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contract.go
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contract.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 ethcall
import (
"encoding/hex"
"errors"
"strconv"
"code.vegaprotocol.io/vega/libs/crypto"
vegapb "code.vegaprotocol.io/vega/protos/vega"
)
type ContractCallEvent struct {
BlockHeight uint64
BlockTime uint64
SpecId string
Result []byte
Error *string
SourceChainID *uint64
Heartbeat bool
}
func EthereumContractCallResultFromProto(
qr *vegapb.EthContractCallEvent,
) (ContractCallEvent, error) {
res := ContractCallEvent{
SpecId: qr.SpecId,
BlockHeight: qr.BlockHeight,
BlockTime: qr.BlockTime,
Result: qr.Result,
Error: qr.Error,
SourceChainID: qr.SourceChainId,
Heartbeat: qr.Heartbeat,
}
if qr.BlockHeight == 0 || qr.BlockTime <= 0 {
return ContractCallEvent{}, errors.New("invalid contract call payload")
}
if qr.Heartbeat {
return res, nil
}
if (len(qr.Result) <= 0 && qr.Error == nil) || len(qr.SpecId) <= 0 {
return ContractCallEvent{}, errors.New("invalid contract call payload")
}
return res, nil
}
func (q *ContractCallEvent) IntoProto() *vegapb.EthContractCallEvent {
return &vegapb.EthContractCallEvent{
SpecId: q.SpecId,
BlockHeight: q.BlockHeight,
BlockTime: q.BlockTime,
Result: q.Result,
Error: q.Error,
SourceChainId: q.SourceChainID,
Heartbeat: q.Heartbeat,
}
}
func (q ContractCallEvent) Hash() string {
blockHeight := strconv.FormatUint(q.BlockHeight, 10)
blockTime := strconv.FormatUint(q.BlockTime, 10)
bytes := []byte(blockHeight + blockTime + q.SpecId)
bytes = append(bytes, q.Result...)
if q.Error != nil {
bytes = append(bytes, []byte(*q.Error)...)
}
if q.Heartbeat {
// only append if its true so that old events pre this flag existing hash to the same value
strconv.AppendBool(bytes, q.Heartbeat)
}
return hex.EncodeToString(
crypto.Hash(bytes),
)
}