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evm: fix Chain ID derivation (#579)

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* evm: fix Chain ID derivation

* update

* changelog
This commit is contained in:
Federico Kunze Küllmer 2021-09-21 13:31:19 +02:00 committed by GitHub
parent 20785afeb7
commit d84837a438
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
3 changed files with 44 additions and 11 deletions
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1
CHANGELOG.md
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@ -55,6 +55,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
### Bug Fixes
* (evm) [tharsis#579](https://github.com/tharsis/ethermint/pull/579) Update `DeriveChainID` function to handle `v` signature values `< 35`.
* (encoding) [tharsis#478](https://github.com/tharsis/ethermint/pull/478) Register `Evidence` to amino codec.
* (rpc) [tharsis#478](https://github.com/tharsis/ethermint/pull/481) Getting the node configuration when calling the `miner` rpc methods.
* (cli) [tharsis#561](https://github.com/tharsis/ethermint/pull/561) `Export` and `Start` commands now use the same home directory.

16
x/evm/types/tx_data.go
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@ -54,9 +54,15 @@ func NewTxDataFromTx(tx *ethtypes.Transaction) TxData {
return txData
}
// DeriveChainID derives the chain id from the given v parameter
// DeriveChainID derives the chain id from the given v parameter.
//
// CONTRACT: v value is either:
//
// - {0,1} + CHAIN_ID * 2 + 35, if EIP155 is used
// - {0,1} + 27, otherwise
// Ref: https://github.com/ethereum/EIPs/blob/master/EIPS/eip-155.md
func DeriveChainID(v *big.Int) *big.Int {
if v == nil {
if v == nil || v.Sign() < 1 {
return nil
}
@ -65,6 +71,12 @@ func DeriveChainID(v *big.Int) *big.Int {
if v == 27 || v == 28 {
return new(big.Int)
}
if v < 35 {
return nil
}
// V MUST be of the form {0,1} + CHAIN_ID * 2 + 35
return new(big.Int).SetUint64((v - 35) / 2)
}
v = new(big.Int).Sub(v, big.NewInt(35))

38
x/evm/types/tx_data_test.go
View File

@ -7,9 +7,6 @@ import (
"github.com/stretchr/testify/require"
sdk "github.com/cosmos/cosmos-sdk/types"
"github.com/ethereum/go-ethereum/common"
"github.com/tharsis/ethermint/tests"
)
func TestTxData_chainID(t *testing.T) {
@ -38,26 +35,49 @@ func TestTxData_chainID(t *testing.T) {
}
func TestTxData_DeriveChainID(t *testing.T) {
bitLen64, ok := new(big.Int).SetString("0x8000000000000000", 0)
require.True(t, ok)
bitLen80, ok := new(big.Int).SetString("0x80000000000000000000", 0)
require.True(t, ok)
expBitLen80, ok := new(big.Int).SetString("302231454903657293676526", 0)
require.True(t, ok)
testCases := []struct {
msg string
data TxData
expChainID *big.Int
from common.Address
}{
{
"v = 0", &AccessListTx{V: big.NewInt(0).Bytes()}, nil, tests.GenerateAddress(),
"v = -1", &LegacyTx{V: big.NewInt(-1).Bytes()}, nil,
},
{
"v = 1", &AccessListTx{V: big.NewInt(1).Bytes()}, big.NewInt(9223372036854775791), tests.GenerateAddress(),
"v = 0", &LegacyTx{V: big.NewInt(0).Bytes()}, nil,
},
{
"v = 27", &AccessListTx{V: big.NewInt(27).Bytes()}, new(big.Int), tests.GenerateAddress(),
"v = 1", &LegacyTx{V: big.NewInt(1).Bytes()}, nil,
},
{
"v = 28", &AccessListTx{V: big.NewInt(28).Bytes()}, new(big.Int), tests.GenerateAddress(),
"v = 27", &LegacyTx{V: big.NewInt(27).Bytes()}, new(big.Int),
},
{
"v = nil ", &AccessListTx{V: nil}, nil, tests.GenerateAddress(),
"v = 28", &LegacyTx{V: big.NewInt(28).Bytes()}, new(big.Int),
},
{
"Ethereum mainnet", &LegacyTx{V: big.NewInt(37).Bytes()}, big.NewInt(1),
},
{
"chain ID 9000", &LegacyTx{V: big.NewInt(18035).Bytes()}, big.NewInt(9000),
},
{
"bit len 64", &LegacyTx{V: bitLen64.Bytes()}, big.NewInt(4611686018427387886),
},
{
"bit len 80", &LegacyTx{V: bitLen80.Bytes()}, expBitLen80,
},
{
"v = nil ", &LegacyTx{V: nil}, nil,
},
}