Send tokens with Agents

Introduction

This file can be run on any platform supporting Python, with the necessary install permissions. This example shows how to use Agents to make them send tokens with one another.

Supporting documentation

The agent

sending_tokens.py

from uagents import Agent, Bureau, Context, Model
from uagents.network import wait_for_tx_to_complete
from uagents.setup import fund_agent_if_low
 
class PaymentRequest(Model):
    wallet_address: str
    amount: int
    denom: str
 
class TransactionInfo(Model):
    tx_hash: str
 
AMOUNT = 100
DENOM = "atestfet"
 
alice = Agent(name="alice", seed="alice secret phrase")
bob = Agent(name="bob", seed="bob secret phrase")
 
fund_agent_if_low(alice.wallet.address())
fund_agent_if_low(bob.wallet.address(), min_balance=AMOUNT)
 
@alice.on_interval(period=10.0)
async def request_funds(ctx: Context):
    await ctx.send(
        bob.address,
        PaymentRequest(
            wallet_address=str(alice.wallet.address()), amount=AMOUNT, denom=DENOM
        ),
    )
 
@alice.on_message(model=TransactionInfo)
async def confirm_transaction(ctx: Context, sender: str, msg: TransactionInfo):
    ctx.logger.info(f"Received transaction info from {sender}: {msg}")
 
    tx_resp = await wait_for_tx_to_complete(msg.tx_hash, ctx.ledger)
    coin_received = tx_resp.events["coin_received"]
 
    if (
        coin_received["receiver"] == str(alice.wallet.address())
        and coin_received["amount"] == f"{AMOUNT}{DENOM}"
    ):
        ctx.logger.info(f"Transaction was successful: {coin_received}")
 
@bob.on_message(model=PaymentRequest, replies=TransactionInfo)
async def send_payment(ctx: Context, sender: str, msg: PaymentRequest):
    ctx.logger.info(f"Received payment request from {sender}: {msg}")
    transaction = ctx.ledger.send_tokens(
        msg.wallet_address, msg.amount, msg.denom, bob.wallet
    )
 
    await ctx.send(alice.address, TransactionInfo(tx_hash=transaction.tx_hash))
 
bureau = Bureau()
bureau.add(alice)
bureau.add(bob)
 
if __name__ == "__main__":
    bureau.run()

Expected output

[  bob]: Received payment request from agent1qdp9j2ev86k3h5acaayjm8tpx36zv4mjxn05pa2kwesspstzj697xy5vk2a: wallet_address='fetch1967p3vkp0yngdfturv4ypq2p4g760ml705wcxy' amount=100 denom='atestfet'
[alice]: Received transaction info from agent1q2kxet3vh0scsf0sm7y2erzz33cve6tv5uk63x64upw5g68kr0chkv7hw50: tx_hash='DB662CCF415C7B0C9A02928967BE1817506D02A041AA05CA48DCE5CF87D5A638'
[alice]: Transaction was successful: {'receiver': 'fetch1967p3vkp0yngdfturv4ypq2p4g760ml705wcxy', 'amount': '100atestfet'}

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