> For the complete documentation index, see [llms.txt](https://cramiumlabs.gitbook.io/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://cramiumlabs.gitbook.io/docs/sdk-mpc-android/usage-guide-for-an-mpc-wallet-app/creating-an-mpc-wallet.md).

# Creating an MPC wallet

#### MPC Wallet

To generate a new MPC wallet using the `createMpcWallet()` method, This process generates shards, including: 

\- `name`: The name of master wallet \
\- `numParties` child wallet keys \
\- `wallets`: A list of MpcKeyGenWallet to perform keygen. Each item requires: \
        \- `derivationPath`: The derivation Path of Wallet. \
        \- `ChainId`: The chain name (e.g., ethereum, solana). \
        \- `ecType`: The cryptographic algorithm type (eddsa, ecdsa).

```
Additional Notes:
    - Use Trust Wallet Core to derive the `secret` using the Derivation Path.
        - CoinType.ethereum
        - CoinType.solana
        - CoinType.arbitrum
        - More coins : https://trustwallet.github.io/docc/documentation/walletcore/cointype/
    - Refer to the Trust Wallet Registry for `ChainId` and `ecType`: https://github.com/trustwallet/wallet-core/blob/master/registry.json
```

**Example**:

```kotlin

val walletResponse = client.createMpcWallet(
    name = "KeyGenGroupID123",
    numParties = 2,
    wallets = listOf(
        MpcKeyGenWallet(
            derivationPath = "m/84/0/0/0/0",
            chainId = "ethereum",
            ecType = "ecdsa"
        )
    )
)
walletResponse.masterWallets.forEach { masterWallet ->
    masterWallet.forEach { wallet
        println("keyIdentity: ${wallet.keyIdentity} - ecType: ${wallet.ecType} - address: ${wallet.address}")
    }
}

```

#### Mnemonic Compatible MPC Wallet

To generate a new MPC wallet using the `createMnemonicWallet()` method, This process generates shards, including: - `name`: The name of master wallet - `Mnemonic`: The mnemonic phrase generated by the mobile app. - `numParties` child wallet keys - `wallets`: A list of KeyGenWallet to perform keygen. Each item requires: - `secret`: The private key of the Child Wallet (derived from the mnemonic phrase). - `walletAddress`: The public address or public key of the Child Wallet. - `ChainId`: The chain name (e.g., ethereum, solana). - `ecType`: The cryptographic algorithm type (eddsa, ecdsa).

```
Additional Notes:
    - When receiving the backup from `createMpcWallet()`, please ensure that the server shards of the newly created Paillier group and Keygen group are stored in a safe and secure location.
    - Use Trust Wallet Core to derive the `secret` using the Derivation Path.
        - CoinType.ethereum
        - CoinType.solana
        - CoinType.arbitrum
        - More coins : https://trustwallet.github.io/docc/documentation/walletcore/cointype/
    - Refer to the Trust Wallet Registry for `ChainId` and `ecType`: https://github.com/trustwallet/wallet-core/blob/master/registry.json
```

**Example**:

```kotlin

val walletResponse = client.createMnemonicWallet(
    name = "KeyGenGroupID123",
    numParties = 2,
    mnemonicPhrase = "your mnemonic phrase here",
    wallets = listOf(
        KeyGenWallet(
            secret = "derived private key",
            walletAddress = "0xYourWalletAddress",
            chainId = "ethereum",
            ecType = "ecdsa"
        )
    )
)
walletResponse.masterWallets.forEach { masterWallet ->
    masterWallet.forEach { wallet
        println("keyIdentity: ${wallet.keyIdentity} - ecType: ${wallet.ecType} - address: ${wallet.address}")
    }
}

```

#### Signing MPC

To create an Sign MPC, use the `SigningRequest` with the following attributes:

* create a new Build `SigningRequest` should include the following attributes:
  * `derivationPath` : The derivation Path of Wallet.
  * `message` : Your message
  * `paillierGroupID` : User's Paillier group ID.
  * `keyGenGroupID` : the keygen Group ID of master wallet
  * `keyIdentity` : the keyIdentity of wallet
  * `ecType`: Cryptographic algorithm type (e.g., `eddsa`, `ecdsa`)

**Example**:

```kotlin
    val signingReq = SigningRequest(
        derivationPath = "m/84/0/0/0/0",
        message = 'Hello Wallet',
        paillierGroupID = "paillierGroupID",
        keyGenGroupID = "keyGenGroupID",
        keyIdentity = "walletKeyIdentity",
        ecType = "ecdsa"
    )
    val signMessage = client.signing(signingReq)
```


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