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96 lines
3.9 KiB
Python
96 lines
3.9 KiB
Python
# IMPORTANT: This example deposits and withdraws first-loss capital from a
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# preconfigured LoanBroker entry.
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import json
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import os
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import subprocess
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import sys
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from xrpl.clients import JsonRpcClient
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from xrpl.models import LoanBrokerCoverDeposit, LoanBrokerCoverWithdraw, MPTAmount
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from xrpl.transaction import submit_and_wait
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from xrpl.wallet import Wallet
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# Set up client ----------------------
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client = JsonRpcClient("https://s.devnet.rippletest.net:51234")
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# This step checks for the necessary setup data to run the lending protocol tutorials.
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# If missing, lending_setup.py will generate the data.
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if not os.path.exists("lending_setup.json"):
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print("\n=== Lending tutorial data doesn't exist. Running setup script... ===\n")
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subprocess.run([sys.executable, "lending_setup.py"], check=True)
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# Load preconfigured accounts and loan_broker_id.
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with open("lending_setup.json") as f:
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setup_data = json.load(f)
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# You can replace these values with your own.
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loan_broker = Wallet.from_seed(setup_data["loan_broker"]["seed"])
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loan_broker_id = setup_data["loan_broker_id"]
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mpt_id = setup_data["mpt_id"]
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print(f"\nLoan broker address: {loan_broker.address}")
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print(f"LoanBrokerID: {loan_broker_id}")
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print(f"MPT ID: {mpt_id}")
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# Prepare LoanBrokerCoverDeposit transaction ----------------------
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print("\n=== Preparing LoanBrokerCoverDeposit transaction ===\n")
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cover_deposit_tx = LoanBrokerCoverDeposit(
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account=loan_broker.address,
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loan_broker_id=loan_broker_id,
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amount=MPTAmount(mpt_issuance_id=mpt_id, value="2000"),
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)
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print(json.dumps(cover_deposit_tx.to_xrpl(), indent=2))
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# Sign, submit, and wait for deposit validation ----------------------
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print("\n=== Submitting LoanBrokerCoverDeposit transaction ===\n")
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deposit_response = submit_and_wait(cover_deposit_tx, client, loan_broker)
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if deposit_response.result["meta"]["TransactionResult"] != "tesSUCCESS":
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result_code = deposit_response.result["meta"]["TransactionResult"]
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print(f"Error: Unable to deposit cover: {result_code}")
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sys.exit(1)
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print("Cover deposit successful!")
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# Extract cover balance from the transaction result
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print("\n=== Cover Balance ===\n")
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loan_broker_node = next(
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node for node in deposit_response.result["meta"]["AffectedNodes"]
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if node.get("ModifiedNode", {}).get("LedgerEntryType") == "LoanBroker"
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)
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# First-loss capital is stored in the LoanBroker's pseudo-account.
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print(f"LoanBroker Pseudo-Account: {loan_broker_node['ModifiedNode']['FinalFields']['Account']}")
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print(f"Cover balance after deposit: {loan_broker_node['ModifiedNode']['FinalFields']['CoverAvailable']} TSTUSD")
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# Prepare LoanBrokerCoverWithdraw transaction ----------------------
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print("\n=== Preparing LoanBrokerCoverWithdraw transaction ===\n")
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cover_withdraw_tx = LoanBrokerCoverWithdraw(
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account=loan_broker.address,
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loan_broker_id=loan_broker_id,
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amount=MPTAmount(mpt_issuance_id=mpt_id, value="1000"),
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)
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print(json.dumps(cover_withdraw_tx.to_xrpl(), indent=2))
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# Sign, submit, and wait for withdraw validation ----------------------
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print("\n=== Submitting LoanBrokerCoverWithdraw transaction ===\n")
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withdraw_response = submit_and_wait(cover_withdraw_tx, client, loan_broker)
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if withdraw_response.result["meta"]["TransactionResult"] != "tesSUCCESS":
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result_code = withdraw_response.result["meta"]["TransactionResult"]
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print(f"Error: Unable to withdraw cover: {result_code}")
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sys.exit(1)
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print("Cover withdraw successful!")
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# Extract updated cover balance from the transaction result
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print("\n=== Updated Cover Balance ===\n")
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loan_broker_node = next(
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node for node in withdraw_response.result["meta"]["AffectedNodes"]
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if node.get("ModifiedNode", {}).get("LedgerEntryType") == "LoanBroker"
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)
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print(f"LoanBroker Pseudo-Account: {loan_broker_node['ModifiedNode']['FinalFields']['Account']}")
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print(f"Cover balance after withdraw: {loan_broker_node['ModifiedNode']['FinalFields']['CoverAvailable']} TSTUSD")
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