Refactor JSON parsing in HttpClient

1 files changed, 42 insertions, 0 deletions

diff --git a/packages/connect/src/utils/relayer_response_json_parsers.ts b/packages/connect/src/utils/relayer_response_json_parsers.ts
new file mode 100644
index 000000000..02d88f26d
--- /dev/null
+++ b/packages/connect/src/utils/relayer_response_json_parsers.ts
@@ -0,0 +1,42 @@
+import {assert} from '@0xproject/assert';
+import {schemas} from '@0xproject/json-schemas';
+import * as _ from 'lodash';
+
+import {
+    FeesResponse,
+    OrderbookResponse,
+    SignedOrder,
+    TokenPairsItem,
+} from '../types';
+
+import {typeConverters} from './type_converters';
+
+export const relayerResponseJsonParsers = {
+    parseTokenPairsJson(json: any): TokenPairsItem[] {
+        assert.doesConformToSchema('tokenPairs', json, schemas.relayerApiTokenPairsResponseSchema);
+        return json.map((tokenPair: any) => {
+            return typeConverters.convertStringsFieldsToBigNumbers(tokenPair, [
+                'tokenA.minAmount',
+                'tokenA.maxAmount',
+                'tokenB.minAmount',
+                'tokenB.maxAmount',
+            ]);
+        });
+    },
+    parseOrdersJson(json: any): SignedOrder[] {
+        assert.doesConformToSchema('orders', json, schemas.signedOrdersSchema);
+        return json.map((order: object) => typeConverters.convertOrderStringFieldsToBigNumber(order));
+    },
+    parseOrderJson(json: any): SignedOrder {
+        assert.doesConformToSchema('order', json, schemas.signedOrderSchema);
+        return typeConverters.convertOrderStringFieldsToBigNumber(json);
+    },
+    parseOrderbookResponseJson(json: any): OrderbookResponse {
+        assert.doesConformToSchema('orderBook', json, schemas.relayerApiOrderBookResponseSchema);
+        return typeConverters.convertOrderbookStringFieldsToBigNumber(json);
+    },
+    parseFeesResponseJson(json: any): FeesResponse {
+        assert.doesConformToSchema('fees', json, schemas.relayerApiFeesResponseSchema);
+        return typeConverters.convertStringsFieldsToBigNumbers(json, ['makerFee', 'takerFee']);
+    },
+};