128 lines
3.4 KiB
C++
128 lines
3.4 KiB
C++
#include <graphene/peerplays_sidechain/ethereum/encoders.hpp>
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#include <stdlib.h>
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#include <boost/algorithm/hex.hpp>
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#include <boost/format.hpp>
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namespace graphene { namespace peerplays_sidechain { namespace ethereum {
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//! base_encoder
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std::string base_encoder::encode_uint256(boost::multiprecision::uint256_t value)
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{
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return (boost::format("%x") % boost::io::group(std::setw(64), std::setfill('0'), value)).str();
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}
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std::string base_encoder::encode_address(const std::string& value)
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{
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return (boost::format("%x") % boost::io::group(std::setw(64), std::setfill('0'), value)).str();
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}
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std::string base_encoder::encode_string(const std::string& value)
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{
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std::string data = (boost::format("%x") % boost::io::group(std::setw(64), std::setfill('0'), value.size())).str();
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data += boost::algorithm::hex(value) + std::string( (64 - value.size() * 2 % 64), '0' );
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return data;
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}
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//! update_owners_encoder
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std::string update_owners_encoder::encode(const std::vector<std::pair<std::string, uint16_t>>& owners_weights, const std::string& object_id) const
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{
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std::string data = "0x" + function_signature;
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data += base_encoder::encode_uint256(64);
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data += base_encoder::encode_uint256((owners_weights.size() * 2 + 3) * 32);
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data += base_encoder::encode_uint256(owners_weights.size());
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for(const auto& owner : owners_weights)
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{
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data += base_encoder::encode_address(owner.first);
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data += base_encoder::encode_uint256(owner.second);
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}
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data += base_encoder::encode_string(object_id);
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return data;
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}
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//! withdrawal_encoder
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std::string withdrawal_encoder::encode(const std::string& to, boost::multiprecision::uint256_t amount, const std::string& object_id) const
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{
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std::string data = "0x" + function_signature;
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data += base_encoder::encode_address(to);
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data += base_encoder::encode_uint256(amount);
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data += base_encoder::encode_uint256(32*3);
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data += base_encoder::encode_string(object_id);
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return data;
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}
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//! rlp_encoder
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std::string rlp_encoder::encode(const std::string& s)
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{
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return encode_rlp(hex2bytes(s));
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}
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std::string rlp_encoder::encode_length(int len, int offset)
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{
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if(len<56)
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{
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std::string temp;
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temp=(char)(len+offset);
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return temp;
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}
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else
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{
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const std::string hexLength = int2Hex(len);
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const int lLength = hexLength.size()/2;
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const std::string fByte = int2Hex(offset+55+lLength);
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return hex2bytes(fByte+hexLength);
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}
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}
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std::string rlp_encoder::hex2bytes(const std::string& s)
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{
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std::string dest;
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dest.resize(s.size()/2);
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hex2bin(s.c_str(), &dest[0]);
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return dest;
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}
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std::string rlp_encoder::encode_rlp(const std::string& s)
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{
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if(s.size()==1 && (unsigned char)s[0]<128)
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return s;
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else
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return encode_length(s.size(), 128) + s;
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}
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std::string rlp_encoder::int2Hex(int n)
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{
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std::stringstream stream;
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stream << std::hex << n;
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std::string result( stream.str() );
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if(result.size() % 2)
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result = "0"+result;
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return result;
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}
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int rlp_encoder::char2int(char input)
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{
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if(input >= '0' && input <= '9')
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return input - '0';
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if(input >= 'A' && input <= 'F')
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return input - 'A' + 10;
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if(input >= 'a' && input <= 'f')
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return input - 'a' + 10;
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return -1;
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}
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void rlp_encoder::hex2bin(const char* src, char* target)
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{
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while(*src && src[1])
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{
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*(target++) = char2int(*src)*16 + char2int(src[1]);
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src += 2;
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}
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}
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}}} // namespace graphene::peerplays_sidechain::ethereum
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