mirror of
https://github.com/scroll-tech/scroll.git
synced 2026-01-14 08:28:02 -05:00
66 lines
1.8 KiB
Go
66 lines
1.8 KiB
Go
package utils
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import (
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"fmt"
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"math/big"
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"github.com/scroll-tech/go-ethereum/accounts/abi"
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"github.com/scroll-tech/go-ethereum/common"
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"github.com/scroll-tech/go-ethereum/core/types"
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"github.com/scroll-tech/go-ethereum/crypto"
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bridgeAbi "scroll-tech/bridge/abi"
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)
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// Keccak2 compute the keccack256 of two concatenations of bytes32
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func Keccak2(a common.Hash, b common.Hash) common.Hash {
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return common.BytesToHash(crypto.Keccak256(append(a.Bytes()[:], b.Bytes()[:]...)))
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}
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// ComputeMessageHash compute the message hash
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func ComputeMessageHash(
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sender common.Address,
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target common.Address,
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value *big.Int,
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messageNonce *big.Int,
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message []byte,
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) common.Hash {
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data, _ := bridgeAbi.L2ScrollMessengerABI.Pack("relayMessage", sender, target, value, messageNonce, message)
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return common.BytesToHash(crypto.Keccak256(data))
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}
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// BufferToUint256Le convert bytes array to uint256 array assuming little-endian
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func BufferToUint256Le(buffer []byte) []*big.Int {
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buffer256 := make([]*big.Int, len(buffer)/32)
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for i := 0; i < len(buffer)/32; i++ {
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v := big.NewInt(0)
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shft := big.NewInt(1)
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for j := 0; j < 32; j++ {
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v = new(big.Int).Add(v, new(big.Int).Mul(shft, big.NewInt(int64(buffer[i*32+j]))))
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shft = new(big.Int).Mul(shft, big.NewInt(256))
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}
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buffer256[i] = v
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}
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return buffer256
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}
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// UnpackLog unpacks a retrieved log into the provided output structure.
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// @todo: add unit test.
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func UnpackLog(c *abi.ABI, out interface{}, event string, log types.Log) error {
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if log.Topics[0] != c.Events[event].ID {
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return fmt.Errorf("event signature mismatch")
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}
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if len(log.Data) > 0 {
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if err := c.UnpackIntoInterface(out, event, log.Data); err != nil {
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return err
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}
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}
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var indexed abi.Arguments
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for _, arg := range c.Events[event].Inputs {
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if arg.Indexed {
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indexed = append(indexed, arg)
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}
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}
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return abi.ParseTopics(out, indexed, log.Topics[1:])
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}
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