# Metamask Cosmos Snap

### **Installation**

To either establish a connection or initiate an installation followed by a connection to the **`metamask-cosmos-snap`**, execute the following code:

```javascript

try {
  const result = await window.ethereum.request({
    method: 'wallet_requestSnaps',
    params: {
      'npm:@leapwallet/metamask-cosmos-snap': {},
    },
  });

  console.log(result);

} catch (error) {
  console.log(error);
}

```

For the official docs on connecting or installing a Metamask snap, refer [**here**](https://docs.metamask.io/snaps/reference/rpc-api/#wallet_requestsnaps).

### **Methods**

### 1. **Get Keys**

The **`getKey`** method retrieves the wallet's public address corresponding to a specific chain ID. Currently, we support chains of coin type 118.

**Usage:**

```javascript
const accountData = await window.ethereum.request({
  method: 'wallet_invokeSnap',
  params: {
    snapId: "npm:@leapwallet/metamask-cosmos-snap",
    request: {
      method: 'getKey',
      params: {
        chainId,
      },
    },
  },
});

```

### 2. **Sign Direct**

Utilize the **`signDirect`** method to sign transactions or **`signDoc`** using the connected wallet.

**Usage:**

```javascript
await window.ethereum.request({
  method: 'wallet_invokeSnap',
  params: {
    snapId: "npm:@leapwallet/metamask-cosmos-snap",
    request: {
      method: 'signDirect',
      params: {
        chainId,
        signerAddress,
        signDoc,
      },
    },
  },
});
```

### 3. Suggest Chain

Utilize the **`suggestChain`** method to suggest any chains of coin types 118,

**Usage:**

```
await window.ethereum.request({
  method: 'wallet_invokeSnap',
  params: {
    snapId: 'local:http://localhost:8000',
    request: {
      method: 'suggestChain',
      params: {
        chainInfo: {
          chainId: 'coreum-mainnet-1',
          chainName: 'coreum',
          bech32Config: {
            bech32PrefixAccAddr: 'core',
          },
          bip44: {
            coinType: 990,
          },
          feeCurrencies: [
          {
            coinDenom: "ucore",
            coinMinimalDenom: "ucore",
            coinDecimals: 6,
            coinGeckoId: "coreum",
            gasPriceStep: {
              low: 0.0625,
              average: 0.5,
              high: 62.5,
            },
          },
        ],
        }
      },
    },
  },
});
```