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feat(taiko-client): introduce
TxBuilderWithFallback
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164 changes: 164 additions & 0 deletions
164
packages/taiko-client/proposer/transaction_builder/fallback.go
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,164 @@ | ||
| package builder | ||
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||
| import ( | ||
| "context" | ||
| "crypto/ecdsa" | ||
| "fmt" | ||
| "math/big" | ||
|
|
||
| "github.com/ethereum-optimism/optimism/op-service/txmgr" | ||
| "github.com/ethereum/go-ethereum" | ||
| "github.com/ethereum/go-ethereum/common" | ||
| "github.com/ethereum/go-ethereum/log" | ||
| "github.com/taikoxyz/taiko-mono/packages/taiko-client/pkg/config" | ||
| "github.com/taikoxyz/taiko-mono/packages/taiko-client/pkg/rpc" | ||
| "github.com/taikoxyz/taiko-mono/packages/taiko-client/pkg/utils" | ||
| ) | ||
|
|
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| // TxBuilderWithFallback builds type-2 or type-3 transactions based on the | ||
| // the realtime onchain cost, if the fallback feature is enabled. | ||
| type TxBuilderWithFallback struct { | ||
| rpc *rpc.Client | ||
| blobTransactionBuilder *BlobTransactionBuilder | ||
| calldataTransactionBuilder *CalldataTransactionBuilder | ||
| txmgrSelector *utils.TxMgrSelector | ||
| fallback bool | ||
| } | ||
|
|
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| // NewBuilderWithFallback creates a new TxBuilderWithFallback instance. | ||
| func NewBuilderWithFallback( | ||
| rpc *rpc.Client, | ||
| proposerPrivateKey *ecdsa.PrivateKey, | ||
| l2SuggestedFeeRecipient common.Address, | ||
| taikoL1Address common.Address, | ||
| proverSetAddress common.Address, | ||
| gasLimit uint64, | ||
| extraData string, | ||
| chainConfig *config.ChainConfig, | ||
| txmgrSelector *utils.TxMgrSelector, | ||
| revertProtectionEnabled bool, | ||
| blobAllowed bool, | ||
| fallback bool, | ||
| ) *TxBuilderWithFallback { | ||
| builder := &TxBuilderWithFallback{ | ||
| rpc: rpc, | ||
| fallback: fallback, | ||
| txmgrSelector: txmgrSelector, | ||
| } | ||
|
|
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| if blobAllowed { | ||
| builder.blobTransactionBuilder = NewBlobTransactionBuilder( | ||
| rpc, | ||
| proposerPrivateKey, | ||
| taikoL1Address, | ||
| proverSetAddress, | ||
| l2SuggestedFeeRecipient, | ||
| gasLimit, | ||
| extraData, | ||
| chainConfig, | ||
| revertProtectionEnabled, | ||
| ) | ||
| } | ||
|
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| builder.calldataTransactionBuilder = NewCalldataTransactionBuilder( | ||
| rpc, | ||
| proposerPrivateKey, | ||
| l2SuggestedFeeRecipient, | ||
| taikoL1Address, | ||
| proverSetAddress, | ||
| gasLimit, | ||
| extraData, | ||
| chainConfig, | ||
| revertProtectionEnabled, | ||
| ) | ||
|
|
||
| return builder | ||
| } | ||
|
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| // BuildOntake builds a type-2 or type-3 transaction based on the | ||
| // the realtime onchain cost, if the fallback feature is enabled. | ||
| func (b *TxBuilderWithFallback) BuildOntake( | ||
| ctx context.Context, | ||
| txListBytesArray [][]byte, | ||
| ) (*txmgr.TxCandidate, error) { | ||
| // If calldata is the only option, just use it. | ||
| if b.blobTransactionBuilder == nil { | ||
| return b.calldataTransactionBuilder.BuildOntake(ctx, txListBytesArray) | ||
| } | ||
| // If blob is enabled, and fallback is not enabled, just build a blob transaction. | ||
| if !b.fallback { | ||
| return b.blobTransactionBuilder.BuildOntake(ctx, txListBytesArray) | ||
| } | ||
| // Otherwise, compare the cost, and choose the cheaper option. | ||
| txWithCalldata, err := b.calldataTransactionBuilder.BuildOntake(ctx, txListBytesArray) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| txWithBlob, err := b.blobTransactionBuilder.BuildOntake(ctx, txListBytesArray) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
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| costCalldata, err := b.estimateCandidateCost(ctx, txWithCalldata) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| costBlob, err := b.estimateCandidateCost(ctx, txWithBlob) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
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| if costCalldata.Cmp(costBlob) < 1 { | ||
| log.Info("Building a type-2 transaction", "costCalldata", costCalldata, "costBlob", costBlob) | ||
| return txWithCalldata, nil | ||
| } | ||
|
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| log.Info("Building a type-3 transaction", "costCalldata", costCalldata, "costBlob", costBlob) | ||
| return txWithBlob, nil | ||
| } | ||
|
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| // estimateCandidateCost estimates the realtime onchain cost of the given transaction. | ||
| func (b *TxBuilderWithFallback) estimateCandidateCost( | ||
| ctx context.Context, | ||
| candidate *txmgr.TxCandidate, | ||
| ) (*big.Int, error) { | ||
| txmgr, _ := b.txmgrSelector.Select() | ||
| gasTipCap, baseFee, blobBaseFee, err := txmgr.SuggestGasPriceCaps(ctx) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| log.Info("Suggested gas price", "gasTipCap", gasTipCap, "baseFee", baseFee, "blobBaseFee", blobBaseFee) | ||
|
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| gasPrice := new(big.Int).Add(baseFee, gasTipCap) | ||
| gasUsed, err := b.rpc.L1.EstimateGas(ctx, ethereum.CallMsg{ | ||
| From: txmgr.From(), | ||
| To: candidate.To, | ||
| Gas: candidate.GasLimit, | ||
| GasPrice: gasPrice, | ||
| GasFeeCap: gasPrice, | ||
| GasTipCap: gasTipCap, | ||
| Value: candidate.Value, | ||
| Data: candidate.TxData, | ||
| }) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("failed to estimate gas used: %w", err) | ||
| } | ||
|
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| feeWithoutBlob := new(big.Int).Mul(gasPrice, new(big.Int).SetUint64(gasUsed)) | ||
|
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| // If its a type-2 transaction, we won't calculate blob fee. | ||
| if len(candidate.Blobs) == 0 { | ||
| return feeWithoutBlob, nil | ||
| } | ||
|
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| // Otherwise, we add blob fee to the cost. | ||
| return new(big.Int).Add( | ||
| feeWithoutBlob, | ||
| new(big.Int).Mul(new(big.Int).SetUint64(uint64(len(candidate.Blobs))), blobBaseFee), | ||
| ), nil | ||
| } | ||
|
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| // TxBuilderWithFallback returns whether the blob transactions is enabled. | ||
| func (b *TxBuilderWithFallback) BlobAllow() bool { | ||
| return b.blobTransactionBuilder != nil | ||
| } |