forks/go-ethereum
1
0
Fork 1
mirror of https://github.com/ethereum/go-ethereum.git synced 2026-02-26 15:47:21 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 1

core/vm: implement eip 7883 (modexp repricing)

Browse source
This commit is contained in:
Jared Wasinger 2025-04-10 22:15:26 +08:00 committed by MariusVanDerWijden
parent 6b3c85964e
commit e8d13ca9fb
2 changed files with 14 additions and 4 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

16
core/vm/contracts.go
View file

@ -317,6 +317,7 @@ func (c *dataCopy) Run(in []byte) ([]byte, error) {
// bigModExp implements a native big integer exponential modular operation.
type bigModExp struct {
eip2565 bool
eip7883 bool
}
var (
@ -402,6 +403,7 @@ func (c *bigModExp) RequiredGas(input []byte) uint64 {
} else {
gas.Set(modLen)
}
maxLen := new(big.Int).Set(gas)
if c.eip2565 {
// EIP-2565 has three changes
// 1. Different multComplexity (inlined here)
@ -415,6 +417,14 @@ func (c *bigModExp) RequiredGas(input []byte) uint64 {
gas.Rsh(gas, 3)
gas.Mul(gas, gas)
var minPrice uint64 = 200
if c.eip7883 {
minPrice = 500
if maxLen.Cmp(big32) > 0 {
gas.Mul(gas, big.NewInt(2))
}
}
if adjExpLen.Cmp(big1) > 0 {
gas.Mul(gas, adjExpLen)
}
@ -423,9 +433,9 @@ func (c *bigModExp) RequiredGas(input []byte) uint64 {
if gas.BitLen() > 64 {
return math.MaxUint64
}
// 3. Minimum price of 200 gas
if gas.Uint64() < 200 {
return 200
if gas.Uint64() < minPrice {
return minPrice
}
return gas.Uint64()
}

2
tests/testdata

@ -1 +1 @@
Subproject commit 81862e4848585a438d64f911a19b3825f0f4cd95
Subproject commit faf33b471465d3c6cdc3d04fbd690895f78d33f2