213 lines
7.1 KiB
C++
213 lines
7.1 KiB
C++
#include <node.h>
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#include <node_buffer.h>
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#include <v8.h>
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#include <stdint.h>
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#include <string>
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#include <algorithm>
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#include "cryptonote_core/cryptonote_basic.h"
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#include "cryptonote_core/cryptonote_format_utils.h"
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#include "cryptonote_protocol/blobdatatype.h"
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#include "crypto/crypto.h"
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#include "crypto/hash.h"
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#include "common/base58.h"
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using namespace node;
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using namespace v8;
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using namespace cryptonote;
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Handle<Value> except(const char* msg) {
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return ThrowException(Exception::Error(String::New(msg)));
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}
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blobdata uint64be_to_blob(uint64_t num) {
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blobdata res = " ";
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res[0] = num >> 56 & 0xff;
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res[1] = num >> 48 & 0xff;
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res[2] = num >> 40 & 0xff;
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res[3] = num >> 32 & 0xff;
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res[4] = num >> 24 & 0xff;
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res[5] = num >> 16 & 0xff;
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res[6] = num >> 8 & 0xff;
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res[7] = num & 0xff;
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return res;
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}
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static bool fillExtra(cryptonote::block& block1, const cryptonote::block& block2) {
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cryptonote::tx_extra_merge_mining_tag mm_tag;
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mm_tag.depth = 0;
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if (!cryptonote::get_block_header_hash(block2, mm_tag.merkle_root))
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return false;
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block1.miner_tx.extra.clear();
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if (!cryptonote::append_mm_tag_to_extra(block1.miner_tx.extra, mm_tag))
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return false;
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return true;
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}
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static bool mergeBlocks(const cryptonote::block& block1, cryptonote::block& block2, const std::vector<crypto::hash>& branch2) {
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block2.timestamp = block1.timestamp;
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block2.parent_block.major_version = block1.major_version;
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block2.parent_block.minor_version = block1.minor_version;
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block2.parent_block.prev_id = block1.prev_id;
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block2.parent_block.nonce = block1.nonce;
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block2.parent_block.miner_tx = block1.miner_tx;
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block2.parent_block.number_of_transactions = block1.tx_hashes.size() + 1;
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block2.parent_block.miner_tx_branch.resize(crypto::tree_depth(block1.tx_hashes.size() + 1));
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std::vector<crypto::hash> transactionHashes;
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transactionHashes.push_back(cryptonote::get_transaction_hash(block1.miner_tx));
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std::copy(block1.tx_hashes.begin(), block1.tx_hashes.end(), std::back_inserter(transactionHashes));
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tree_branch(transactionHashes.data(), transactionHashes.size(), block2.parent_block.miner_tx_branch.data());
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block2.parent_block.blockchain_branch = branch2;
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return true;
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}
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static bool construct_parent_block(const cryptonote::block& b, cryptonote::block& parent_block) {
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parent_block.major_version = 1;
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parent_block.minor_version = 0;
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parent_block.timestamp = b.timestamp;
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parent_block.prev_id = b.prev_id;
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parent_block.nonce = b.parent_block.nonce;
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parent_block.miner_tx.version = CURRENT_TRANSACTION_VERSION;
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parent_block.miner_tx.unlock_time = 0;
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return fillExtra(parent_block, b);
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}
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Handle<Value> convert_blob(const Arguments& args) {
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HandleScope scope;
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if (args.Length() < 1)
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return except("You must provide one argument.");
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Local<Object> target = args[0]->ToObject();
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if (!Buffer::HasInstance(target))
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return except("Argument should be a buffer object.");
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blobdata input = std::string(Buffer::Data(target), Buffer::Length(target));
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blobdata output = "";
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//convert
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block b = AUTO_VAL_INIT(b);
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if (!parse_and_validate_block_from_blob(input, b))
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return except("Failed to parse block");
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if (b.major_version < BLOCK_MAJOR_VERSION_2) {
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if (!get_block_hashing_blob(b, output))
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return except("Failed to create mining block");
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} else {
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block parent_block;
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if (!construct_parent_block(b, parent_block))
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return except("Failed to construct parent block");
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if (!get_block_hashing_blob(parent_block, output))
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return except("Failed to create mining block");
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}
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Buffer* buff = Buffer::New(output.data(), output.size());
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return scope.Close(buff->handle_);
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}
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Handle<Value> construct_block_blob(const Arguments& args) {
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HandleScope scope;
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if (args.Length() < 2)
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return except("You must provide two arguments.");
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Local<Object> block_template_buf = args[0]->ToObject();
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Local<Object> nonce_buf = args[1]->ToObject();
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if (!Buffer::HasInstance(block_template_buf) || !Buffer::HasInstance(nonce_buf))
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return except("Both arguments should be buffer objects.");
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if (Buffer::Length(nonce_buf) != 4)
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return except("Nonce buffer has invalid size.");
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uint32_t nonce = *reinterpret_cast<uint32_t*>(Buffer::Data(nonce_buf));
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blobdata block_template_blob = std::string(Buffer::Data(block_template_buf), Buffer::Length(block_template_buf));
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blobdata output = "";
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block b = AUTO_VAL_INIT(b);
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if (!parse_and_validate_block_from_blob(block_template_blob, b))
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return except("Failed to parse block");
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b.nonce = nonce;
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if (b.major_version == BLOCK_MAJOR_VERSION_2) {
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block parent_block;
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b.parent_block.nonce = nonce;
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if (!construct_parent_block(b, parent_block))
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return except("Failed to construct parent block");
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if (!mergeBlocks(parent_block, b, std::vector<crypto::hash>()))
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return except("Failed to postprocess mining block");
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}
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if (!block_to_blob(b, output))
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return except("Failed to convert block to blob");
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Buffer* buff = Buffer::New(output.data(), output.size());
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return scope.Close(buff->handle_);
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}
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Handle<Value> convert_blob_bb(const Arguments& args) {
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HandleScope scope;
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if (args.Length() < 1)
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return except("You must provide one argument.");
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Local<Object> target = args[0]->ToObject();
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if (!Buffer::HasInstance(target))
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return except("Argument should be a buffer object.");
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blobdata input = std::string(Buffer::Data(target), Buffer::Length(target));
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blobdata output = "";
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//convert
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bb_block b = AUTO_VAL_INIT(b);
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if (!parse_and_validate_block_from_blob(input, b)) {
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return except("Failed to parse block");
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}
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output = get_block_hashing_blob(b);
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Buffer* buff = Buffer::New(output.data(), output.size());
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return scope.Close(buff->handle_);
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}
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Handle<Value> address_decode(const Arguments& args) {
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HandleScope scope;
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if (args.Length() < 1)
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return except("You must provide one argument.");
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Local<Object> target = args[0]->ToObject();
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if (!Buffer::HasInstance(target))
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return except("Argument should be a buffer object.");
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blobdata input = std::string(Buffer::Data(target), Buffer::Length(target));
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blobdata output = "";
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uint64_t prefix;
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tools::base58::decode_addr(input, prefix, output);
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if(output.length())
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output = uint64be_to_blob(prefix) + output;
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Buffer* buff = Buffer::New(output.data(), output.size());
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return scope.Close(buff->handle_);
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}
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void init(Handle<Object> exports) {
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exports->Set(String::NewSymbol("construct_block_blob"), FunctionTemplate::New(construct_block_blob)->GetFunction());
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exports->Set(String::NewSymbol("convert_blob"), FunctionTemplate::New(convert_blob)->GetFunction());
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exports->Set(String::NewSymbol("convert_blob_bb"), FunctionTemplate::New(convert_blob_bb)->GetFunction());
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exports->Set(String::NewSymbol("address_decode"), FunctionTemplate::New(address_decode)->GetFunction());
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}
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NODE_MODULE(cryptonote, init)
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