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package oracle
import (
"context"
"fmt"
"github.com/ethereum-optimism/optimism/go/gas-oracle/bindings"
"github.com/ethereum/go-ethereum/accounts/abi/bind"
"github.com/ethereum/go-ethereum/common/hexutil"
"github.com/ethereum/go-ethereum/log"
)
func wrapUpdateBaseFee(l1Backend bind.ContractTransactor, l2Backend DeployContractBackend, cfg *Config) (func() error, error) {
if cfg.privateKey == nil {
return nil, errNoPrivateKey
}
if cfg.l2ChainID == nil {
return nil, errNoChainID
}
opts, err := bind.NewKeyedTransactorWithChainID(cfg.privateKey, cfg.l2ChainID)
if err != nil {
return nil, err
}
// Once https://github.com/ethereum/go-ethereum/pull/23062 is released
// then we can remove setting the context here
if opts.Context == nil {
opts.Context = context.Background()
}
// Don't send the transaction using the `contract` so that we can inspect
// it beforehand
opts.NoSend = true
// Create a new contract bindings in scope of the updateL2GasPriceFn
// that is returned from this function
contract, err := bindings.NewGasPriceOracle(cfg.gasPriceOracleAddress, l2Backend)
if err != nil {
return nil, err
}
return func() error {
baseFee, err := contract.L1BaseFee(&bind.CallOpts{
Context: context.Background(),
})
tip, err := l1Backend.HeaderByNumber(context.Background(), nil)
if err != nil {
return err
}
if tip.BaseFee == nil {
return errNoBaseFee
}
if !isDifferenceSignificant(baseFee.Uint64(), tip.BaseFee.Uint64(), cfg.l1BaseFeeSignificanceFactor) {
log.Debug("non significant base fee update", "tip", tip.BaseFee, "current", baseFee)
return nil
}
tx, err := contract.SetL1BaseFee(opts, tip.BaseFee)
if err != nil {
return err
}
log.Debug("updating L1 base fee", "tx.gasPrice", tx.GasPrice(), "tx.gasLimit", tx.Gas(),
"tx.data", hexutil.Encode(tx.Data()), "tx.to", tx.To().Hex(), "tx.nonce", tx.Nonce())
if err := l2Backend.SendTransaction(context.Background(), tx); err != nil {
return fmt.Errorf("cannot update base fee: %w", err)
}
log.Info("L1 base fee transaction sent", "hash", tx.Hash().Hex())
if cfg.waitForReceipt {
// Wait for the receipt
receipt, err := waitForReceipt(l2Backend, tx)
if err != nil {
return err
}
log.Info("base-fee transaction confirmed", "hash", tx.Hash().Hex(),
"gas-used", receipt.GasUsed, "blocknumber", receipt.BlockNumber)
}
return nil
}, nil
}