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Chain Configuration

Define the Specter chain for your frontend library.

viem chain definition​

import { defineChain } from 'viem';

export const specterTestnet = defineChain({
  id: 5445,
  name: 'Specter Testnet',
  nativeCurrency: {
    name: 'GHOST',
    symbol: 'GHOST',
    decimals: 18,
  },
  rpcUrls: {
    default: {
      http: ['https://testnet.specterchain.com'],
      webSocket: ['wss://testnet.specterchain.com/ws'],
    },
  },
  blockExplorers: {
    default: {
      name: 'Blockscout',
      url: 'https://explorer.specterchain.com',
    },
  },
});

ethers.js provider​

import { ethers } from 'ethers';

const provider = new ethers.JsonRpcProvider('https://testnet.specterchain.com', {
  name: 'specter-testnet',
  chainId: 5445,
});

// With WebSocket
const wsProvider = new ethers.WebSocketProvider('wss://testnet.specterchain.com/ws', {
  name: 'specter-testnet',
  chainId: 5445,
});

wagmi config​

import { createConfig, http } from 'wagmi';
import { specterTestnet } from './chains';

export const config = createConfig({
  chains: [specterTestnet],
  transports: {
    [specterTestnet.id]: http('https://testnet.specterchain.com'),
  },
});

RainbowKit​

import '@rainbow-me/rainbowkit/styles.css';
import { getDefaultConfig } from '@rainbow-me/rainbowkit';
import { specterTestnet } from './chains';

const config = getDefaultConfig({
  appName: 'My Specter dApp',
  projectId: 'YOUR_WALLETCONNECT_PROJECT_ID',
  chains: [specterTestnet],
});

Contract addresses​

export const CONTRACTS = {
  GHOST_VAULT: '0x443434113980Ab9d5Eef0Ace7d1A29AB68Af6c70',
  COMMITMENT_TREE: '0xB7E37E652F3024bAaaf84b12ae301f8E1feC4D87',
  NULLIFIER_REGISTRY: '0x0987cc3dE6f76c4c8834Dc6205De24968091C58b',
  GHOST_ERC20_FACTORY: '0x925B548F059C0B8B6CF7168Efb84881252F88C8E',
  NATIVE_HANDLER: '0x35cdaE691037fcBb3ff9D0518725F1ae98d502b7',
  PROOF_VERIFIER: '0x2C8Fb67874E5f380efB995a9Ab59b2Ef327E5bd2',
  POSEIDON_T3: '0xa786eDD407eb9EbaCA5E624B7Ee7C31E3b7f9521',
  OPEN_GHOST_VAULT: '0x45B022fEB169AF906CaBa8086c977AA7b15faAf1',
} as const;

export const GAS_PRICE = 1_000_000_000n; // 1 gwei

Important: gas price​

Always set gasPrice explicitly. The Cosmos EVM module may return 0 from eth_gasPrice:

const tx = await contract.someFunction({
  gasPrice: 1_000_000_000n,
});