Inference. Now onchain.

import { createPublicClient, createWalletClient, http, parseUnits, zeroAddress } from 'viem';
import { privateKeyToAccount } from 'viem/accounts';

// EXCHANGE and USDG: the addresses at pontica.gg/protocol/agents#contracts
const chain = { id: 4663, name: 'Robinhood Chain', nativeCurrency: { name: 'Ether', symbol: 'ETH', decimals: 18 },
  rpcUrls: { default: { http: ['https://rpc.mainnet.chain.robinhood.com'] } } };
const abi = (name) => fetch(`https://pontica.gg/protocol/abi/${name}.json`).then((r) => r.json());
const [exchangeAbi, erc20Abi] = await Promise.all([abi('exchange'), abi('erc20')]);
const account = privateKeyToAccount(process.env.AGENT_KEY);
const pub = createPublicClient({ chain, transport: http() });
const wallet = createWalletClient({ account, chain, transport: http() });

const usdgIn = parseUnits('20', 6); // USDG and OBOL both have 6 decimals
const [book, mintOut] = await pub.readContract({ address: EXCHANGE, abi: exchangeAbi,
  functionName: 'getActivationQuote', args: [usdgIn, 64n, true] });
const minCreditOut = ((book.creditOut + mintOut) * 995n) / 1000n; // other buys may land first

const approve = await wallet.writeContract({ address: USDG, abi: erc20Abi,
  functionName: 'approve', args: [EXCHANGE, usdgIn] });
await pub.waitForTransactionReceipt({ hash: approve });
await wallet.writeContract({ address: EXCHANGE, abi: exchangeAbi, functionName: 'buyAndActivateWith', args: [
  { usdgIn, minCreditOut, recipient: account.address, maxFills: 64n, mintRemainder: true, referrer: zeroAddress },
  account.address,
] });

// the exact text the gateway accepts: one use, ten minutes at most
const iso = (d) => d.toISOString().replace(/\.\d{3}Z$/, 'Z');
const issuedAt = new Date();
const expires = new Date(issuedAt.getTime() + 10 * 60 * 1000);
const nonce = [...crypto.getRandomValues(new Uint8Array(8))].map((b) => b.toString(16).padStart(2, '0')).join('');
const message = [
  'pontica.gg wants you to sign in with your Ethereum account:',
  account.address, // the EIP-55 checksum form
  '',
  'Issue a Pontica API key for this wallet. This retires any key it already has.',
  '',
  'URI: https://pontica.gg',
  'Version: 1',
  'Chain ID: 4663',
  `Nonce: ${nonce}`,
  `Issued At: ${iso(issuedAt)}`,
  `Expiration Time: ${iso(expires)}`,
].join('\n');

const signature = await wallet.signMessage({ message }); // personal_sign over the UTF-8 bytes
const res = await fetch('https://pontica.gg/api/v1/keys', {
  method: 'POST', headers: { 'content-type': 'application/json' },
  body: JSON.stringify({ address: account.address, message, signature }),
});
const { key, hash, remaining_usd } = await res.json(); // 201: the only time the key is shown

curl https://pontica.gg/api/v1/chat/completions \
  -H "Authorization: Bearer $PONTICA_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "anthropic/claude-sonnet-5",
    "messages": [{ "role": "user", "content": "Plan the next task in three steps." }],
    "stream": true
  }'