Quote

{
  "data": {
    "estimatedTimeSeconds": 3,
    "expiresAt": 1786374968171,
    "fee": {
      "amount": "0",
      "bps": 0
    },
    "input": {
      "amount": "1000000000000000000",
      "token": {
        "chainId": 1,
        "decimals": 18,
        "isNative": true,
        "symbol": "ETH"
      }
    },
    "output": {
      "amount": "999534824840543000",
      "token": {
        "chainId": 8453,
        "decimals": 18,
        "isNative": true,
        "symbol": "ETH"
      }
    },
    "quoteToken": "eyJ2ZW51ZUlkIjoi...",
    "routeType": "EVM_CROSS_CHAIN",
    "venue": {
      "id": "mayan",
      "name": "Mayan"
    }
  }
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://app.ravn.exchange/api/v1/x402/quote' \
  -H 'content-type: application/json' \
  --data-raw '{"inputAmount":"1000000000000000000","inputChainId":1,"inputToken":"0xEeeeeEeeeEeEeeEeEeEeeeEEeeeeEeeeeeeeEEeE","outputChainId":8453,"outputToken":"0xEeeeeEeeeEeEeeEeEeEeeeEEeeeeEeeeeeeeEEeE","userAddress":"0x0000000000000000000000000000000000dEaD"}'

# x402 v2 sends the challenge base64-encoded in the PAYMENT-REQUIRED header (v1 sends it in the body).
# To read the header:
curl -sS -g -o /dev/null -D - -X POST 'https://app.ravn.exchange/api/v1/x402/quote' \
  -H 'content-type: application/json' \
  --data-raw '{"inputAmount":"1000000000000000000","inputChainId":1,"inputToken":"0xEeeeeEeeeEeEeeEeEeEeeeEEeeeeEeeeeeeeEEeE","outputChainId":8453,"outputToken":"0xEeeeeEeeeEeEeeEeEeEeeeEEeeeeEeeeeeeeEEeE","userAddress":"0x0000000000000000000000000000000000dEaD"}' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode

// npm i @x402/fetch @x402/evm viem
import { wrapFetchWithPayment, x402Client } from "@x402/fetch";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

// Pays at most $0.001 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.001" });
registerExactEvmScheme(client, { signer: privateKeyToAccount(process.env.EVM_PRIVATE_KEY) });
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? ToolVet checks it first for $0.005. Pay for that from a separate
// client: this one is capped at $0.001 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fapp.ravn.exchange%2Fapi%2Fv1%2Fx402%2Fquote&method=POST
const res = await pay("https://app.ravn.exchange/api/v1/x402/quote", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "inputAmount": "1000000000000000000",
    "inputChainId": 1,
    "inputToken": "0xEeeeeEeeeEeEeeEeEeEeeeEEeeeeEeeeeeeeEEeE",
    "outputChainId": 8453,
    "outputToken": "0xEeeeeEeeeEeEeeEeEeEeeeEEeeeeEeeeeeeeEEeE",
    "userAddress": "0x0000000000000000000000000000000000dEaD"
  }),
});
console.log(res.status, await res.text());

# pip install "x402[requests,evm]"
import os
from eth_account import Account
from x402 import x402ClientSync
from x402.http.clients import x402_requests
from x402.mechanisms.evm import EthAccountSigner
from x402.mechanisms.evm.exact.register import register_exact_evm_client

# Pays at most $0.001 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.001"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://app.ravn.exchange/api/v1/x402/quote",
        json={
            "inputAmount": "1000000000000000000",
            "inputChainId": 1,
            "inputToken": "0xEeeeeEeeeEeEeeEeEeEeeeEEeeeeEeeeeeeeEEeE",
            "outputChainId": 8453,
            "outputToken": "0xEeeeeEeeeEeEeeEeEeEeeeEEeeeeEeeeeeeeEEeE",
            "userAddress": "0x0000000000000000000000000000000000dEaD",
        },
    )
    print(res.status_code, res.text)