@xenga/types

Shared types, constants, ABIs, and utilities for the xenga escrow payment protocol.

Install

npm install @xenga/types

What's included

• Types — Order, OnChainEscrow, EscrowState, ReputationScore, EscrowPaymentRequired, EscrowPaymentPayload, EscrowPaymentResponse, Stats, etc.
• Constants — Chain configs (Base Sepolia/Mainnet), USDC addresses, service type windows, reputation thresholds
• EIP-712 — buildReceiveAuthSigningParams() for ERC-3009 gasless USDC authorizations
• ABIs — Auto-generated EscrowVault ABI (via @xenga/types/abi)
• Errors — X402Error, NetworkError, InvalidPaymentHeaderError, SettlementError, etc.
• Retry — withRetry() exponential backoff helper, isRetryableError() predicate

Usage

import {
  type Order,
  type OnChainEscrow,
  EscrowState,
  getChainConfig,
  buildReceiveAuthSigningParams,
  NetworkError,
  withRetry,
} from "@xenga/types";

import { escrowVaultAbi } from "@xenga/types/abi";

Peer dependencies

• viem ^2.21.0