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59 lines
3 KiB
C++
59 lines
3 KiB
C++
// Copyright (c) 2020 The Elements Core developers
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// // Distributed under the MIT software license, see the accompanying
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// // file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#ifndef BITCOIN_BLINDPSBT_H
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#define BITCOIN_BLINDPSBT_H
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#include <blind.h>
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#include <key.h>
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#include <pubkey.h>
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#include <primitives/transaction.h>
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#include <primitives/confidential.h>
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#include <secp256k1.h>
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#include <secp256k1_rangeproof.h>
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#include <secp256k1_surjectionproof.h>
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struct PartiallySignedTransaction;
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struct PSBTOutput;
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struct PSBTInput;
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enum class BlindingStatus
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{
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OK, //!< No error
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NEEDS_UTXOS,
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INVALID_ASSET,
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INVALID_ASSET_COMMITMENT,
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SCALAR_UNABLE,
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INVALID_BLINDER,
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ASP_UNABLE,
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NO_BLIND_OUTPUTS,
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};
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enum class BlindProofResult {
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OK,
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NOT_FULLY_BLINDED,
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MISSING_VALUE_PROOF,
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MISSING_ASSET_PROOF,
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INVALID_VALUE_PROOF,
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INVALID_ASSET_PROOF,
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};
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std::string GetBlindingStatusError(const BlindingStatus& status);
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bool CreateAssetSurjectionProof(std::vector<unsigned char>& output_proof, const std::vector<secp256k1_fixed_asset_tag>& fixed_input_tags, const std::vector<secp256k1_generator>& ephemeral_input_tags, const std::vector<uint256>& input_asset_blinders, const uint256& output_asset_blinder, const secp256k1_generator& output_asset_tag, const CAsset& asset, size_t num_targets = MAX_SURJECTION_TARGETS);
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uint256 GenerateRangeproofECDHKey(CPubKey& ephemeral_pubkey, const CPubKey blinding_pubkey);
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bool CreateValueRangeProof(std::vector<unsigned char>& rangeproof, const uint256& value_blinder, const uint256& nonce, const CAmount amount, const CScript& scriptPubKey, const secp256k1_pedersen_commitment& value_commit, const secp256k1_generator& gen, const CAsset& asset, const uint256& asset_blinder);
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void CreateAssetCommitment(CConfidentialAsset& conf_asset, secp256k1_generator& asset_gen, const CAsset& asset, const uint256& asset_blinder);
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void CreateValueCommitment(CConfidentialValue& conf_value, secp256k1_pedersen_commitment& value_commit, const uint256& value_blinder, const secp256k1_generator& asset_gen, const CAmount amount);
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BlindingStatus BlindPSBT(PartiallySignedTransaction& psbt, std::map<uint32_t, std::tuple<CAmount, CAsset, uint256, uint256>> our_input_data, std::map<uint32_t, std::pair<CKey, CKey>> our_issuances_to_blind);
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bool CreateBlindValueProof(std::vector<unsigned char>& rangeproof, const uint256& value_blinder, const CAmount amount, const CConfidentialValue& conf_value, const CConfidentialAsset& conf_asset);
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bool CreateBlindAssetProof(std::vector<unsigned char>& assetproof, const CAsset& asset, const CConfidentialAsset& asset_commit, const uint256& asset_blinder);
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bool VerifyBlindValueProof(CAmount value, const CConfidentialValue& conf_value, const std::vector<unsigned char>& proof, const CConfidentialAsset& conf_asset);
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bool VerifyBlindAssetProof(const uint256& asset, const std::vector<unsigned char>& proof, const CConfidentialAsset& conf_asset);
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BlindProofResult VerifyBlindProofs(const PSBTOutput& o);
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BlindProofResult VerifyBlindProofs(const PSBTInput& i);
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#endif // BITCOIN_BLINDPSBT_H
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