consensus/misc/eip1559/eip1559.go

Type	MOD
Upstream Lines	102
Changed	+4 -0

Disable EIP-1559 base fee for ETC

diff --git a/consensus/misc/eip1559/eip1559.go b/consensus/misc/eip1559/eip1559.go
index 9a4cd320a..245fa483c 100644
--- a/consensus/misc/eip1559/eip1559.go
+++ b/consensus/misc/eip1559/eip1559.go
@@ -62,6 +62,10 @@ func CalcBaseFee(config *params.ChainConfig, parent *types.Header) *big.Int {
    if !config.IsLondon(parent.Number) {
        return new(big.Int).SetUint64(params.InitialBaseFee)
    }
+   // If London is active but EIP-1559 is not (e.g., ETC Mystique), return 0.
+   if !config.IsEIP1559(parent.Number) {
+       return common.Big0
+   }

    parentGasTarget := parent.GasLimit / config.ElasticityMultiplier()
    // If the parent gasUsed is the same as the target, the baseFee remains unchanged.

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