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core/vm: fix gas computation post-osaka

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This commit is contained in:
MariusVanDerWijden 2025-09-02 10:21:41 +02:00
parent 72c390d3c5
commit d456785bd4
1 changed files with 13 additions and 5 deletions
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18
core/vm/contracts.go
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@ -497,6 +497,9 @@ func calculateIterationCount(expLen uint64, expHead uint256.Int, multiplier uint
func byzantiumGasCalc(baseLen, expLen, modLen uint64, expHead uint256.Int) uint64 {
maxLen := max(baseLen, modLen)
multComplexity := byzantiumMultComplexity(maxLen)
if multComplexity == math.MaxUint64 {
return math.MaxUint64
}
iterationCount := calculateIterationCount(expLen, expHead, byzantiumMultiplier)
// Calculate gas: (multComplexity * iterationCount) / byzantiumDivisor
@ -512,6 +515,9 @@ func byzantiumGasCalc(baseLen, expLen, modLen uint64, expHead uint256.Int) uint6
func berlinGasCalc(baseLen, expLen, modLen uint64, expHead uint256.Int) uint64 {
maxLen := max(baseLen, modLen)
multComplexity := berlinMultComplexity(maxLen)
if multComplexity == math.MaxUint64 {
return math.MaxUint64
}
iterationCount := calculateIterationCount(expLen, expHead, berlinMultiplier)
// Calculate gas: (multComplexity * iterationCount) / berlinDivisor
@ -528,11 +534,13 @@ func berlinGasCalc(baseLen, expLen, modLen uint64, expHead uint256.Int) uint64 {
func osakaGasCalc(baseLen, expLen, modLen uint64, expHead uint256.Int) uint64 {
maxLen := max(baseLen, modLen)
multComplexity := osakaMultComplexity(maxLen)
if multComplexity == math.MaxUint64 {
return math.MaxUint64
}
iterationCount := calculateIterationCount(expLen, expHead, osakaMultiplier)
// Calculate gas: (multComplexity * iterationCount) / osakaDivisor
carry, gas := bits.Mul64(iterationCount, multComplexity)
gas /= osakaDivisor
if carry != 0 {
return math.MaxUint64
}
@ -608,14 +616,14 @@ func (c *bigModExp) Run(input []byte) ([]byte, error) {
} else {
input = input[:0]
}
// Handle a special case when both the base and mod length is zero
if baseLen == 0 && modLen == 0 {
return []byte{}, nil
}
// enforce size cap for inputs
if c.eip7823 && max(baseLen, expLen, modLen) > 1024 {
return nil, fmt.Errorf("one or more of base/exponent/modulus length exceeded 1024 bytes")
}
// Handle a special case when both the base and mod length is zero
if baseLen == 0 && modLen == 0 {
return []byte{}, nil
}
// Retrieve the operands and execute the exponentiation
var (
base = new(big.Int).SetBytes(getData(input, 0, baseLen))