typescript

agent-wallet (TypeScript)

Universal multi-chain signing SDK for AI agents — TypeScript implementation.

Install

npm install @bankofai/agent-wallet
# or
pnpm add @bankofai/agent-wallet

Includes CLI (agent-wallet), EVM and TRON support.

Quick Start

import { resolveWallet } from "@bankofai/agent-wallet";

const wallet = await resolveWallet({ network: "tron:nile" });
const signature = await wallet.signMessage(new TextEncoder().encode("hello"));

resolveWallet automatically finds your wallet config in ~/.agent-wallet (or AGENT_WALLET_DIR).

Public API

import {
  resolveWallet,          // → Wallet (one-shot)
  resolveWalletProvider,  // → ConfigWalletProvider | EnvWalletProvider
  ConfigWalletProvider,   // file-backed provider (local_secure / raw_secret)
  EnvWalletProvider,      // env-var-backed provider (AGENT_WALLET_PRIVATE_KEY)
} from "@bankofai/agent-wallet";

resolveWallet

Returns a ready-to-sign Wallet for the given network:

const wallet = await resolveWallet({ network: "eip155:1" });
const sig = await wallet.signTransaction({ to: "0x...", value: 0 });

resolveWalletProvider

Returns either ConfigWalletProvider or EnvWalletProvider based on what's available:

const provider = resolveWalletProvider({ network: "eip155:1" });

// Get the active wallet
const wallet = await provider.getActiveWallet();

// Or a specific wallet (ConfigWalletProvider only)
const wallet2 = await provider.getWallet("my_wallet", "tron:nile");

Provider resolution order

1. Password available (from runtime_secrets.json or AGENT_WALLET_PASSWORD) → ConfigWalletProvider
2. wallets_config.json exists with wallets → ConfigWalletProvider
3. Otherwise → EnvWalletProvider (reads AGENT_WALLET_PRIVATE_KEY / AGENT_WALLET_MNEMONIC)

Wallet Interface

interface Wallet {
  getAddress(): Promise<string>;
  signRaw(rawTx: Uint8Array): Promise<string>;
  signTransaction(payload: Record<string, unknown>): Promise<string>;
  signMessage(msg: Uint8Array): Promise<string>;
}

interface Eip712Capable {
  signTypedData(data: Record<string, unknown>): Promise<string>;
}

Both EVM and TRON network-specific signers implement Wallet + Eip712Capable.

Network Routing

Network string	Adapter	Mnemonic derivation
eip155 or eip155:<chainId>	EVM	m/44'/60'/0'/0/{index}
tron or tron:<chain>	TRON	m/44'/195'/0'/0/{index}

Environment Variables

Variable	Description
AGENT_WALLET_DIR	Wallet directory (default ~/.agent-wallet)
AGENT_WALLET_PASSWORD	Password for local_secure wallets
AGENT_WALLET_PRIVATE_KEY	Env fallback private key (hex)
AGENT_WALLET_MNEMONIC	Env fallback mnemonic phrase
AGENT_WALLET_MNEMONIC_ACCOUNT_INDEX	Mnemonic account index (default 0)

Examples

• tron-sign-and-broadcast.ts
• bsc-sign-and-broadcast.ts
• tron-x402-sign-typed-data.ts
• bsc-x402-sign-typed-data.ts
• dual-sign-typed-data-from-private-key.ts
• switch-active-wallet.ts

Development

pnpm install
pnpm test

License

MIT — BankOfAI