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* basic sbundle * sbundle pool * sbundle api * local builder * move sim bundle to core * working builder * db for sbundles * report sbundle stat * mev_simBundle nested logs * refundConfig * pay kickback from refundable value * lints * percentof * sbundle pool with separate lock * don't wait for error when adding sbundle
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,140 @@ | ||
| package core | ||
|
|
||
| import ( | ||
| "errors" | ||
| "math/big" | ||
|
|
||
| "github.com/ethereum/go-ethereum/common" | ||
| "github.com/ethereum/go-ethereum/core/state" | ||
| "github.com/ethereum/go-ethereum/core/types" | ||
| "github.com/ethereum/go-ethereum/core/vm" | ||
| "github.com/ethereum/go-ethereum/params" | ||
| ) | ||
|
|
||
| var ( | ||
| ErrInvalidInclusion = errors.New("invalid inclusion") | ||
|
|
||
| ErrTxFailed = errors.New("tx failed") | ||
| ErrNegativeProfit = errors.New("negative profit") | ||
| ErrInvalidBundle = errors.New("invalid bundle") | ||
|
|
||
| SbundlePayoutMaxCostInt uint64 = 30_000 | ||
| SbundlePayoutMaxCost = big.NewInt(30_000) | ||
| ) | ||
|
|
||
| type SimBundleResult struct { | ||
| TotalProfit *big.Int | ||
| RefundableValue *big.Int | ||
| GasUsed uint64 | ||
| MevGasPrice *big.Int | ||
| BodyLogs []SimBundleBodyLogs | ||
| } | ||
|
|
||
| type SimBundleBodyLogs struct { | ||
| TxLogs []*types.Log `json:"txLogs,omitempty"` | ||
| BundleLogs []SimBundleBodyLogs `json:"bundleLogs,omitempty"` | ||
| } | ||
|
|
||
| func NewSimBundleResult() SimBundleResult { | ||
| return SimBundleResult{ | ||
| TotalProfit: big.NewInt(0), | ||
| RefundableValue: big.NewInt(0), | ||
| GasUsed: 0, | ||
| MevGasPrice: big.NewInt(0), | ||
| BodyLogs: nil, | ||
| } | ||
| } | ||
|
|
||
| func SimBundle(chainConfig *params.ChainConfig, chain *BlockChain, gp *GasPool, statedb *state.StateDB, header *types.Header, b *types.SBundle, logs bool) (SimBundleResult, error) { | ||
| res := NewSimBundleResult() | ||
|
|
||
| currBlock := header.Number.Uint64() | ||
| if currBlock < b.Inclusion.BlockNumber || currBlock > b.Inclusion.MaxBlockNumber { | ||
| return res, ErrInvalidInclusion | ||
| } | ||
|
|
||
| // extract constraints into convenient format | ||
| refundIdx := make([]bool, len(b.Body)) | ||
| refundPercents := make([]int, len(b.Body)) | ||
| for _, el := range b.Validity.Refund { | ||
| refundIdx[el.BodyIdx] = true | ||
| refundPercents[el.BodyIdx] = el.Percent | ||
| } | ||
|
|
||
| var ( | ||
| coinbaseDelta = new(big.Int) | ||
| coinbaseBefore *big.Int | ||
| ) | ||
| for i, el := range b.Body { | ||
| coinbaseDelta.Set(common.Big0) | ||
| coinbaseBefore = statedb.GetBalance(header.Coinbase) | ||
|
|
||
| if el.Tx != nil { | ||
| vmconfig := vm.Config{} | ||
| receipt, err := ApplyTransaction(chainConfig, chain, &header.Coinbase, gp, statedb, header, el.Tx, &header.GasUsed, vmconfig, nil) | ||
| if err != nil { | ||
| return res, err | ||
| } | ||
| if receipt.Status != types.ReceiptStatusSuccessful && !el.CanRevert { | ||
| return res, ErrTxFailed | ||
| } | ||
| res.GasUsed += receipt.GasUsed | ||
| if logs { | ||
| res.BodyLogs = append(res.BodyLogs, SimBundleBodyLogs{TxLogs: receipt.Logs}) | ||
| } | ||
| } else if el.Bundle != nil { | ||
| innerRes, err := SimBundle(chainConfig, chain, gp, statedb, header, el.Bundle, logs) | ||
| if err != nil { | ||
| return res, err | ||
| } | ||
| res.GasUsed += innerRes.GasUsed | ||
| if logs { | ||
| res.BodyLogs = append(res.BodyLogs, SimBundleBodyLogs{BundleLogs: innerRes.BodyLogs}) | ||
| } | ||
| } else { | ||
| return res, ErrInvalidBundle | ||
| } | ||
|
|
||
| coinbaseDelta.Set(statedb.GetBalance(header.Coinbase)) | ||
| coinbaseDelta.Sub(coinbaseDelta, coinbaseBefore) | ||
|
|
||
| res.TotalProfit.Add(res.TotalProfit, coinbaseDelta) | ||
| if !refundIdx[i] { | ||
| res.RefundableValue.Add(res.RefundableValue, coinbaseDelta) | ||
| } | ||
| } | ||
|
|
||
| // estimate payout value and subtract from total profit | ||
| signer := types.MakeSigner(chainConfig, header.Number) | ||
| for i, el := range refundPercents { | ||
| if !refundIdx[i] { | ||
| continue | ||
| } | ||
| // we pay tx cost out of the refundable value | ||
|
|
||
| // cost | ||
| refundConfig, err := types.GetRefundConfig(&b.Body[i], signer) | ||
| if err != nil { | ||
| return res, err | ||
| } | ||
| payoutTxFee := new(big.Int).Mul(header.BaseFee, SbundlePayoutMaxCost) | ||
| payoutTxFee.Mul(payoutTxFee, new(big.Int).SetInt64(int64(len(refundConfig)))) | ||
| res.GasUsed += SbundlePayoutMaxCost.Uint64() * uint64(len(refundConfig)) | ||
|
|
||
| // allocated refundable value | ||
| payoutValue := common.PercentOf(res.RefundableValue, el) | ||
|
|
||
| if payoutTxFee.Cmp(payoutValue) > 0 { | ||
| return res, ErrNegativeProfit | ||
| } | ||
|
|
||
| res.TotalProfit.Sub(res.TotalProfit, payoutValue) | ||
| } | ||
|
|
||
| if res.TotalProfit.Sign() < 0 { | ||
| res.TotalProfit.Set(common.Big0) | ||
| return res, ErrNegativeProfit | ||
| } | ||
| res.MevGasPrice.Div(res.TotalProfit, new(big.Int).SetUint64(res.GasUsed)) | ||
| return res, nil | ||
| } |
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