# 7.3 Technical Specifications

### GRX Chain — Mainnet

* **Network Name:** GRX Chain
* **RPC URL:** `https://rpc.grxchain.io`
* **Chain ID:** `1110`
* **Symbol:** `GRX`
* **Block Explorer:** `https://grxscan.io`

#### Core Contracts (Mainnet)

* **Multicall:** `0x2cd9E100Ca0d883A00eC8Ce635EbD4C17508FE3B`
* **WGRX (Wrapped GRX):** `0x45C7287F897B3A79Cd3f6e4F14B4CE568f023bD5`
* **GRXswap Factory:** `0xc7316818841f355c5107753A3f3FDEA799BD25f6`
* **GRXswap Router (v2):** `0x28fC93b8a20570f2B59d5CA9f8a1dA02C4DBcDF5`
* **GRXswap Pair Init Code Hash:**\
  `0xb23d9a8f0a03ecd8f95e43ab1025c71bb79f1cb7128d40546417bfb4b2a74d9c`

#### Canonical Tokens (Mainnet)

* **USDT (pegged):** 0x173462F5eb7CA0D1ab6aaea846fEFe85A28029E2
* **BTC (pegged):** `0x2F4632ABAd26A1FF9212a76597fb3c3d8539E275`
* **ETH (pegged):** `0x02D129c8A26839c814925eE0f1D320F63114E1FE`

### GRX Chain — Testnet

* **Network Name:** GRX Chain Testnet
* **RPC URL:** `https://testnet.grxchain.io`
* **Chain ID:** `2507`
* **Symbol:** `GRX`
* **Block Explorer:** `https://testnet.grxscan.io`
* **Faucet:** `https://faucet.grxchain.io`

### Quick Add (Wallets)

**MetaMask → Add Network (Mainnet)**

* Network: `GRX Chain`
* RPC: `https://rpc.grxchain.io`
* Chain ID: `1110`
* Currency Symbol: `GRX`
* Block Explorer: `https://grxscan.io`

**MetaMask → Add Network (Testnet)**

* Network: `GRX Chain Testnet`
* RPC: `https://testnet.grxchain.io`
* Chain ID: `2507`
* Currency Symbol: `GRX`
* Block Explorer: `https://testnet.grxscan.io`


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