1 // Copyright 2023 Google LLC 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // https://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 #ifndef ANONYMOUS_TOKENS_CPP_CRYPTO_BLIND_SIGNER_H_ 16 #define ANONYMOUS_TOKENS_CPP_CRYPTO_BLIND_SIGNER_H_ 17 18 #include <string> 19 20 #include "absl/status/statusor.h" 21 #include "absl/strings/string_view.h" 22 23 24 namespace anonymous_tokens { 25 26 class BlindSigner { 27 public: 28 virtual absl::StatusOr<std::string> Sign( 29 absl::string_view blinded_data) const = 0; 30 31 virtual ~BlindSigner() = default; 32 }; 33 34 } // namespace anonymous_tokens 35 36 37 #endif // ANONYMOUS_TOKENS_CPP_CRYPTO_BLIND_SIGNER_H_ 38