work on exposing bloom filters for bitcore.
This commit is contained in:
Christopher Jeffrey
parent
908a415e50
commit
0f074777e7
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@ -2495,6 +2495,176 @@ async_block_time_after(uv_work_t *req) {
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delete req;
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}
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/home/chjj/work/node_modules/bitcore/lib/Bloom.js
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/home/chjj/bitcoin/src/bloom.cpp
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/home/chjj/bitcoin/src/bloom.h
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static const unsigned int MAX_BLOOM_FILTER_SIZE = 36000; // bytes
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static const unsigned int MAX_HASH_FUNCS = 50;
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/**
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* BloomCreate()
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* bitcoindjs.createBloom()
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* Create bloom filter
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*/
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NAN_METHOD(BloomCreate) {
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NanScope();
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// if (SHUTTING_DOWN()) NanReturnValue(Undefined());
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var LN2SQUARED = 0.4804530139182014246671025263266649717305529515945455;
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var LN2 = 0.6931471805599453094172321214581765680755001343602552;
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var bit_mask = [0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80];
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if (args.Length() > 0) {
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return NanThrowError(
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"Usage: bitcoindjs.bloomCreate()");
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}
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Local<Object> filter = NanNew<Object>();
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CBloomFilter cfilter;
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CDataStream ssFilter(SER_NETWORK, PROTOCOL_VERSION);
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ssFilter << cfilter;
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std::string strHex = HexStr(ssBlock.begin(), ssBlock.end());
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filter->Set(NanNew<String>("hex"), NanNew<String>(strHex));
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filter->Set(NanNew<String>("data"), NanNew<Array>());
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filter->Set(NanNew<String>("hashFuncs"), NanNew<Number>(0));
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NanReturnValue(filter);
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}
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NAN_METHOD(BloomHash) {
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NanScope();
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// if (SHUTTING_DOWN()) NanReturnValue(Undefined());
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if (args.Length() > 1) {
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return NanThrowError(
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"Usage: bitcoindjs.bloomHash(filter)");
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}
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CBloomFilter cfilter;
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String::AsciiValue hex_string_(jstx->Get(NanNew<String>("hex"))->ToString());
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std::string hex_string = *hex_string_;
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CDataStream ssData(ParseHex(hex_string), SER_NETWORK, PROTOCOL_VERSION);
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try {
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ssData >> cfilter;
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} catch (std::exception &e) {
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NanThrowError("Bad BloomFilter decode");
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return;
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}
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std::vector<unsigned char> vDataToHash;
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unsigned int nHashNum = 0;
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cfilter.Hash(nHashNum, vDataToHash);
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NanReturnValue(NanNew<String>(vDataToHash));
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}
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NAN_METHOD(BloomInsert) {
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NanScope();
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// if (SHUTTING_DOWN()) NanReturnValue(Undefined());
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if (args.Length() < 2) {
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return NanThrowError(
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"Usage: bitcoindjs.bloomInsert(filter, hash)");
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}
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Local<Object> filter = Local<Object>::Cast(args[0]);
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String::Utf8Value s_(args[1]->ToString());
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std::string js_hash = std::string(*s_);
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uint256 hash(js_hash);
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CBloomFilter cfilter;
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String::AsciiValue hex_string_(filter->Get(NanNew<String>("hex"))->ToString());
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std::string hex_string = *hex_string_;
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CDataStream ssData(ParseHex(hex_string), SER_NETWORK, PROTOCOL_VERSION);
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try {
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ssData >> cfilter;
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} catch (std::exception &e) {
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NanThrowError("Bad BloomFilter decode");
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return;
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}
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//vector<unsigned char> vKey;
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//COutPoint outpoint;
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//uint256 hash;
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cfilter.insert(hash);
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CDataStream ss(SER_NETWORK, PROTOCOL_VERSION);
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ss << cfilter;
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std::string strHex = HexStr(ss.begin(), ss.end());
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if (cfilter.isFull) NanReturnValue(NanNew<Boolean>(false));
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if (!cfilter.isEmpty) NanReturnValue(NanNew<Boolean>(true));
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NanReturnValue(NanNew<Boolean>(true));
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}
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NAN_METHOD(BloomContains) {
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NanScope();
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// if (SHUTTING_DOWN()) NanReturnValue(Undefined());
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if (args.Length() < 1) {
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return NanThrowError(
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"Usage: bitcoindjs.bloomContains(vKey)");
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}
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CBloomFilter cfilter;
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String::AsciiValue hex_string_(jstx->Get(NanNew<String>("hex"))->ToString());
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std::string hex_string = *hex_string_;
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CDataStream ssData(ParseHex(hex_string), SER_NETWORK, PROTOCOL_VERSION);
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try {
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ssData >> cfilter;
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} catch (std::exception &e) {
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NanThrowError("Bad BloomFilter decode");
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return;
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}
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vector<unsigned char> vKey;
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bool contained = cfilter.contains(vKey);
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NanReturnValue(NanNew<Boolean>(contained));
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}
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NAN_METHOD(BloomSize) {
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NanScope();
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// if (SHUTTING_DOWN()) NanReturnValue(Undefined());
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if (args.Length() > 0) {
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return NanThrowError(
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"Usage: bitcoindjs.bloomSize()");
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}
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CBloomFilter cfilter;
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String::AsciiValue hex_string_(jstx->Get(NanNew<String>("hex"))->ToString());
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std::string hex_string = *hex_string_;
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CDataStream ssData(ParseHex(hex_string), SER_NETWORK, PROTOCOL_VERSION);
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try {
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ssData >> cfilter;
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} catch (std::exception &e) {
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NanThrowError("Bad BloomFilter decode");
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return;
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}
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bool size_ok = cfilter.IsWithinSizeConstraints();
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NanReturnValue(NanNew<Boolean>(size_ok));
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}
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/**
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* GetLastFileIndex()
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* bitcoindjs.getLastFileIndex()
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