remove the bridge_trnasfer snippet, sidechain devnet is shut down (#747)

* Update the Paths snippet test: Create trust lines internally to demonstrate ripple_path_find RPC

* remove the bridge_trnasfer snippet, sidechain devnet is shut down

* [Fix] paths snippet: Re-Use TST tokens from xrpl.org docs tutorials

* Use PathFind RPC instead of RipplePathFind

snippets/paths.py

@@ -1,47 +1,54 @@
 """Example of how to find the best path to trade with"""
-from xrpl.clients import JsonRpcClient
-from xrpl.models import XRP, IssuedCurrencyAmount, Payment, RipplePathFind
+
+from xrpl.clients import WebsocketClient
+from xrpl.models import IssuedCurrencyAmount, PathFind, Payment
+from xrpl.models.requests import PathFindSubcommand
 from xrpl.transaction import autofill_and_sign
 from xrpl.wallet import generate_faucet_wallet
 
 # References
 # - https://xrpl.org/paths.html#paths
 # - https://xrpl.org/ripple_path_find.html#ripple_path_find
+# Prerequisites for this snippet. Please verify these conditions after a reset of the
+# test network:
+# - destination_account must have a trust line with the destination_amount.issuer
+# - There must be appropriate DEX Offers or XRP/TST AMM for the cross-currency exchange
 
 # Create a client to connect to the test network
-client = JsonRpcClient("https://s.altnet.rippletest.net:51234")
-
-# Creating wallet to send money from
-wallet = generate_faucet_wallet(client, debug=True)
-
-# Create account and amount variables for later transaction
-destination_account = "rKT4JX4cCof6LcDYRz8o3rGRu7qxzZ2Zwj"
-destination_amount = IssuedCurrencyAmount(
-    value="0.001",
-    currency="USD",
-    issuer="rVnYNK9yuxBz4uP8zC8LEFokM2nqH3poc",
-)
-
-# Create a RipplePathFind request and have the client call it
-path_request = RipplePathFind(
-    source_account=wallet.address,
-    source_currencies=[XRP()],
-    destination_account=destination_account,
-    destination_amount=destination_amount,
-)
-path_response = client.request(path_request)
-print(path_response)
-
-# Extract out paths from the RipplePathFind response
-paths = path_response.result["alternatives"][0]["paths_computed"]
-print(paths)
-
-# Create a Payment to send money from wallet to destination_account using path
-payment_tx = Payment(
-    account=wallet.address,
-    amount=destination_amount,
-    destination=destination_account,
-    paths=paths,
-)
-
-print("signed: ", autofill_and_sign(payment_tx, client, wallet))
+# PathFind RPC requires the use of a Websocket client only
+
+with WebsocketClient("wss://s.altnet.rippletest.net:51233") as client:
+    # Creating wallet to send money from
+    wallet = generate_faucet_wallet(client, debug=True)
+
+    # Create account and amount variables for later transaction
+    destination_account = "rJPeZVPty1bXXbDR9oKscg2irqABr7sP3t"
+    destination_amount = IssuedCurrencyAmount(
+        value="0.001",
+        currency="TST",
+        issuer="rP9jPyP5kyvFRb6ZiRghAGw5u8SGAmU4bd",
+    )
+
+    # Create a RipplePathFind request and have the client call it
+    path_request = PathFind(
+        subcommand=PathFindSubcommand.CREATE,
+        source_account=wallet.address,
+        destination_account=destination_account,
+        destination_amount=destination_amount,
+    )
+    path_response = client.request(path_request)
+    print(path_response)
+
+    # Extract out paths from the RipplePathFind response
+    paths = path_response.result["alternatives"][0]["paths_computed"]
+    print(paths)
+
+    # Create a Payment to send money from wallet to destination_account using path
+    payment_tx = Payment(
+        account=wallet.address,
+        amount=destination_amount,
+        destination=destination_account,
+        paths=paths,
+    )
+
+    print("signed: ", autofill_and_sign(payment_tx, client, wallet))