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erc20_common.go
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erc20_common.go
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// Copyright (C) 2023 Gobalsky Labs Limited
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// This program 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 Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package bridges
import (
"encoding/hex"
"fmt"
"code.vegaprotocol.io/vega/core/nodewallets/eth/clef"
"github.com/ethereum/go-ethereum/accounts/abi"
ethcmn "github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/crypto"
)
type Signer interface {
Sign([]byte) ([]byte, error)
Algo() string
}
type SignaturePayload struct {
Message Bytes
Signature Bytes
}
type Bytes []byte
func (b Bytes) Bytes() []byte {
return b
}
func (b Bytes) Hex() string {
return hex.EncodeToString(b)
}
func packBufAndSubmitter(
buf []byte, submitter string,
) ([]byte, error) {
typBytes, err := abi.NewType("bytes", "", nil)
if err != nil {
return nil, err
}
typAddr, err := abi.NewType("address", "", nil)
if err != nil {
return nil, err
}
submitterAddr := ethcmn.HexToAddress(submitter)
args2 := abi.Arguments([]abi.Argument{
{
Name: "bytes",
Type: typBytes,
},
{
Name: "address",
Type: typAddr,
},
})
return args2.Pack(buf, submitterAddr)
}
func sign(signer Signer, msg []byte) (*SignaturePayload, error) {
var sig []byte
var err error
if signer.Algo() == clef.ClefAlgoType {
sig, err = signer.Sign(msg)
} else {
// hash our message before signing it
hash := crypto.Keccak256(msg)
sig, err = signer.Sign(hash)
}
if err != nil {
return nil, fmt.Errorf("could not sign message with ethereum wallet: %w", err)
}
return &SignaturePayload{
Message: msg,
Signature: sig,
}, nil
}