diff --git a/ethclient/ethclient.go b/ethclient/ethclient.go index 4981177279cb..796e7a75616a 100644 --- a/ethclient/ethclient.go +++ b/ethclient/ethclient.go @@ -473,6 +473,38 @@ func (ec *Client) SuggestGasTipCap(ctx context.Context) (*big.Int, error) { return (*big.Int)(&hex), nil } +type feeHistoryResultMarshaling struct { + OldestBlock *hexutil.Big `json:"oldestBlock"` + Reward [][]*hexutil.Big `json:"reward,omitempty"` + BaseFee []*hexutil.Big `json:"baseFeePerGas,omitempty"` + GasUsedRatio []float64 `json:"gasUsedRatio"` +} + +// FeeHistory retrieves the fee market history. +func (ec *Client) FeeHistory(ctx context.Context, blockCount uint64, lastBlock *big.Int, rewardPercentiles []float64) (*ethereum.FeeHistory, error) { + var res feeHistoryResultMarshaling + if err := ec.c.CallContext(ctx, &res, "eth_feeHistory", hexutil.Uint(blockCount), toBlockNumArg(lastBlock), rewardPercentiles); err != nil { + return nil, err + } + reward := make([][]*big.Int, len(res.Reward)) + for i, r := range res.Reward { + reward[i] = make([]*big.Int, len(r)) + for j, r := range r { + reward[i][j] = (*big.Int)(r) + } + } + baseFee := make([]*big.Int, len(res.BaseFee)) + for i, b := range res.BaseFee { + baseFee[i] = (*big.Int)(b) + } + return ðereum.FeeHistory{ + OldestBlock: (*big.Int)(res.OldestBlock), + Reward: reward, + BaseFee: baseFee, + GasUsedRatio: res.GasUsedRatio, + }, nil +} + // EstimateGas tries to estimate the gas needed to execute a specific transaction based on // the current pending state of the backend blockchain. There is no guarantee that this is // the true gas limit requirement as other transactions may be added or removed by miners, diff --git a/interfaces.go b/interfaces.go index 74325fbe20a7..52143258026d 100644 --- a/interfaces.go +++ b/interfaces.go @@ -183,6 +183,15 @@ type GasPricer interface { SuggestGasPrice(ctx context.Context) (*big.Int, error) } +// FeeHistory provides recent fee market data that consumers can use to determine +// a reasonable maxPriorityFeePerGas value. +type FeeHistory struct { + OldestBlock *big.Int // block coresponding to first response value + Reward [][]*big.Int // list every txs priority fee per block + BaseFee []*big.Int // list of each block's base fee + GasUsedRatio []float64 // ratio of gas used out of the total available limit +} + // A PendingStateReader provides access to the pending state, which is the result of all // known executable transactions which have not yet been included in the blockchain. It is // commonly used to display the result of ’unconfirmed’ actions (e.g. wallet value diff --git a/internal/ethapi/api.go b/internal/ethapi/api.go index 57ad31149f30..36d27bd44621 100644 --- a/internal/ethapi/api.go +++ b/internal/ethapi/api.go @@ -109,6 +109,7 @@ type feeHistoryResult struct { GasUsedRatio []float64 `json:"gasUsedRatio"` } +// FeeHistory returns the fee market history. func (s *PublicEthereumAPI) FeeHistory(ctx context.Context, blockCount hexutil.Uint, lastBlock rpc.BlockNumber, rewardPercentiles []float64) (*feeHistoryResult, error) { oldest, reward, baseFee, gasUsed, err := s.b.FeeHistory(ctx, int(blockCount), lastBlock, rewardPercentiles) if err != nil {