Update contracts.go

forkfury · web-flow · commit bf2e341a6c4c · 2025-11-05T00:01:20.000+01:00
diff --git a/core/vm/contracts.go b/core/vm/contracts.go
@@ -591,8 +591,11 @@ func (c *bigModExp) RequiredGas(input []byte) uint64 {
 		if expLen > 32 {
 			expHead.SetBytes(getData(input, baseLen, 32))
 		} else {
-			// TODO: Check that if expLen < baseLen, then getData will return an empty slice
-			expHead.SetBytes(getData(input, baseLen, expLen))
+			if expLen < baseLen && uint64(len(input)) < baseLen+expLen {
+				expHead.SetBytes([]byte{})
+			} else {
+				expHead.SetBytes(getData(input, baseLen, expLen))
+			}
 		}
 	}
 

Original file line number	Diff line number	Diff line change
`@@ -591,8 +591,11 @@ func (c *bigModExp) RequiredGas(input []byte) uint64 {`
`591`	`591`	`if expLen > 32 {`
`592`	`592`	`expHead.SetBytes(getData(input, baseLen, 32))`
`593`	`593`	`} else {`
`594`		`- // TODO: Check that if expLen < baseLen, then getData will return an empty slice`
`595`		`- expHead.SetBytes(getData(input, baseLen, expLen))`
	`594`	`+ if expLen < baseLen && uint64(len(input)) < baseLen+expLen {`
	`595`	`+ expHead.SetBytes([]byte{})`
	`596`	`+ } else {`
	`597`	`+ expHead.SetBytes(getData(input, baseLen, expLen))`
	`598`	`+ }`
`596`	`599`	`}`
`597`	`600`	`}`
`598`	`601`