From e2f1b41257aab661819c58f0344137eaec906f4d Mon Sep 17 00:00:00 2001
From: Daniel Liu <liudaniel@qq.com>
Date: Fri, 26 Apr 2024 17:43:05 +0800
Subject: [PATCH] EIP-1559: miner changes (#22896)

---
 core/types/transaction.go | 14 ++++++++++++++
 miner/worker.go           |  3 +++
 2 files changed, 17 insertions(+)

diff --git a/core/types/transaction.go b/core/types/transaction.go
index 5869c9a7e4ee..d7d1ba39ea24 100644
--- a/core/types/transaction.go
+++ b/core/types/transaction.go
@@ -43,6 +43,7 @@ var (
 	errInvalidYParity           = errors.New("'yParity' field must be 0 or 1")
 	errVYParityMismatch         = errors.New("'v' and 'yParity' fields do not match")
 	errVYParityMissing          = errors.New("missing 'yParity' or 'v' field in transaction")
+	ErrFeeCapTooLow             = errors.New("fee cap less than base fee")
 	errEmptyTypedTx             = errors.New("empty typed transaction bytes")
 	errNoSigner                 = errors.New("missing signing methods")
 	skipNonceDestinationAddress = map[common.Address]bool{
@@ -320,6 +321,19 @@ func (tx *Transaction) From() *common.Address {
 	return &from
 }
 
+// EffectiveTip returns the effective miner tip for the given base fee.
+// Returns error in case of a negative effective miner tip.
+func (tx *Transaction) EffectiveTip(baseFee *big.Int) (*big.Int, error) {
+	if baseFee == nil {
+		return tx.Tip(), nil
+	}
+	feeCap := tx.FeeCap()
+	if feeCap.Cmp(baseFee) == -1 {
+		return nil, ErrFeeCapTooLow
+	}
+	return math.BigMin(tx.Tip(), feeCap.Sub(feeCap, baseFee)), nil
+}
+
 // RawSignatureValues returns the V, R, S signature values of the transaction.
 // The return values should not be modified by the caller.
 func (tx *Transaction) RawSignatureValues() (v, r, s *big.Int) {
diff --git a/miner/worker.go b/miner/worker.go
index 0e341636d243..0f5bf7e2a4a3 100644
--- a/miner/worker.go
+++ b/miner/worker.go
@@ -615,6 +615,9 @@ func (self *worker) commitNewWork() {
 		Extra:      self.extra,
 		Time:       big.NewInt(tstamp),
 	}
+	// Set baseFee if we are on an EIP-1559 chain
+	header.BaseFee = misc.CalcBaseFee(self.config, header)
+
 	// Only set the coinbase if we are mining (avoid spurious block rewards)
 	if atomic.LoadInt32(&self.mining) == 1 {
 		header.Coinbase = self.coinbase