cerc-io/go-ethereum
18
0
Fork 0
Code Issues 9 Pull Requests Packages Projects Releases 66 Wiki Activity

Patch for concurrent iterator & others (onto v1.11.6) #386

Closed
roysc wants to merge 1565 commits from v1.11.6-statediff-v5 into master
pull from: v1.11.6-statediff-v5
merge into: cerc-io:master
Conversation 0 Commits 1565 Files Changed 1471 +5 -8
1 changed files with 5 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files
Showing only changes of commit 9d795d0836 - Show all commits

13
core/vm/contracts.go
View File

@ -29,6 +29,7 @@ import (
"github.com/ethereum/go-ethereum/crypto/bls12381"
"github.com/ethereum/go-ethereum/crypto/bn256"
"github.com/ethereum/go-ethereum/params"
big2 "github.com/holiman/big"
"golang.org/x/crypto/ripemd160"
)
@ -377,23 +378,19 @@ func (c *bigModExp) Run(input []byte) ([]byte, error) {
}
// Retrieve the operands and execute the exponentiation
var (
base = new(big.Int).SetBytes(getData(input, 0, baseLen))
exp = new(big.Int).SetBytes(getData(input, baseLen, expLen))
mod = new(big.Int).SetBytes(getData(input, baseLen+expLen, modLen))
base = new(big2.Int).SetBytes(getData(input, 0, baseLen))
exp = new(big2.Int).SetBytes(getData(input, baseLen, expLen))
mod = new(big2.Int).SetBytes(getData(input, baseLen+expLen, modLen))
v []byte
)
switch {
case mod.BitLen() == 0:
// Modulo 0 is undefined, return zero
return common.LeftPadBytes([]byte{}, int(modLen)), nil
case base.Cmp(common.Big1) == 0:
case base.BitLen() == 1: // a bit length of 1 means it's 1 (or -1).
//If base == 1, then we can just return base % mod (if mod >= 1, which it is)
v = base.Mod(base, mod).Bytes()
//case mod.Bit(0) == 0:
// // Modulo is even
// v = math.FastExp(base, exp, mod).Bytes()
default:
// Modulo is odd
v = base.Exp(base, exp, mod).Bytes()
}
return common.LeftPadBytes(v, int(modLen)), nil