1 files changed, 43 insertions, 0 deletions
diff --git a/packages/connect/src/utils/orderbook_channel_message_parsers.ts b/packages/connect/src/utils/orderbook_channel_message_parsers.ts
new file mode 100644
index 000000000..b590b189b
--- /dev/null
+++ b/packages/connect/src/utils/orderbook_channel_message_parsers.ts
@@ -0,0 +1,43 @@
+import * as _ from 'lodash';
+import {SignedOrder} from '0x.js';
+import {assert} from '@0xproject/assert';
+import {schemas} from '@0xproject/json-schemas';
+import {
+    OrderbookChannelMessage,
+    OrderbookChannelMessageTypes,
+} from '../types';
+import {typeConverters} from './type_converters';
+
+export const orderbookChannelMessageParsers = {
+    parser(utf8Data: string): OrderbookChannelMessage {
+        const messageObj = JSON.parse(utf8Data);
+        const type: string = _.get(messageObj, 'type');
+        assert.assert(!_.isUndefined(type), `Message is missing a type parameter: ${utf8Data}`);
+        switch (type) {
+            case (OrderbookChannelMessageTypes.Snapshot): {
+                assert.doesConformToSchema('message', messageObj, schemas.relayerApiOrderbookChannelSnapshotSchema);
+                const orderbook = messageObj.payload;
+                typeConverters.convertOrderbookStringFieldsToBigNumber(orderbook);
+                return {
+                    type,
+                    payload: orderbook,
+                };
+            }
+            case (OrderbookChannelMessageTypes.Update): {
+                assert.doesConformToSchema('message', messageObj, schemas.relayerApiOrderbookChannelUpdateSchema);
+                const order = messageObj.payload;
+                typeConverters.convertOrderStringFieldsToBigNumber(order);
+                return {
+                    type,
+                    payload: order,
+                };
+            }
+            default: {
+                return {
+                    type: OrderbookChannelMessageTypes.Unknown,
+                    payload: undefined,
+                };
+            }
+        }
+    },
+};