import { randomUUID } from 'node:crypto';
import { openai } from '@ai-sdk/openai';
import { generateText, stepCountIs, tool } from 'ai';
import { z } from 'zod';
import {
AuditApi,
Configuration,
PactsApi,
TransactionRecordsApi,
TransactionsApi,
} from '@cobo/agentic-wallet';
// ─── Env ─────────────────────────────────────────────────────────────────────
function requireEnv(name: string): string {
const v = process.env[name];
if (!v) throw new Error(`Missing required environment variable: ${name}`);
return v;
}
const env = {
basePath: requireEnv('AGENT_WALLET_API_URL'),
ownerKey: requireEnv('AGENT_WALLET_API_KEY'),
walletId: requireEnv('AGENT_WALLET_WALLET_ID'),
openaiApiKey: requireEnv('OPENAI_API_KEY'),
destination: process.env.CAW_DESTINATION ?? '0x1111111111111111111111111111111111111111',
};
// ─── Owner-scoped API clients ────────────────────────────────────────────────
const ownerConfig = new Configuration({ apiKey: env.ownerKey, basePath: env.basePath });
const pactsApi = new PactsApi(ownerConfig);
const ownerTxApi = new TransactionsApi(ownerConfig);
const recordsApi = new TransactionRecordsApi(ownerConfig);
const auditApi = new AuditApi(ownerConfig);
// ─── Demo pact spec ──────────────────────────────────────────────────────────
// Allow SETH transfers up to 0.002; anything larger is denied by policy.
const CHAIN_ID = 'SETH';
const TOKEN_ID = 'SETH';
const DEMO_PACT_SPEC = {
policies: [
{
name: 'max-tx-limit',
type: 'transfer',
rules: {
effect: 'allow',
when: {
chain_in: [CHAIN_ID],
token_in: [{ chain_id: CHAIN_ID, token_id: TOKEN_ID }],
},
deny_if: { amount_gt: '0.002' },
},
},
],
completion_conditions: [{ type: 'time_elapsed', threshold: '86400' }],
};
// ─── Pact session store ──────────────────────────────────────────────────────
// Capture (pact_id → api_key) as submit_pact / get_pact responses come back,
// then resolve pact-scoped TransactionsApi clients at transfer time.
const pactApiKeys = new Map<string, string>();
function capturePact(response: unknown): void {
if (!response || typeof response !== 'object') return;
const r = response as Record<string, unknown>;
const pactId = (r.pact_id ?? r.id) as string | undefined;
const apiKey = r.api_key as string | undefined;
if (pactId && apiKey) pactApiKeys.set(pactId, apiKey);
}
function txApiForPact(pactId?: string): TransactionsApi {
if (!pactId) return ownerTxApi;
const apiKey = pactApiKeys.get(pactId);
if (!apiKey) throw new Error(`Unknown pact_id ${pactId}. Call submit_pact or get_pact first.`);
return new TransactionsApi(new Configuration({ apiKey, basePath: env.basePath }));
}
// ─── Denial handling ─────────────────────────────────────────────────────────
// Surface policy denials back to the LLM as `{ error, suggestion }` so it can
// self-correct, instead of aborting the agent loop with an exception.
async function catchPolicyDenial<T>(
work: () => Promise<T>,
): Promise<T | { error: unknown; suggestion?: string }> {
try {
return await work();
} catch (err) {
const data = (err as { response?: { data?: { error?: unknown; suggestion?: string } } })
?.response?.data;
return { error: data?.error ?? 'UNKNOWN_ERROR', suggestion: data?.suggestion };
}
}
// ─── Prompts ─────────────────────────────────────────────────────────────────
const DEMO_USER_PROMPT =
`Use wallet ${env.walletId}. ` +
`Submit a pact for a controlled transfer task and wait until it is active. ` +
`Using the newly created pact, transfer 0.001 ${TOKEN_ID} to ${env.destination} on ${CHAIN_ID}. ` +
`Next, using the same pact, attempt 0.005 ${TOKEN_ID}. If denied, follow the denial ` +
`guidance and retry with a compliant amount. ` +
`Track the result by request_id and summarize what happened.`;
// ─── Tool definitions (Vercel AI SDK-specific) ───────────────────────────────
const submitPactTool = tool({
description: 'Submit a pact and return the pact id.',
inputSchema: z.object({ wallet_id: z.string(), intent: z.string() }),
execute: async ({ wallet_id, intent }) => {
const { data } = await pactsApi.submitPact({ wallet_id, intent, spec: DEMO_PACT_SPEC });
capturePact(data.result);
return data.result;
},
});
const getPactTool = tool({
description: 'Fetch a pact, including its status and api_key once active.',
inputSchema: z.object({ pact_id: z.string() }),
execute: async ({ pact_id }) => {
const { data } = await pactsApi.getPact(pact_id);
capturePact(data.result);
return data.result;
},
});
const estimateTransferFeeTool = tool({
description: 'Estimate fees for a token transfer before submitting it.',
inputSchema: z.object({
wallet_uuid: z.string(),
dst_addr: z.string(),
token_id: z.string(),
amount: z.string(),
pact_id: z.string().optional(),
}),
execute: async ({ wallet_uuid, dst_addr, token_id, amount, pact_id }) => {
const { data } = await txApiForPact(pact_id).estimateTransferFee(wallet_uuid, {
chain_id: CHAIN_ID,
dst_addr,
token_id,
amount,
});
return data.result;
},
});
const transferTokensTool = tool({
description:
'Execute a policy-enforced transfer. A unique request_id is auto-generated ' +
'and returned; use that value to track or look up the tx later. Pass pact_id ' +
'to invoke under pact-scoped policy permissions.',
inputSchema: z.object({
wallet_uuid: z.string(),
dst_addr: z.string(),
token_id: z.string(),
amount: z.string(),
pact_id: z.string().optional(),
}),
execute: async ({ wallet_uuid, dst_addr, token_id, amount, pact_id }) =>
catchPolicyDenial(async () => {
const { data } = await txApiForPact(pact_id).transferTokens(wallet_uuid, {
chain_id: CHAIN_ID,
dst_addr,
token_id,
amount,
request_id: randomUUID(),
});
return data.result;
}),
});
const getTransactionRecordByRequestIdTool = tool({
description: 'Look up a transaction record by request id.',
inputSchema: z.object({ wallet_uuid: z.string(), request_id: z.string() }),
execute: async ({ wallet_uuid, request_id }) => {
const { data } = await recordsApi.getUserTransactionByRequestId(wallet_uuid, request_id);
return data.result;
},
});
const getAuditLogsTool = tool({
description: 'List recent audit log entries for the wallet.',
inputSchema: z.object({
wallet_id: z.string(),
limit: z.number().int().positive().optional(),
}),
execute: async ({ wallet_id, limit }) => {
const { data } = await auditApi.listAuditLogs(
wallet_id,
undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined,
limit ?? 20,
);
const items = (data.result as { items?: Array<{ result?: string }> })?.items ?? [];
return {
items,
allowed: items.filter(it => it.result === 'allowed').length,
denied: items.filter(it => it.result === 'denied').length,
};
},
});
// ─── Boot ────────────────────────────────────────────────────────────────────
const result = await generateText({
model: openai('gpt-4.1-mini'),
prompt: DEMO_USER_PROMPT,
tools: {
submit_pact: submitPactTool,
get_pact: getPactTool,
estimate_transfer_fee: estimateTransferFeeTool,
transfer_tokens: transferTokensTool,
get_transaction_record_by_request_id: getTransactionRecordByRequestIdTool,
get_audit_logs: getAuditLogsTool,
},
stopWhen: stepCountIs(20),
});
console.log(result.text);
