105 lines
4 KiB
C++
105 lines
4 KiB
C++
#include <sidechain/btc_multisig_address.hpp>
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#include <sstream>
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#include <fc/crypto/base58.hpp>
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namespace sidechain {
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btc_multisig_address::btc_multisig_address( const size_t n_required, const accounts_keys& keys ) :
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keys_required ( n_required ), witnesses_keys( keys )
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{
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create_redeem_script();
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create_address();
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}
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size_t btc_multisig_address::count_intersection( const accounts_keys& keys ) const
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{
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FC_ASSERT( keys.size() > 0 );
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int intersections_count = 0;
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for( auto& key : keys ) {
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auto witness_key = witnesses_keys.find( key.first );
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if( witness_key == witnesses_keys.end() ) continue;
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if( key.second == witness_key->second )
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intersections_count++;
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}
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return intersections_count;
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}
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void btc_multisig_address::create_redeem_script()
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{
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FC_ASSERT( keys_required > 0 );
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FC_ASSERT( keys_required < witnesses_keys.size() );
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redeem_script.clear();
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redeem_script.push_back( op[keys_required - 1] );
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for( const auto& key : witnesses_keys ) {
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std::stringstream ss;
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ss << std::hex << key.second.key_data.size();
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auto key_size_hex = sidechain::parse_hex( ss.str() );
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redeem_script.insert( redeem_script.end(), key_size_hex.begin(), key_size_hex.end() );
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redeem_script.insert( redeem_script.end(), key.second.key_data.begin(), key.second.key_data.end() );
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}
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redeem_script.push_back( op[witnesses_keys.size() - 1] );
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redeem_script.push_back( OP_CHECKMULTISIG );
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}
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void btc_multisig_address::create_address()
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{
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FC_ASSERT( redeem_script.size() > 0 );
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address.clear();
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fc::sha256 hash256 = fc::sha256::hash( redeem_script.data(), redeem_script.size() );
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fc::ripemd160 hash160 = fc::ripemd160::hash( hash256.data(), hash256.data_size() );
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std::vector<char> temp_addr_hash( sidechain::parse_hex( hash160.str() ) );
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address.push_back( OP_HASH160 );
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std::stringstream ss;
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ss << std::hex << temp_addr_hash.size();
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auto address_size_hex = sidechain::parse_hex( ss.str() );
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address.insert( address.end(), address_size_hex.begin(), address_size_hex.end() );
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address.insert( address.end(), temp_addr_hash.begin(), temp_addr_hash.end() );
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address.push_back( OP_EQUAL );
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}
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btc_multisig_segwit_address::btc_multisig_segwit_address( const size_t n_required, const accounts_keys& keys ) :
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btc_multisig_address( n_required, keys )
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{
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create_witness_script();
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create_segwit_address();
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}
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bool btc_multisig_segwit_address::operator==( const btc_multisig_segwit_address& addr ) const
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{
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if( address != addr.address || redeem_script != addr.redeem_script ||
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witnesses_keys != addr.witnesses_keys || witness_script != addr.witness_script ||
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segwit_address != addr.segwit_address || base58_address != addr.base58_address )
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return false;
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return true;
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}
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void btc_multisig_segwit_address::create_witness_script()
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{
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const auto redeem_sha256 = fc::sha256::hash( redeem_script.data(), redeem_script.size() );
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witness_script.push_back( OP_0 );
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witness_script.push_back( 0x20 ); // PUSH_32
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witness_script.insert( witness_script.end(), redeem_sha256.data(), redeem_sha256.data() + redeem_sha256.data_size() );
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}
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void btc_multisig_segwit_address::create_segwit_address()
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{
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fc::sha256 hash256 = fc::sha256::hash( witness_script.data(), witness_script.size() );
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fc::ripemd160 hash160 = fc::ripemd160::hash( hash256.data(), hash256.data_size() );
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segwit_address = std::vector<char>(hash160.data(), hash160.data() + hash160.data_size() );
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base58_address = fc::to_base58( get_address_bytes( segwit_address ) );
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}
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std::vector<char> btc_multisig_segwit_address::get_address_bytes( const std::vector<char>& script_hash )
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{
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std::vector<char> address_bytes( 1, TESTNET_SCRIPT ); // 1 byte version
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address_bytes.insert( address_bytes.end(), script_hash.begin(), script_hash.end() );
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fc::sha256 hash256 = fc::sha256::hash( fc::sha256::hash( address_bytes.data(), address_bytes.size() ) );
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address_bytes.insert( address_bytes.end(), hash256.data(), hash256.data() + 4 ); // 4 byte checksum
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return address_bytes;
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}
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}
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