/**
 * End-to-end test of the deposit + payment flow.
 *
 * The SDK is signer- and transport-agnostic. To prove the helpers compose
 * correctly we wire them through:
 *
 *   - A real viem `WalletClient` against an in-memory L1 (a custom RPC
 *     transport routes JSON-RPC calls to a Map-backed chain). The wallet
 *     genuinely signs an EIP-1559 transaction with the depositNative
 *     calldata produced by buildDepositNativeRequest.
 *
 *   - A fetch-mocked gateway that decodes that same calldata via
 *     ESCROW_DEPOSIT_ABI, credits a balance, and later recovers the
 *     GenericPayment EIP-712 signer with viem's recoverTypedDataAddress —
 *     same cryptographic checks the real gateway runs.
 *
 * Anything weaker than this (hand-rolled sendTx, hand-rolled sig recovery)
 * would let the SDK's encoder or domain helpers drift silently. Going through
 * viem's real wallet + sign paths is what makes this a useful e2e.
 */
export {};