ethereum, ethclient: add FeeHistory support (#25403)
Co-authored-by: Felix Lange <fjl@twurst.com>
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@ -505,6 +505,38 @@ func (ec *Client) SuggestGasTipCap(ctx context.Context) (*big.Int, error) {
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return (*big.Int)(&hex), nil
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}
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type feeHistoryResultMarshaling struct {
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OldestBlock *hexutil.Big `json:"oldestBlock"`
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Reward [][]*hexutil.Big `json:"reward,omitempty"`
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BaseFee []*hexutil.Big `json:"baseFeePerGas,omitempty"`
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GasUsedRatio []float64 `json:"gasUsedRatio"`
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}
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// FeeHistory retrieves the fee market history.
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func (ec *Client) FeeHistory(ctx context.Context, blockCount uint64, lastBlock *big.Int, rewardPercentiles []float64) (*ethereum.FeeHistory, error) {
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var res feeHistoryResultMarshaling
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if err := ec.c.CallContext(ctx, &res, "eth_feeHistory", hexutil.Uint(blockCount), toBlockNumArg(lastBlock), rewardPercentiles); err != nil {
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return nil, err
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}
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reward := make([][]*big.Int, len(res.Reward))
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for i, r := range res.Reward {
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reward[i] = make([]*big.Int, len(r))
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for j, r := range r {
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reward[i][j] = (*big.Int)(r)
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}
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}
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baseFee := make([]*big.Int, len(res.BaseFee))
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for i, b := range res.BaseFee {
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baseFee[i] = (*big.Int)(b)
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}
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return ðereum.FeeHistory{
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OldestBlock: (*big.Int)(res.OldestBlock),
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Reward: reward,
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BaseFee: baseFee,
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GasUsedRatio: res.GasUsedRatio,
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}, nil
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}
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// EstimateGas tries to estimate the gas needed to execute a specific transaction based on
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// the current pending state of the backend blockchain. There is no guarantee that this is
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// the true gas limit requirement as other transactions may be added or removed by miners,
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@ -508,6 +508,29 @@ func testStatusFunctions(t *testing.T, client *rpc.Client) {
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if gasTipCap.Cmp(big.NewInt(234375000)) != 0 {
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t.Fatalf("unexpected gas tip cap: %v", gasTipCap)
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}
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// FeeHistory
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history, err := ec.FeeHistory(context.Background(), 1, big.NewInt(2), []float64{95, 99})
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if err != nil {
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t.Fatalf("unexpected error: %v", err)
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}
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want := ðereum.FeeHistory{
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OldestBlock: big.NewInt(2),
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Reward: [][]*big.Int{
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{
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big.NewInt(234375000),
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big.NewInt(234375000),
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},
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},
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BaseFee: []*big.Int{
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big.NewInt(765625000),
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big.NewInt(671627818),
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},
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GasUsedRatio: []float64{0.008912678667376286},
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}
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if !reflect.DeepEqual(history, want) {
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t.Fatalf("FeeHistory result doesn't match expected: (got: %v, want: %v)", history, want)
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}
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}
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func testCallContractAtHash(t *testing.T, client *rpc.Client) {
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@ -201,6 +201,15 @@ type GasPricer interface {
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SuggestGasPrice(ctx context.Context) (*big.Int, error)
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}
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// FeeHistory provides recent fee market data that consumers can use to determine
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// a reasonable maxPriorityFeePerGas value.
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type FeeHistory struct {
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OldestBlock *big.Int // block coresponding to first response value
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Reward [][]*big.Int // list every txs priority fee per block
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BaseFee []*big.Int // list of each block's base fee
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GasUsedRatio []float64 // ratio of gas used out of the total available limit
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}
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// A PendingStateReader provides access to the pending state, which is the result of all
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// known executable transactions which have not yet been included in the blockchain. It is
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// commonly used to display the result of ’unconfirmed’ actions (e.g. wallet value
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@ -86,6 +86,7 @@ type feeHistoryResult struct {
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GasUsedRatio []float64 `json:"gasUsedRatio"`
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}
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// FeeHistory returns the fee market history.
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func (s *EthereumAPI) FeeHistory(ctx context.Context, blockCount rpc.DecimalOrHex, lastBlock rpc.BlockNumber, rewardPercentiles []float64) (*feeHistoryResult, error) {
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oldest, reward, baseFee, gasUsed, err := s.b.FeeHistory(ctx, int(blockCount), lastBlock, rewardPercentiles)
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if err != nil {
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