[CHORE] Fix oracle module stream prices examples

Author: aarmoa

examples/exchange_client/oracle_rpc/1_StreamPrices.py

@@ -23,13 +23,14 @@ async def main() -> None:
     # select network: local, testnet, mainnet
     network = Network.testnet()
     client = IndexerClient(network)
-    market = (await client.all_derivative_markets())[
-        "0x17ef48032cb24375ba7c2e39f384e56433bcab20cbee9a7357e4cba2eb00abe6"
-    ]
+    market_response = await client.fetch_derivative_market(
+        market_id="0x17ef48032cb24375ba7c2e39f384e56433bcab20cbee9a7357e4cba2eb00abe6"
+    )
+    market = market_response["market"]
 
-    base_symbol = market.oracle_base
-    quote_symbol = market.oracle_quote
-    oracle_type = market.oracle_type.lower()
+    base_symbol = market["oracleBase"]
+    quote_symbol = market["oracleQuote"]
+    oracle_type = market["oracleType"].lower()
 
     task = asyncio.get_event_loop().create_task(
         client.listen_oracle_prices_updates(

examples/exchange_client/oracle_rpc/6_StreamPricesByMarkets.py

@@ -22,13 +22,11 @@ def stream_closed_processor():
 async def main() -> None:
     network = Network.testnet()
     client = IndexerClient(network)
-    market = (await client.all_derivative_markets())[
-        "0x17ef48032cb24375ba7c2e39f384e56433bcab20cbee9a7357e4cba2eb00abe6"
-    ]
+    market_id = "0x17ef48032cb24375ba7c2e39f384e56433bcab20cbee9a7357e4cba2eb00abe6"
 
     task = asyncio.get_event_loop().create_task(
         client.listen_oracle_prices_by_markets_updates(
-            market_ids=[market.id],
+            market_ids=[market_id],
             callback=price_event_processor,
             on_end_callback=stream_closed_processor,
             on_status_callback=stream_error_processor,