save

consensus/misc/eip7783/eip7783.go

@@ -0,0 +1,21 @@
+package eip7783
+
+import "math/big"
+
+/*
+Implementation of EIP-7783:
+
+def compute_gas_limit(blockNum: int, blockNumStart: int, initialGasLimit: int, r: int, gasLimitCap: int) -> int:
+
+	if blockNum < blockNumStart:
+	  return initialGasLimit
+	else:
+	  return min(gasLimitCap, initialGasLimit + r * (blockNum - blockNumStart))
+*/
+func CalcGasLimitEIP7783(blockNum, startBlockNum *big.Int, initialGasLimit, gasIncreaseRate, gasLimitCap uint64) uint64 {
+	if blockNum.Cmp(startBlockNum) < 0 {
+		return initialGasLimit
+	} else {
+		return min(gasLimitCap, initialGasLimit+gasIncreaseRate*(blockNum.Uint64()-startBlockNum.Uint64()))
+	}
+}

consensus/misc/eip7783/eip7783_test.go

@@ -0,0 +1,24 @@
+package eip7783
+
+import (
+	"math/big"
+	"testing"
+)
+
+func TestCalcGasLimitEIP7783Test(t *testing.T) {
+	// Do multiple tests here
+	tests := []struct {
+		blockNum, startBlockNum                                         *big.Int
+		initialGasLimit, gasIncreaseRate, gasLimitCap, expectedGasLimit uint64
+	}{
+		{big.NewInt(100), big.NewInt(50), 100000, 10, 200000, 100500},
+		{big.NewInt(100), big.NewInt(100), 100000, 10, 200000, 100000},
+		{big.NewInt(99), big.NewInt(100), 100000, 10, 200000, 100000},
+	}
+
+	for i, test := range tests {
+		if have, want := CalcGasLimitEIP7783(test.blockNum, test.startBlockNum, test.initialGasLimit, test.gasIncreaseRate, test.gasLimitCap), test.expectedGasLimit; have != want {
+			t.Errorf("test %d: have %d  want %d, ", i, have, want)
+		}
+	}
+}