fix

test/utils/Converter.ts

@@ -1,4 +1,6 @@
 import BigNumber from "bignumber.js";
+import { getDefaultWeb3 } from './EVM';
+
 
 export const MAX_UINT256 = "0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"
 
@@ -12,4 +14,9 @@ export function gweiStr(gwei: string): string {
 
 export function mweiStr(gwei: string): string {
   return new BigNumber(gwei).multipliedBy(10 ** 6).toFixed(0, BigNumber.ROUND_DOWN)
+}
+
+export function fromWei(value: string, unit: any): string {
+  var web3 = getDefaultWeb3();
+  return web3.utils.fromWei(value, unit);
 }