Fix bug that occurs when token metadata decimals is undefined. (#1426)

* Fix bug that occurs when token metadata decimals is undefined.

* move toBigNumberOrNull to utils

1 files changed, 3 insertions, 4 deletions

diff --git a/packages/pipeline/src/parsers/token_metadata/index.ts b/packages/pipeline/src/parsers/token_metadata/index.ts
index f258af063..65e0aaa6e 100644
--- a/packages/pipeline/src/parsers/token_metadata/index.ts
+++ b/packages/pipeline/src/parsers/token_metadata/index.ts
@@ -1,9 +1,8 @@
-import { BigNumber } from '@0x/utils';
 import * as R from 'ramda';
 
 import { MetamaskTrustedTokenMeta, ZeroExTrustedTokenMeta } from '../../data_sources/trusted_tokens';
 import { TokenMetadata } from '../../entities';
-import {} from '../../utils';
+import { toBigNumberOrNull } from '../../utils';
 
 /**
  * Parses Metamask's trusted tokens list.
@@ -26,7 +25,7 @@ function parseMetamaskTrustedToken(resp: MetamaskTrustedTokenMeta, address: stri
     const trustedToken = new TokenMetadata();
 
     trustedToken.address = address;
-    trustedToken.decimals = new BigNumber(resp.decimals);
+    trustedToken.decimals = toBigNumberOrNull(resp.decimals);
     trustedToken.symbol = resp.symbol;
     trustedToken.name = resp.name;
     trustedToken.authority = 'metamask';
@@ -38,7 +37,7 @@ function parseZeroExTrustedToken(resp: ZeroExTrustedTokenMeta): TokenMetadata {
     const trustedToken = new TokenMetadata();
 
     trustedToken.address = resp.address;
-    trustedToken.decimals = resp.decimals ? new BigNumber(resp.decimals) : null;
+    trustedToken.decimals = toBigNumberOrNull(resp.decimals);
     trustedToken.symbol = resp.symbol;
     trustedToken.name = resp.name;
     trustedToken.authority = '0x';