express

Express resource server (EVM + TRON)

Protects GET /weather behind x402 payment. src/index.ts is chain-agnostic; each chain's scheme registration + accepts entry lives in src/chains/.

Keyless by design

A resource server never signs or holds funds. It only:

1. advertises accepts (price + payTo address) per enabled chain, and
2. delegates verify/settle to a facilitator over HTTP (HTTPFacilitatorClient).

So there is no agent-wallet here — just public payout addresses. A chain is advertised only when its *_ADDRESS is set, so you can accept EVM-only, TRON-only, or both.

Run

# Start a facilitator first (see ../../facilitator/basic), then:
pnpm install            # from examples/typescript
pnpm dev                # or: pnpm --filter @bankofai/x402-example-server-express dev

Then pay it with the fetch client (../../clients/fetch).

Networks

Chain	Network	Tokens advertised	payTo env
EVM	eip155:97 (BSC testnet)	DHLU (eip3009), USDC (permit2)	EVM_ADDRESS
TRON	tron:0xcd8690dc	USDT, USDD (permit2)	TRON_ADDRESS

Tokens are configured per network in src/chains/evm.ts (EVM_TOKENS) and src/chains/tron.ts. BSC USDC needs a one-time Permit2 approve, advertised via the gas-sponsoring extension; DHLU (ERC-3009) needs none.