async sendSolanaTransaction(params: {
    walletAddress: string;
    walletId: string;
    tokenAddress?: string;
    to: string;
    amount: bigint;
    isNative: boolean;
  }): Promise<{ hash: string; status: 'success' | 'failed' }> {
    try {
      const transaction = await solanaService.preparePrivyTransaction({
        senderAddress: params.walletAddress,
        recipientAddress: params.to,
        tokenMint: params.tokenAddress,
        amount: params.amount,
        isNative: params.isNative,
      });

      const response =
        await this.client.walletApi.solana.signAndSendTransaction({
          walletId: params.walletId,
          caip2: 'solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp',
          transaction,
        });

      if (!response || !response.hash) {
        throw new Error('No transaction hash received');
      }

      return {
        hash: response.hash,
        status: 'success',
      };
    } catch (error) {
      console.error('❌ Error sending Solana transaction:', error);
      throw error;
    }
  }