createSignature method
Implementation
Future<CrossmintJsonMap> createSignature(
String walletLocator,
CrossmintJsonMap payload,
) async {
final response = await transport.post(
'${CrossmintApiVersions.wallets}/wallets/$walletLocator/signatures',
options: request(body: payload),
);
return expectSuccessfulMap(
response,
CrossmintWalletException.new,
operation: 'create wallet signature',
);
}