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Canonical Permit2 contract addresses by chain. Use when configuring multi-chain support.
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Based on SOC occupation classification
AI-powered crypto trading agent, wallet API, and LLM gateway via natural language. Use when the user wants to trade crypto, trade tokenized stocks and ETFs (spot or leveraged), check portfolio balances (with PnL and NFTs), view token prices, search tokens, transfer crypto, manage NFTs, use leverage (Hyperliquid or Avantis), bet on Polymarket, deploy tokens, set up automated trading, sign and submit raw transactions, call or deploy x402 paid API endpoints, browse the web, or access LLM models through the Bankr LLM gateway funded by your Bankr wallet. Supports Base, Ethereum, Polygon, Solana, Unichain, World Chain, Arbitrum, BNB Chain, and Robinhood Chain.
Live pay-per-call data for crypto and DeFi protocol risk, funding rates, open interest, liquidations, stablecoin health, macro, equities, and on-chain intelligence — settled per query in USDC on Base via x402, no signup or API key.
This skill should be used when the user asks about "create3", "deploy", "diamond factory", "package", "deterministic deployment", "cross-chain", "DiamondPackageCallBackFactory", "FactoryService", or needs guidance on deploying Diamond proxies and facets using Crane's factory system.
This skill should be used when the user asks about "testbase", "behavior library", "invariant test", "handler", "fuzz test", "test pattern", "Behavior_", "TestBase_", "mock", "vm.mockCall", "unit test", "write a test", "CraneTest", or needs guidance on Crane's testing infrastructure for writing comprehensive smart contract tests. Prefer production code over mocks.
Foundry cheatcodes, assertions, and forge test CLI. Use for vm.prank, expectRevert, verbosity, and general Foundry mechanics. For Crane/IndexedEx protocol and Diamond tests, prefer crane-testing and production-first deploy paths over mocks.
This skill should be used when the user asks about "facet", "target", "repo", "diamond pattern", "storage slot", "guard function", "DFPkg", "AwareRepo", "Service pattern", "Modifiers", "ERC2535", or needs guidance on Crane's core architectural patterns for building modular, upgradeable smart contracts.
| name | permit2-addresses |
| description | Canonical Permit2 contract addresses by chain. Use when configuring multi-chain support. |
All chains use the same address:
0x000000000022D473030F116dDEE9F6B43aC78BA3
| Chain | Chain ID | Status |
|---|---|---|
| Ethereum Mainnet | 1 | ✅ |
| Arbitrum | 42161 | ✅ |
| Optimism | 10 | ✅ |
| Base | 8453 | ✅ |
| Polygon | 137 | ✅ |
| Avalanche | 43114 | ✅ |
| BNB Chain | 56 | ✅ |
| Sepolia (testnet) | 11155111 | ✅ |
| Arbitrum Sepolia | 421614 | ✅ |
| Base Sepolia | 84532 | ✅ |
| Optimism Sepolia | 11155420 | ✅ |
| Foundry (local) | 31337 | ✅ |
import { PERMIT2_ADDRESS } from '@uniswap/permit2-sdk'
// Or hardcoded (canonical)
const PERMIT2 = '0x000000000022D473030F116dDEE9F6B43aC78BA3'
import { permit2Address } from '@uniswap/permit2-sdk'
const permit2 = permit2Address(chainId)
The frontend stores addresses in:
frontend/app/addresses/{chain}/base_deployments.json
Example usage:
import platformSepolia from './app/addresses/sepolia/base_deployments.json'
import platformFoundry from './app/addresses/anvil_base_main/base_deployments.json'
const permit2Address = chainId === sepolia.id
? platformSepolia.permit2
: platformFoundry.permit2