1 files changed, 11 insertions, 0 deletions
diff --git a/src/ts/utils/utils.ts b/src/ts/utils/utils.ts
index 04ac36b54..b514b702d 100644
--- a/src/ts/utils/utils.ts
+++ b/src/ts/utils/utils.ts
@@ -1,4 +1,15 @@
+import * as BN from 'bn.js';
+
 export const utils = {
+    /**
+     * Converts BigNumber instance to BN
+     * The only reason we convert to BN is to remain compatible with `ethABI. soliditySHA3` that
+     * expects values of Solidity type `uint` to be passed as type `BN`.
+     * We do not use BN anywhere else in the codebase.
+     */
+    bigNumberToBN(value: BigNumber.BigNumber) {
+        return new BN(value.toString(), 10);
+    },
     consoleLog(message: string): void {
         /* tslint:disable */
         console.log(message);