isValidAuthenticate static method

bool isValidAuthenticate(SessionAuthRequestParams params)

Implementation

static bool isValidAuthenticate(SessionAuthRequestParams params) {
  if (params.chains.isEmpty) {
    throw Errors.getInternalError(
      Errors.MISSING_OR_INVALID,
      context: 'authenticate() invalid chains: Must not be emtpy.',
    ).toSignError();
  }

  if (!NamespaceUtils.isValidUrl(params.uri)) {
    throw Errors.getInternalError(
      Errors.MISSING_OR_INVALID,
      context:
          'authenticate() invalid uri: ${params.uri}. Must be a valid url.',
    ).toSignError();
  }

  if (params.nonce.isEmpty) {
    throw Errors.getInternalError(
      Errors.MISSING_OR_INVALID,
      context: 'authenticate() nonce must be nonempty.',
    ).toSignError();
  }

  if (params.type != null && params.type!.t != CacaoHeader.EIP4361) {
    throw Errors.getInternalError(
      Errors.MISSING_OR_INVALID,
      context: 'authenticate() type must null or ${CacaoHeader.EIP4361}.',
    ).toSignError();
  }

  final uniqueNamespaces = params.chains.map((chain) {
    return NamespaceUtils.getNamespaceFromChain(chain);
  }).toSet();
  if (uniqueNamespaces.length > 1) {
    throw Errors.getInternalError(
      Errors.NON_CONFORMING_NAMESPACES,
      context:
          'authenticate() Multi-namespace requests are not supported. Please request single namespace only.',
    ).toSignError();
  }

  final isValidChainId = NamespaceUtils.isValidChainId(params.chains.first);
  if (!isValidChainId) {
    throw Errors.getInternalError(
      Errors.NON_CONFORMING_NAMESPACES,
      context: 'authenticate() chainId should conform to "CAIP-2" format',
    ).toSignError();
  }

  final namespace = NamespaceUtils.getNamespaceFromChain(params.chains.first);
  if (namespace != 'eip155') {
    throw Errors.getInternalError(
      Errors.NON_CONFORMING_NAMESPACES,
      context:
          'authenticate() Only eip155 namespace is supported for authenticated sessions. Please use .connect() for non-eip155 chains.',
    ).toSignError();
  }

  return true;
}