buildSolanaTransaction

Future<PortalBuildSolanaTransactionResponse> buildSolanaTransaction({
  required String chainId,
  required String to,
  required String token,
  required String amount,
})

import 'package:portal_flutter/portal_flutter.dart';

final portal = Portal();

final response = await portal.buildSolanaTransaction(
  chainId: 'solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp',
  to: 'GxvUWHWwMpep8e6tXvVdaRmwEzKcUjhLYLhpXhS6wQtY',
  token: 'SOL',
  amount: '0.5',
);

if (response.error != null) {
  throw Exception('Failed to build transaction: ${response.error}');
}

print('Amount: ${response.metadata.amount} SOL');
print('From: ${response.metadata.fromAddress}');
print('To: ${response.metadata.toAddress}');
print('Serialized transaction: ${response.transaction}');

final response = await portal.buildSolanaTransaction(
  chainId: 'solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp',
  to: 'GxvUWHWwMpep8e6tXvVdaRmwEzKcUjhLYLhpXhS6wQtY',
  token: 'EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v', // USDC mint
  amount: '100',
);

final symbol = response.metadata.tokenSymbol ?? 'Unknown';
print('Token: $symbol');
print('Mint: ${response.metadata.tokenAddress}');
print('Decimals: ${response.metadata.tokenDecimals}');

final built = await portal.buildSolanaTransaction(
  chainId: 'solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp',
  to: recipient,
  token: 'SOL',
  amount: '0.1',
);

if (built.error != null) {
  throw Exception(built.error);
}

final signResponse = await portal.request(
  chainId: 'solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp',
  method: 'sol_signAndSendTransaction',
  params: [built.transaction], // base64-encoded serialized transaction
);

// portal.request returns a PortalProviderResponse with String? result + String? error.
if (signResponse.error != null) {
  throw Exception('sol_signAndSendTransaction failed: ${signResponse.error}');
}

print('Solana signature: ${signResponse.result}');

try {
  final response = await portal.buildSolanaTransaction(
    chainId: 'solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp',
    to: recipient,
    token: 'SOL',
    amount: '0.1',
  );
} on PortalException catch (e) {
  print('Build failed: ${e.code} - ${e.message}');
}