Solana

import { CrossmintWallets, WalletsApiClient, createCrossmint, SolanaWallet } from "@crossmint/wallets-sdk";
import { Keypair } from "@solana/web3.js";
import nacl from "tweetnacl";
import bs58 from "bs58";

const crossmint = createCrossmint({
    apiKey: "<your-server-api-key>",
});

const crossmintWallets = CrossmintWallets.from(crossmint);
const apiClient = new WalletsApiClient(crossmint);

const keypair = Keypair.fromSecretKey(
    bs58.decode(process.env.EXTERNAL_WALLET_PRIVATE_KEY!)
);

const wallet = await crossmintWallets.getWallet(
    "<wallet-address>",
    { chain: "solana", signer: { type: "external-wallet" } }
);

const solanaWallet = SolanaWallet.from(wallet);

// 1. Create the transaction in prepare-only mode
const { transactionId } = await solanaWallet.sendTransaction(
    {
        transaction: versionedTransaction, // your VersionedTransaction instance
    },
    {
        experimental_prepareOnly: true,
        experimental_signer: `external-wallet:${keypair.publicKey.toBase58()}`,
    }
);

// 2. Fetch the pending transaction to get the message that needs signing
const txResponse = await apiClient.getTransaction(wallet.address, transactionId);
if ("error" in txResponse) {
    throw new Error(`Failed to get transaction: ${JSON.stringify(txResponse)}`);
}

const pendingApproval = txResponse.approvals?.pending[0];
if (!pendingApproval) {
    throw new Error("No pending approval found");
}

// 3. Sign the pending approval message with your Solana keypair
const messageBytes = Buffer.from(pendingApproval.message, "base64");
const sig = nacl.sign.detached(messageBytes, keypair.secretKey);
const signature = Buffer.from(sig).toString("base64");

// 4. Submit the approval
const result = await wallet.approve({
    transactionId,
    options: {
        experimental_approval: {
            signature,
            signer: `external-wallet:${keypair.publicKey.toBase58()}`,
        },
    },
});

console.log("Transaction approved:", result);

import { useWallet, SolanaWallet } from '@crossmint/client-sdk-react-native-ui';

const { wallet } = useWallet();

const solanaWallet = SolanaWallet.from(wallet);

const { hash, explorerLink } = await solanaWallet.sendTransaction({
    transaction: versionedTransaction,
    additionalSigners: additionalSigners,
});

import CrossmintClient
import Wallet

let sdk = CrossmintSDK.shared

let wallet = try await sdk.crossmintWallets.getOrCreateWallet(
    chain: .solana,
    signer: .email("user@example.com")
)

let solanaWallet = try SolanaWallet.from(wallet: wallet)

let result = try await solanaWallet.sendTransaction(transaction)