Renamed fetch-price to show-price

bin/show-price

@@ -0,0 +1,47 @@
+#!/usr/bin/env python3
+
+import argparse
+import logging
+import os
+import os.path
+import sys
+
+sys.path.insert(0, os.path.abspath(
+    os.path.join(os.path.dirname(__file__), "..")))
+import mango  # nopep8
+
+parser = argparse.ArgumentParser(description="Displays the price from the Pyth Network.")
+mango.ContextBuilder.add_command_line_parameters(parser)
+parser.add_argument("--provider", type=str, required=True,
+                    help="name of the price provider to use (e.g. pyth)")
+parser.add_argument("--market", type=str, required=True,
+                    help="market symbol to display (e.g. ETH/USDC)")
+parser.add_argument("--stream", action="store_true", default=False,
+                    help="stream the prices until stopped")
+args: argparse.Namespace = mango.parse_args(parser)
+
+context = mango.ContextBuilder.from_command_line_parameters(args)
+
+logging.info(str(context))
+
+oracle_provider: mango.OracleProvider = mango.create_oracle_provider(context, args.provider)
+
+market = context.market_lookup.find_by_symbol(args.market)
+if market is None:
+    raise Exception(f"Could not find market {args.market}.")
+
+oracle = oracle_provider.oracle_for_market(context, market)
+if oracle is None:
+    mango.output(f"Could not find oracle for market {market.symbol} from provider {args.provider}.")
+else:
+    if not args.stream:
+        price = oracle.fetch_price(context)
+        mango.output(price)
+    else:
+        mango.output("Press <ENTER> to quit.")
+        price_subscription = oracle.to_streaming_observable(context)
+        disposable = price_subscription.subscribe(mango.PrintingObserverSubscriber(False))
+
+        # Wait - don't exit
+        input()
+        disposable.dispose()

docs/MarketmakingIntroduction.md

@@ -25,7 +25,7 @@ while :
 do
     cancel-my-orders --name "WSMM ${MARKET} (cancel)" --market $MARKET --log-level ERROR
 
-    CURRENT_PRICE=$(fetch-price --provider serum --symbol $ORACLE_MARKET --log-level ERROR --cluster-name mainnet | cut -d"'" -f 2 | sed 's/,//')
+    CURRENT_PRICE=$(show-price --provider serum --market $ORACLE_MARKET --log-level ERROR --cluster-name mainnet | cut -d"'" -f 2 | sed 's/,//')
     place-order --name "WSMM ${MARKET} (buy)" --market $MARKET --order-type LIMIT \
         --log-level ERROR --side BUY --quantity $FIXED_POSITION_SIZE --price $(echo "$CURRENT_PRICE - $FIXED_SPREAD" | bc)
     place-order --name "WSMM ${MARKET} (sell)" --market $MARKET --order-type LIMIT \
@@ -43,7 +43,7 @@ mango-explorer worlds-simplest-market-maker ETH-PERP 1 10 30
 ```
 That’s not bad for 21 lines of `bash` scripting! OK, the price-fetching is a bit contorted, but you can see it’s calling:
 * `cancel-my-orders`
-* `fetch-price`
+* `show-price`
 * `place-order` (BUY)
 * `place-order` (SELL)
 * `sleep`

docs/MarketmakingOracles.md

@@ -22,11 +22,11 @@ Specifics to each of these implementations are detailed later in the 'Oracle Ref
 
 You can see an example of using an oracle to fetch the current price by using the following command:
 ```
-$ fetch-price --symbol BTC/USDC --provider ftx
+$ show-price --market BTC/USDC --provider ftx
 ```
 Alternatively, to get the current price of the BTC perp on Mango:
 ```
-$ fetch-price --symbol BTC-PERP --provider market
+$ show-price --market BTC-PERP --provider market
 ```
 
 

scripts/random-taker

@@ -10,7 +10,7 @@ do
     cancel-my-orders --name "Random Taker ${MARKET} (cancel)" --market $MARKET --log-level ERROR
 
     RANDOM_POSITION_SIZE=$(echo "scale=4; ($(echo "$RANDOM % 1000" | bc) / 1000) * $POSITION_SIZE_CEILING" | bc)
-    CURRENT_PRICE=$(fetch-price --provider ftx --symbol $ORACLE_MARKET --log-level ERROR 2>&1 | cut -d" " -f 8 | sed 's/,//')
+    CURRENT_PRICE=$(show-price --provider ftx --market $ORACLE_MARKET --log-level ERROR 2>&1 | cut -d" " -f 8 | sed 's/,//')
     place-order --name "Random Taker ${MARKET} (place buy)" --market $MARKET --order-type IOC --log-level ERROR \
         --side BUY --quantity $RANDOM_POSITION_SIZE --price $(echo "$CURRENT_PRICE + $IMMEDIATE_BUY_ADJUSTMENT" | bc)
 
@@ -19,7 +19,7 @@ do
     sleep ${PAUSE_FOR}
 
     RANDOM_POSITION_SIZE=$(echo "scale=4; ($(echo "$RANDOM % 1000" | bc) / 1000) * $POSITION_SIZE_CEILING" | bc)
-    CURRENT_PRICE=$(fetch-price --provider ftx --symbol $ORACLE_MARKET --log-level ERROR 2>&1 | cut -d" " -f 8 | sed 's/,//')
+    CURRENT_PRICE=$(show-price --provider ftx --market $ORACLE_MARKET --log-level ERROR 2>&1 | cut -d" " -f 8 | sed 's/,//')
     place-order --name "Random Taker ${MARKET} (place sell)" --market $MARKET --order-type IOC --log-level ERROR \
         --side SELL --quantity $RANDOM_POSITION_SIZE --price $(echo "$CURRENT_PRICE - $IMMEDIATE_BUY_ADJUSTMENT" | bc)
 

scripts/worlds-simplest-market-maker

@@ -10,7 +10,7 @@ while :
 do
     cancel-my-orders --name "WSMM ${MARKET} (cancel)" --market $MARKET --log-level ERROR
 
-    CURRENT_PRICE=$(fetch-price --provider serum --symbol $ORACLE_MARKET --log-level ERROR --cluster-name mainnet | cut -d"'" -f 2 | sed 's/,//')
+    CURRENT_PRICE=$(show-price --provider serum --market $ORACLE_MARKET --log-level ERROR --cluster-name mainnet | cut -d"'" -f 2 | sed 's/,//')
     place-order --name "WSMM ${MARKET} (buy)" --market $MARKET --order-type LIMIT \
         --log-level ERROR --side BUY --quantity $FIXED_POSITION_SIZE --price $(echo "$CURRENT_PRICE - $FIXED_SPREAD" | bc)
     place-order --name "WSMM ${MARKET} (sell)" --market $MARKET --order-type LIMIT \