From 1c7899df35df41a422142da523a4f1ec31ad8e4d Mon Sep 17 00:00:00 2001
From: linhaiyang <1183679527@qq.com>
Date: Fri, 6 Aug 2021 15:43:55 +0800
Subject: [PATCH] ethapi add basefee

---
 eth/api.go | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/eth/api.go b/eth/api.go
index 8b96d1f316..11bfd21195 100644
--- a/eth/api.go
+++ b/eth/api.go
@@ -30,6 +30,7 @@ import (
 
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/common/hexutil"
+	"github.com/ethereum/go-ethereum/consensus/misc"
 	"github.com/ethereum/go-ethereum/core"
 	"github.com/ethereum/go-ethereum/core/rawdb"
 	"github.com/ethereum/go-ethereum/core/state"
@@ -56,6 +57,15 @@ func (api *PublicEthereumAPI) Etherbase() (common.Address, error) {
 	return api.e.Etherbase()
 }
 
+// BaseFee for rpc
+func (api *PublicEthereumAPI) BaseFee(ctx context.Context) (*big.Int, error) {
+	header, err := api.e.APIBackend.HeaderByNumber(ctx, rpc.LatestBlockNumber)
+	if err != nil {
+		return nil, err
+	}
+	return misc.CalcBaseFee(api.e.APIBackend.ChainConfig(), header), nil
+}
+
 // Coinbase is the address that mining rewards will be send to (alias for Etherbase)
 func (api *PublicEthereumAPI) Coinbase() (common.Address, error) {
 	return api.Etherbase()