContractsBLS = map[common.Address]PrecompiledContract{
common.BytesToAddress([]byte{10}): &bls12381G1Add{},
common.BytesToAddress([]byte{11}): &bls12381G1Mul{},
common.BytesToAddress([]byte{12}): &bls12381G1MultiExp{},
common.BytesToAddress([]byte{13}): &bls12381G2Add{},
common.BytesToAddress([]byte{14}): &bls12381G2Mul{},
common.BytesToAddress([]byte{15}): &bls12381G2MultiExp{},
common.BytesToAddress([]byte{16}): &bls12381Pairing{},
common.BytesToAddress([]byte{17}): &bls12381MapG1{},
common.BytesToAddress([]byte{18}): &bls12381MapG2{},
common.BytesToAddress(params.ArbiterAddress.Bytes()): &arbiters{},
common.BytesToAddress(params.P256VerifyAddress.Bytes()): &p256Verify{},
common.BytesToAddress(params.SignatureVerifyByPbk.Bytes()): &pbkVerifySignature{},
common.BytesToAddress(params.PledgeBillVerify.Bytes()): &pledgeBillVerify{},
common.BytesToAddress(params.PledgeBillTokenID.Bytes()): &pledgeBillTokenID{},
}
// PrecompiledContractsBerlin contains the default set of pre-compiled Ethereum
// contracts used in the Berlin release.
var PrecompiledContractsBerlin = map[common.Address]PrecompiledContract{
common.BytesToAddress([]byte{1}): &ecrecover{},
common.BytesToAddress([]byte{2}): &sha256hash{},
common.BytesToAddress([]byte{3}): &ripemd160hash{},
common.BytesToAddress([]byte{4}): &dataCopy{},
common.BytesToAddress([]byte{5}): &bigModExp{eip2565: true},
common.BytesToAddress([]byte{6}): &bn256AddIstanbul{},
common.BytesToAddress([]byte{7}): &bn256ScalarMulIstanbul{},
common.BytesToAddress([]byte{8}): &bn256PairingIstanbul{},
common.BytesToAddress([]byte{9}): &blake2F{},
common.BytesToAddress(params.ArbiterAddress.Bytes()): &arbiters{},
common.BytesToAddress(params.P256VerifyAddress.Bytes()): &p256Verify{},
common.BytesToAddress(params.SignatureVerifyByPbk.Bytes()): &pbkVerifySignature{},
common.BytesToAddress(params.PledgeBillVerify.Bytes()): &pledgeBillVerify{},
common.BytesToAddress(params.PledgeBillTokenID.Bytes()): &pledgeBillTokenID{},
}
var (
PrecompiledAddressesBerlin []common.Address
PrecompiledAddressesIstanbul []common.Address
PrecompiledAddressesByzantium []common.Address
PrecompiledAddressesHomestead []common.Address
)
func init() {
for k := range PrecompiledContractsHomestead {
PrecompiledAddressesHomestead = append(PrecompiledAddressesHomestead, k)
}
for k := range PrecompiledContractsByzantium {
PrecompiledAddressesByzantium = append(PrecompiledAddressesByzantium, k)
}
for k := range PrecompiledContractsIstanbul {
PrecompiledAddressesIstanbul = append(PrecompiledAddressesIstanbul, k)
}
for k := range PrecompiledContractsBerlin {
PrecompiledAddressesBerlin = append(PrecompiledAddressesBerlin, k)
}
}
// ActivePrecompiles returns the precompiles enabled with the current configuration.
func ActivePrecompiles(rules params.Rules) []common.Address {
switch {
case rules.IsBerlin:
return PrecompiledAddressesBerlin
case rules.IsIstanbul:
return PrecompiledAddressesIstanbul
case rules.IsByzantium:
return PrecompiledAddressesByzantium
default:
return PrecompiledAddressesHomestead
}
}
// RunPrecompiledContract runs and evaluates the output of a precompiled contract.
func RunPrecompiledContract(p PrecompiledContract, input []byte, suppliedGas uint64) (ret []byte, remainingGas uint64, err error) {
gasCost := p.RequiredGas(input)
if suppliedGas < gasCost {
return nil, 0, ErrOutOfGas
}
suppliedGas -= gasCost
output, err := p.Run(input)
return output, suppliedGas, err
}
// ECRECOVER implemented as a native contract.
type ecrecover struct{}
func (c *ecrecover) RequiredGas(input []byte) uint64 {
return params.EcrecoverGas
}
func (c *ecrecover) Run(input []byte) ([]byte, error) {
const ecRecoverInputLength = 128
input = common.RightPadBytes(input, ecRecoverInputLength)
// "input" is (hash, v, r, s), each 32 bytes
// but for ecrecover we want (r, s, v)
r := new(big.Int).SetBytes(input[64:96])
s := new(big.Int).SetBytes(input[96:128])
v := input[63] - 27
// tighter sig s values input homestead only apply to tx sigs
if !allZero(input[32:63]) || !crypto.ValidateSignatureValues(v, r, s, false) {
return nil, nil
}
// We must make sure not to modify the 'input', so placing the 'v' along with
// the signature needs to be done on a new allocation
sig := make([]byte, 65)
copy(sig, input[64:128])
sig[64] = v
// v needs to be at the end for libsecp256k1
pubKey, err := crypto.Ecrecover(input[:32], sig)
// make sure the public key is a valid one
if err != nil {
return nil, nil
}
// the first byte of pubkey is bitcoin heritage
return common.LeftPadBytes(crypto.Keccak256(pubKey[1:])[12:], 32), nil
}
// SHA256 implemented as a native contract.
type sha256hash struct{}
// RequiredGas returns the gas required to execute the pre-compiled contract.
//
// This method does not require any overflow checking as the input size gas costs
// required for anything significant is so high it's impossible to pay for.
func (c *sha256hash) RequiredGas(input []byte) uint64 {
return uint64(len(input)+31)/32*params.Sha256PerWordGas + params.Sha256BaseGas
}
func (c *sha256hash) Run(input []byte) ([]byte, error) {
h := sha256.Sum256(input)
return h[:], nil
}
// RIPEMD160 implemented as a native contract.
type ripemd160hash struct{}
// RequiredGas returns the gas required to execute the pre-compiled contract.
//
// This method does not require any overflow checking as the input size gas costs
// required for anything significant is so high it's impossible to pay for.
func (c *ripemd160hash) RequiredGas(input []byte) uint64 {
return uint64(len(input)+31)/32*params.Ripemd160PerWordGas + params.Ripemd160BaseGas
}
func (c *ripemd160hash) Run(input []byte) ([]byte, error) {
ripemd := ripemd160.New()
ripemd.Write(input)
return common.LeftPadBytes(ripemd.Sum(nil), 32), nil
}
// data copy implemented as a native contract.
type dataCopy struct{}
// RequiredGas returns the gas required to execute the pre-compiled contract.
//
// This method does not require any overflow checking as the input size gas costs
// required for anything significant is so high it's impossible to pay for.
func (c *dataCopy) RequiredGas(input []byte) uint64 {
return uint64(len(input)+31)/32*params.IdentityPerWordGas + params.IdentityBaseGas
}
func (c *dataCopy) Run(in []byte) ([]byte, error) {
return in, nil
}
// bigModExp implements a native big integer exponential modular operation.
type bigModExp struct {
eip2565 bool
}
var (
big0 = big.NewInt(0)
big1 = big.NewInt(1)
big3 = big.NewInt(3)
big4 = big.NewInt(4)
big7 = big.NewInt(7)
big8 = big.NewInt(8)
big16 = big.NewInt(16)
big20 = big.NewInt(20)
big32 = big.NewInt(32)
big64 = big.NewInt(64)
big96 = big.NewInt(96)
big480 = big.NewInt(480)
big1024 = big.NewInt(1024)
big3072 = big.NewInt(3072)
big199680 = big.NewInt(199680)
)
// modexpMultComplexity implements bigModexp multComplexity formula, as defined in EIP-198
//
// def mult_complexity(x):
// if x <= 64: return x ** 2
// elif x <= 1024: return x ** 2 // 4 + 96 * x - 3072
// else: return x ** 2 // 16 + 480 * x - 199680
//
// where is x is max(length_of_MODULUS, length_of_BASE)
func modexpMultComplexity(x *big.Int) *big.Int {
switch {
case x.Cmp(big64) <= 0:
x.Mul(x, x) // x ** 2
case x.Cmp(big1024) <= 0:
// (x ** 2 // 4 ) + ( 96 * x - 3072)
x = new(big.Int).Add(
new(big.Int).Div(new(big.Int).Mul(x, x), big4),
new(big.Int).Sub(new(big.Int).Mul(big96, x), big3072),
)
default:
// (x ** 2 // 16) + (480 * x - 199680)
x = new(big.Int).Add(
new(big.Int).Div(new(big.Int).Mul(x, x), big16),
new(big.Int).Sub(new(big.Int).Mul(big480, x), big199680),
)
}
return x
}
// RequiredGas returns the gas required to execute the pre-compiled contract.
func (c *bigModExp) RequiredGas(input []byte) uint64 {
var (
baseLen = new(big.Int).SetBytes(getData(input, 0, 32))
expLen = new(big.Int).SetBytes(getData(input, 32, 32))
modLen = new(big.Int).SetBytes(getData(input, 64, 32))
)
if len(input) > 96 {
input = input[96:]
} else {
input = input[:0]
}
// Retrieve the head 32 bytes of exp for the adjusted exponent length
var expHead *big.Int
if big.NewInt(int64(len(input))).Cmp(baseLen) <= 0 {
expHead = new(big.Int)
} else {
if expLen.Cmp(big32) > 0 {
expHead = new(big.Int).SetBytes(getData(input, baseLen.Uint64(), 32))
} else {
expHead = new(big.Int).SetBytes(getData(input, baseLen.Uint64(), expLen.Uint64()))
}
}
// Calculate the adjusted exponent length
var msb int
if bitlen := expHead.BitLen(); bitlen > 0 {
msb = bitlen - 1
}
adjExpLen := new(big.Int)
if expLen.Cmp(big32) > 0 {
adjExpLen.Sub(expLen, big32)
adjExpLen.Mul(big8, adjExpLen)
}
adjExpLen.Add(adjExpLen, big.NewInt(int64(msb)))
// Calculate the gas cost of the operation
gas := new(big.Int).Set(math.BigMax(modLen, baseLen))
if c.eip2565 {
// EIP-2565 has three changes
// 1. Different multComplexity (inlined here)
// in EIP-2565 (https://eips.ethereum.org/EIPS/eip-2565):
//
// def mult_complexity(x):
// ceiling(x/8)^2
//
//where is x is max(length_of_MODULUS, length_of_BASE)
gas = gas.Add(gas, big7)
gas = gas.Div(gas, big8)
gas.Mul(gas, gas)
gas.Mul(gas, math.BigMax(adjExpLen, big1))
// 2. Different divisor (`GQUADDIVISOR`) (3)
gas.Div(gas, big3)
if gas.BitLen() > 64 {
return math.MaxUint64
}
// 3. Minimum price of 200 gas
if gas.Uint64() < 200 {
return 200
}
return gas.Uint64()
}
gas = modexpMultComplexity(gas)
gas.Mul(gas, math.BigMax(adjExpLen, big1))
gas.Div(gas, big20)
if gas.BitLen() > 64 {
return math.MaxUint64
}
return gas.Uint64()
}
func (c *bigModExp) Run(input []byte) ([]byte, error) {
var (
baseLen = new(big.Int).SetBytes(getData(input, 0, 32)).Uint64()
expLen = new(big.Int).SetBytes(getData(input, 32, 32)).Uint64()
modLen = new(big.Int).SetBytes(getData(input, 64, 32)).Uint64()
)
if len(input) > 96 {
input = input[96:]
} else {
input = input[:0]
}
// Handle a special case when both the base and mod length is zero
if baseLen == 0 && modLen == 0 {
return []byte{}, nil
}
// Retrieve the operands and execute the exponentiation
var (
base = new(big.Int).SetBytes(getData(input, 0, baseLen))
exp = new(big.Int).SetBytes(getData(input, baseLen, expLen))
mod = new(big.Int).SetBytes(getData(input, baseLen+expLen, modLen))
)
if mod.BitLen() == 0 {
// Modulo 0 is undefined, return zero
return common.LeftPadBytes([]byte{}, int(modLen)), nil
}
return common.LeftPadBytes(base.Exp(base, exp, mod).Bytes(), int(modLen)), nil
}
// newCurvePoint unmarshals a binary blob into a bn256 elliptic curve point,
// returning it, or an error if the point is invalid.
func newCurvePoint(blob []byte) (*bn256.G1, error) {
p := new(bn256.G1)
if _, err := p.Unmarshal(blob); err != nil {
return nil, err
}
return p, nil
}
// newTwistPoint unmarshals a binary blob into a bn256 elliptic curve point,
// returning it, or an error if the point is invalid.
func newTwistPoint(blob []byte) (*bn256.G2, error) {
p := new(bn256.G2)
if _, err := p.Unmarshal(blob); err != nil {
return nil, err
}
return p, nil
}
// runBn256Add implements the Bn256Add precompile, referenced by both
// Byzantium and Istanbul operations.
func runBn256Add(input []byte) ([]byte, error) {
x, err := newCurvePoint(getData(input, 0, 64))
if err != nil {
return nil, err
}
y, err := newCurvePoint(getData(input, 64, 64))
if err != nil {
return nil, err
}
res := new(bn256.G1)
res.Add(x, y)
return res.Marshal(), nil
}
// bn256Add implements a native elliptic curve point addition conforming to
// Istanbul consensus rules.
type bn256AddIstanbul struct{}
// RequiredGas returns the gas required to execute the pre-compiled contract.
func (c *bn256AddIstanbul) RequiredGas(input []byte) uint64 {
return params.Bn256AddGasIstanbul
}
func (c *bn256AddIstanbul) Run(input []byte) ([]byte, error) {
return runBn256Add(input)
}
// bn256AddByzantium implements a native elliptic curve point addition
// conforming to Byzantium consensus rules.
type bn256AddByzantium struct{}
// RequiredGas returns the gas required to execute the pre-compiled contract.
func (c *bn256AddByzantium) RequiredGas(input []byte) uint64 {
return params.Bn256AddGasByzantium
}
func (c *bn256AddByzantium) Run(input []byte) ([]byte, error) {
return runBn256Add(input)
}
// runBn256ScalarMul implements the Bn256ScalarMul precompile, referenced by
// both Byzantium and Istanbul operations.
func runBn256ScalarMul(input []byte) ([]byte, error) {
p, err := newCurvePoint(getData(input, 0, 64))
if err != nil {
return nil, err
}
res := new(bn256.G1)
res.ScalarMult(p, new(big.Int).SetBytes(getData(input, 64, 32)))
return res.Marshal(), nil
}
// bn256ScalarMulIstanbul implements a native elliptic curve scalar
// multiplication conforming to Istanbul consensus rules.
type bn256ScalarMulIstanbul struct{}
// RequiredGas returns the gas required to execute the pre-compiled contract.
func (c *bn256ScalarMulIstanbul) RequiredGas(input []byte) uint64 {
return params.Bn256ScalarMulGasIstanbul
}
func (c *bn256ScalarMulIstanbul) Run(input []byte) ([]byte, error) {
return runBn256ScalarMul(input)
}
// bn256ScalarMulByzantium implements a native elliptic curve scalar
// multiplication conforming to Byzantium consensus rules.
type bn256ScalarMulByzantium struct{}
// RequiredGas returns the gas required to execute the pre-compiled contract.
func (c *bn256ScalarMulByzantium) RequiredGas(input []byte) uint64 {
return params.Bn256ScalarMulGasByzantium
}
func (c *bn256ScalarMulByzantium) Run(input []byte) ([]byte, error) {
return runBn256ScalarMul(input)
}
var (
// true32Byte is returned if the bn256 pairing check succeeds.
true32Byte = []byte{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1}
// false32Byte is returned if the bn256 pairing check fails.
false32Byte = make([]byte, 32)
// errBadPairingInput is returned if the bn256 pairing input is invalid.
errBadPairingInput = errors.New("bad elliptic curve pairing size")
)
// runBn256Pairing implements the Bn256Pairing precompile, referenced by both
// Byzantium and Istanbul operations.
func runBn256Pairing(input []byte) ([]byte, error) {
// Handle some corner cases cheaply
if len(input)%192 > 0 {
return nil, errBadPairingInput
}
// Convert the input into a set of coordinates
var (
cs []*bn256.G1
ts []*bn256.G2
)
for i := 0; i < len(input); i += 192 {
c, err := newCurvePoint(input[i : i+64])
if err != nil {
return nil, err
}
t, err := newTwistPoint(input[i+64 : i+192])
if err != nil {
return nil, err
}
cs = append(cs, c)
ts = append(ts, t)
}
// Execute the pairing checks and return the results
if bn256.PairingCheck(cs, ts) {
return true32Byte, nil
}
return false32Byte, nil
}
// bn256PairingIstanbul implements a pairing pre-compile for the bn256 curve
// conforming to Istanbul consensus rules.
type bn256PairingIstanbul struct{}
// RequiredGas returns the gas required to execute the pre-compiled contract.
func (c *bn256PairingIstanbul) RequiredGas(input []byte) uint64 {
return params.Bn256PairingBaseGasIstanbul + uint64(len(input)/192)*params.Bn256PairingPerPointGasIstanbul
}
func (c *bn256PairingIstanbul) Run(input []byte) ([]byte, error) {
return runBn256Pairing(input)
}
// bn256PairingByzantium implements a pairing pre-compile for the bn256 curve
// conforming to Byzantium consensus rules.
type bn256PairingByzantium struct{}
// RequiredGas returns the gas required to execute the pre-compiled contract.
func (c *bn256PairingByzantium) RequiredGas(input []byte) uint64 {
return params.Bn256PairingBaseGasByzantium + uint64(len(input)/192)*params.Bn256PairingPerPointGasByzantium
}
func (c *bn256PairingByzantium) Run(input []byte) ([]byte, error) {
return runBn256Pairing(input)
}
type blake2F struct{}
func (c *blake2F) RequiredGas(input []byte) uint64 {
// If the input is malformed, we can't calculate the gas, return 0 and let the
// actual call choke and fault.
if len(input) != blake2FInputLength {
return 0
}
return uint64(binary.BigEndian.Uint32(input[0:4]))
}
const (
blake2FInputLength = 213
blake2FFinalBlockBytes = byte(1)
blake2FNonFinalBlockBytes = byte(0)
)
var (
errBlake2FInvalidInputLength = errors.New("invalid input length")
errBlake2FInvalidFinalFlag = errors.New("invalid final flag")
)
func (c *blake2F) Run(input []byte) ([]byte, error) {
// Make sure the input is valid (correct lenth and final flag)
if len(input) != blake2FInputLength {
return nil, errBlake2FInvalidInputLength
}
if input[212] != blake2FNonFinalBlockBytes && input[212] != blake2FFinalBlockBytes {
return nil, errBlake2FInvalidFinalFlag
}
// Parse the input into the Blake2b call parameters
var (
rounds = binary.BigEndian.Uint32(input[0:4])
final = (input[212] == blake2FFinalBlockBytes)
h [8]uint64
m [16]uint64
t [2]uint64
)
for i := 0; i < 8; i++ {
offset := 4 + i*8
h[i] = binary.LittleEndian.Uint64(input[offset : offset+8])
}
for i := 0; i < 16; i++ {
offset := 68 + i*8
m[i] = binary.LittleEndian.Uint64(input[offset : offset+8])
}
t[0] = binary.LittleEndian.Uint64(input[196:204])
t[1] = binary.LittleEndian.Uint64(input[204:212])
// Execute the compression function, extract and return the result
blake2b.F(&h, m, t, final, rounds)
output := make([]byte, 64)
for i := 0; i < 8; i++ {
offset := i * 8
binary.LittleEndian.PutUint64(output[offset:offset+8], h[i])
}
return output, nil
}
var (
errGettingArbitersFailed = errors.New("getting arbiters failed")
)
type arbiters struct{}
func (c *arbiters) RequiredGas(input []byte) uint64 {
return params.ArbitersBaseGas
}
func (c *arbiters) Run(input []byte) ([]byte, error) {
arbiters, _, err := spv.GetArbiters()
if err != nil {
return nil, errGettingArbitersFailed
}
ret := make([]byte, 0)
for _, pubkey := range arbiters {
hash := crypto.Keccak256(common.Hex2Bytes(pubkey))
ret = append(ret, common.LeftPadBytes(hash[:], 32)...)
}
return ret, nil
}
const (
p256VerifyInputLength = 193
)
var (
errP256VerifyInvalidInputLength = errors.New("invalid input length")
errP256VerifyInvalidPublicKey = errors.New("invalid public key")
)
type p256Verify struct{}
func (c *p256Verify) RequiredGas(input []byte) uint64 {
return params.P256VerifyBaseGas
}
func (c *p256Verify) Run(input []byte) ([]byte, error) {
// Make sure the input is valid (correct length)
if len(input) != p256VerifyInputLength {
return nil, errP256VerifyInvalidInputLength
}
//length := getData(input, 0, 32)
pubkey := getData(input, 32, 33)
data := getData(input, 65, 64)
sig := getData(input, 129, 64)
publicKey, err := elaCrypto.DecodePoint(pubkey)
if err != nil {
return nil, errP256VerifyInvalidPublicKey
}
err = elaCrypto.Verify(*publicKey, data, sig)
if err != nil {
return false32Byte, nil
}
return true32Byte, nil
}
type pbkVerifySignature struct{}
func (b *pbkVerifySignature) RequiredGas(input []byte) uint64 {
return params.PbkVerifySignature
}
func (b *pbkVerifySignature) Run(input []byte) ([]byte, error) {
//length := getData(input, 0, 32)
pubkey := getData(input, 32, 33)
digest := getData(input, 65, 32)
sig := getData(input, 97, 65)
digest = accounts.TextHash(digest)
if sig[crypto.RecoveryIDOffset] >= 27 {
sig[crypto.RecoveryIDOffset] -= 27
}
signerPuk, err := crypto.SigToPub(digest, sig)
if err != nil {
fmt.Println("SigToPub error", signerPuk, err)
return false32Byte, err
}
pubkeyBytes := crypto.CompressPubkey(signerPuk)
if bytes.Equal(pubkeyBytes, pubkey) {
return true32Byte, nil
}
return false32Byte, nil
}
type pledgeBillVerify struct{}
func (b *pledgeBillVerify) RequiredGas(input []byte) uint64 {
return params.PledgeBillVerifyGas
}
func (b *pledgeBillVerify) Run(input []byte) ([]byte, error) {
elaHash := getData(input, 32, 32)
toAddress := getData(input, 64, 20)
toAddress = toAddress[:common.AddressLength]
multiN := getData(input, 84, 32)
multiM := getData(input, 116, 32)
sigLen := getData(input, 148, 32)
var startPoint int64 = 180
var i int64
n := big.NewInt(0).SetBytes(multiN)
m := big.NewInt(0).SetBytes(multiM)
publickeys := make([]*elaCrypto.PublicKey, 0)
var point uint64
for i = 0; i < n.Int64(); i++ {
point = uint64(startPoint + (i * 33))
pub := getData(input, point, 33)
pbk, err := elaCrypto.DecodePoint(pub)
if err != nil {
return false32Byte, errors.New("publicKey decode error")
}
publickeys = append(publickeys, pbk)
}
point = point + 33
signatures := make([]byte, 0)
if n.Int64() == 1 {
signature := getData(input, point, 64)
err := checkStandardSignature(publickeys[0], elaHash, toAddress, signature)
if err != nil {
log.Error("checkStandardSignature failed", "err", err)
return false32Byte, err
}
} else if m.Uint64() > 1 && n.Uint64() > 1 {
sigCount := big.NewInt(0).SetBytes(sigLen)
for i = 0; i < sigCount.Int64(); i++ {
c := point + (uint64(i) * 64)
signature := getData(input, c, 64)
signatures = append(signatures, getParameterBySignature(signature)...)
}
if n.Cmp(m) < 0 {
return false32Byte, errors.New("n is smaller than m")
}
err := checkMultiSignatures(int(m.Int64()), publickeys, signatures, elaHash, toAddress)
if err != nil {
log.Error("checkMultiSignatures failed", "err", err)
return false32Byte, err
}
} else {
return false32Byte, errors.New("error signature params")
}
return true32Byte, nil
}
func getParameterBySignature(signature []byte) []byte {
buf := new(bytes.Buffer)
buf.WriteByte(byte(len(signature)))
buf.Write(signature)
return buf.Bytes()
}
func checkStandardSignature(pubKey *elaCrypto.PublicKey, elaHash []byte, toAddress []byte, signature []byte) error {
data := append(elaHash, toAddress...)
err := elaCrypto.Verify(*pubKey, data, signature)
if err != nil {
return err
}
redeemScript, err := contract.CreateStandardRedeemScript(pubKey)
if err != nil {
return err
}
ct, err := contract.CreateStakeContractByCode(redeemScript[:])
if err != nil {
return err
}
stakeAddress, err := ct.ToProgramHash().ToAddress()
sAddress, _, err := pledgeBill.GetPledgeBillData(common.BytesToHash(elaHash).String())
if err != nil {
log.Info("general stakeAddress", "", stakeAddress)
return err
}
if sAddress != stakeAddress {
return errors.New(fmt.Sprintf("stakeAddress is not correct, spv sAddress%s, callSaddress:%s", sAddress, stakeAddress))
}
return nil
}
func checkMultiSignatures(m int, publickeys []*elaCrypto.PublicKey, signatures []byte, elaHash []byte, toAddress []byte) error {
ct, err := contract.CreateMultiSigContract(m, publickeys)
if err != nil {
return err
}
pro := program.Program{
Code: ct.Code,
Parameter: signatures,
}
data := append(elaHash, toAddress...)
err = blockchain.CheckMultiSigSignatures(pro, data)
if err != nil {
return err
}
ct.Prefix = contract.PrefixDPoSV2
stakeAddress, err := ct.ToProgramHash().ToAddress()
if err != nil {
return err
}
sAddress, _, err := pledgeBill.GetPledgeBillData(common.BytesToHash(elaHash).String())
if sAddress != stakeAddress {
return errors.New(fmt.Sprintf("stakeAddress is not correct, spv sAddress%s, callSaddress:%s", sAddress, stakeAddress))
}
return nil
}
type pledgeBillTokenID struct{}
func (b *pledgeBillTokenID) RequiredGas(input []byte) uint64 {
return params.GetPledgeBillTokenID
}
func (b *pledgeBillTokenID) Run(input []byte) ([]byte, error) {
//length := getData(input, 0, 32)
elaHash := getData(input, 32, 32)
_, tokenID, err := pledgeBill.GetPledgeBillData(common.BytesToHash(elaHash).String())
if err != nil {
log.Info("pledgeBillTokenID", "elaHash", elaHash, "hash", common.BytesToHash(elaHash).String(), "tokenID", tokenID)
return false32Byte, err
}
return tokenID.Bytes(), nil
}
type pledgeBillTokenDetail struct{}
func (p *pledgeBillTokenDetail) RequiredGas(input []byte) uint64 {
return params.GetPledgeBillTokenDetail
}
func (p *pledgeBillTokenDetail) Run(input []byte) ([]byte, error) {
return false32Byte, errors.New("not open")
//elaHash := getData(input, 32, 32)
//
//nftPayload, payloadVersion, err := pledgeBill.GetCreateNFTPayload(common.BytesToHash(elaHash).String())
//if err != nil {
// log.Info("pledgeBillTokenDetail", "elaHash", elaHash, "hash", common.BytesToHash(elaHash).String())
// return false32Byte, err
//}
//
//if payloadVersion == payload.CreateNFTVersion {
// nftPayload.StartHeight = 0
// nftPayload.EndHeight = 0
// nftPayload.Votes = 0
// nftPayload.VoteRights = 0
// nftPayload.TargetOwnerKey = []byte{}
//}
//arguments := make([]abi.Argument, 0)
//Bytes32, _ := abi.NewType("bytes32", "bytes32", nil)
//UInt32, _ := abi.NewType("uint32", "uint32", nil)
//Int64, _ := abi.NewType("int64", "int64", nil)
//String, _ := abi.NewType("string", "string", nil)
//Bytes, _ := abi.NewType("bytes", "bytes", nil)
//
//Referkey := abi.Argument{Name: "referKey", Type: Bytes32}
//arguments = append(arguments, Referkey)
//
//StakeAddress := abi.Argument{Name: "stakeAddress", Type: String}
//arguments = append(arguments, StakeAddress)
//
//GenesisBlockHash := abi.Argument{Name: "genesisBlockHash", Type: Bytes32}
//arguments = append(arguments, GenesisBlockHash)
//
//StartHeight := abi.Argument{Name: "startHeight", Type: UInt32}
//arguments = append(arguments, StartHeight)
//
//EndHeight := abi.Argument{Name: "endHeight", Type: UInt32}
//arguments = append(arguments, EndHeight)
//
//Votes := abi.Argument{Name: "votes", Type: Int64}
//arguments = append(arguments, Votes)
//
//VotesRight := abi.Argument{Name: "votesRight", Type: Int64}
//arguments = append(arguments, VotesRight)
//
//Owner := abi.Argument{Name: "targetOwner", Type: Bytes}
//arguments = append(arguments, Owner)
//
//m := abi.Method{Inputs: arguments}
//ret, err := m.Inputs.Pack(common.BytesToHash(nftPayload.ReferKey.Bytes()), nftPayload.StakeAddress, common.BytesToHash(nftPayload.GenesisBlockHash.Bytes()), nftPayload.StartHeight, nftPayload.EndHeight, nftPayload.Votes, nftPayload.VoteRights, nftPayload.TargetOwnerKey[:])
//if err != nil {
// return ret, err
//}
//return ret, nil
}
var (
errBLS12381InvalidInputLength = errors.New("invalid input length")
errBLS12381InvalidFieldElementTopBytes = errors.New("invalid field element top bytes")
errBLS12381G1PointSubgroup = errors.New("g1 point is not on correct subgroup")
errBLS12381G2PointSubgroup = errors.New("g2 point is not on correct subgroup")
)
// bls12381G1Add implements EIP-2537 G1Add precompile.
type bls12381G1Add struct{}
// RequiredGas returns the gas required to execute the pre-compiled contract.
func (c *bls12381G1Add) RequiredGas(input []byte) uint64 {
return params.Bls12381G1AddGas
}
func (c *bls12381G1Add) Run(input []byte) ([]byte, error) {
// Implements EIP-2537 G1Add precompile.
// > G1 addition call expects `256` bytes as an input that is interpreted as byte concatenation of two G1 points (`128` bytes each).
// > Output is an encoding of addition operation result - single G1 point (`128` bytes).
if len(input) != 256 {
return nil, errBLS12381InvalidInputLength
}
var err error
var p0, p1 *bls12381.PointG1
// Initialize G1
g := bls12381.NewG1()
// Decode G1 point p_0
if p0, err = g.DecodePoint(input[:128]); err != nil {
return nil, err
}
// Decode G1 point p_1
if p1, err = g.DecodePoint(input[128:]); err != nil {
return nil, err
}
// Compute r = p_0 + p_1
r := g.New()
g.Add(r, p0, p1)
// Encode the G1 point result into 128 bytes
return g.EncodePoint(r), nil
}
// bls12381G1Mul implements EIP-2537 G1Mul precompile.
type bls12381G1Mul struct{}
// RequiredGas returns the gas required to execute the pre-compiled contract.
func (c *bls12381G1Mul) RequiredGas(input []byte) uint64 {
return params.Bls12381G1MulGas
}
func (c *bls12381G1Mul) Run(input []byte) ([]byte, error) {
// Implements EIP-2537 G1Mul precompile.
// > G1 multiplication call expects `160` bytes as an input that is interpreted as byte concatenation of encoding of G1 point (`128` bytes) and encoding of a scalar value (`32` bytes).
// > Output is an encoding of multiplication operation result - single G1 point (`128` bytes).
if len(input) != 160 {
return nil, errBLS12381InvalidInputLength
}
var err error
var p0 *bls12381.PointG1
// Initialize G1