Get block hashes by timestamp range

docs/services/db.md

@@ -32,3 +32,14 @@ node.getBlock(blockHash, function(err, block) {
   //...
 });
 ```
+
+Get Block Hashes by Timestamp Range
+
+```js
+var newest = 1441914000; // Notice time is in seconds not milliseconds
+var oldest = 1441911000;
+
+node.getBlockHashesByTimestamp(newest, oldest, function(err, hashes) {
+  //...
+});
+```

lib/services/address/index.js

@@ -35,8 +35,8 @@ AddressService.dependencies = [
 ];
 
 AddressService.PREFIXES = {
-  OUTPUTS: new Buffer('32', 'hex'),
-  SPENTS: new Buffer('33', 'hex')
+  OUTPUTS: new Buffer('02', 'hex'),
+  SPENTS: new Buffer('03', 'hex')
 };
 
 AddressService.SPACER_MIN = new Buffer('00', 'hex');

lib/services/db.js

@@ -60,6 +60,10 @@ util.inherits(DB, Service);
 
 DB.dependencies = ['bitcoind'];
 
+DB.PREFIXES = {
+  BLOCKS: new Buffer('01', 'hex')
+};
+
 DB.prototype._setDataPath = function() {
   $.checkState(this.node.datadir, 'Node is expected to have a "datadir" property');
   var regtest = Networks.get('regtest');
@@ -177,6 +181,7 @@ DB.prototype.transactionHandler = function(txInfo) {
 DB.prototype.getAPIMethods = function() {
   var methods = [
     ['getBlock', this, this.getBlock, 1],
+    ['getBlockHashesByTimestamp', this, this.getBlockHashesByTimestamp, 2],
     ['getTransaction', this, this.getTransaction, 2],
     ['getTransactionWithBlockInfo', this, this.getTransactionWithBlockInfo, 2],
     ['sendTransaction', this, this.sendTransaction, 1],
@@ -194,6 +199,54 @@ DB.prototype.getBlock = function(hash, callback) {
   });
 };
 
+/**
+ * get block hashes between two timestamps
+ * @param {Number} high - high timestamp, in seconds, inclusive
+ * @param {Number} low - low timestamp, in seconds, inclusive
+ * @param {Function} callback
+ */
+DB.prototype.getBlockHashesByTimestamp = function(high, low, callback) {
+  var self = this;
+  var hashes = [];
+
+  try {
+    var lowKey = this._encodeBlockIndexKey(low);
+    var highKey = this._encodeBlockIndexKey(high);
+  } catch(e) {
+    return callback(e);
+  }
+
+  var stream = this.store.createReadStream({
+    gte: lowKey,
+    lte: highKey,
+    reverse: true,
+    valueEncoding: 'binary',
+    keyEncoding: 'binary'
+  });
+
+  stream.on('data', function(data) {
+    hashes.push(self._decodeBlockIndexValue(data.value));
+  });
+
+  var error;
+
+  stream.on('error', function(streamError) {
+    if (streamError) {
+      error = streamError;
+    }
+  });
+
+  stream.on('close', function() {
+    if (error) {
+      return callback(error);
+    }
+
+    callback(null, hashes);
+  });
+
+  return stream;
+};
+
 DB.prototype.getTransaction = function(txid, queryMempool, callback) {
   this.node.services.bitcoind.getTransaction(txid, queryMempool, function(err, txBuffer) {
     if (err) {
@@ -371,6 +424,13 @@ DB.prototype.runAllBlockHandlers = function(block, add, callback) {
     this.subscriptions.block[i].emit('block', block.hash);
   }
 
+  // Update block index
+  operations.push({
+    type: add ? 'put' : 'del',
+    key: this._encodeBlockIndexKey(block.header.timestamp),
+    value: this._encodeBlockIndexValue(block.hash)
+  });
+
   async.eachSeries(
     this.node.services,
     function(mod, next) {
@@ -402,6 +462,21 @@ DB.prototype.runAllBlockHandlers = function(block, add, callback) {
   );
 };
 
+DB.prototype._encodeBlockIndexKey = function(timestamp) {
+  $.checkArgument(timestamp >= 0 && timestamp <= 4294967295, 'timestamp out of bounds');
+  var timestampBuffer = new Buffer(4);
+  timestampBuffer.writeUInt32BE(timestamp);
+  return Buffer.concat([DB.PREFIXES.BLOCKS, timestampBuffer]);
+};
+
+DB.prototype._encodeBlockIndexValue = function(hash) {
+  return new Buffer(hash, 'hex');
+};
+
+DB.prototype._decodeBlockIndexValue = function(value) {
+  return value.toString('hex');
+};
+
 /**
  * This function will find the common ancestor between the current chain and a forked block,
  * by moving backwards from the forked block until it meets the current chain.

test/services/address/index.unit.js

@@ -126,13 +126,13 @@ describe('Address Service', function() {
         should.not.exist(err);
         operations.length.should.equal(81);
         operations[0].type.should.equal('put');
-        operations[0].key.toString('hex').should.equal('3202a61d2066d19e9e2fd348a8320b7ebd4dd3ca2b00000543abfdbefe0d064729d85556bd3ab13c3a889b685d042499c02b4aa2064fb1e1692300000000');
+        operations[0].key.toString('hex').should.equal('0202a61d2066d19e9e2fd348a8320b7ebd4dd3ca2b00000543abfdbefe0d064729d85556bd3ab13c3a889b685d042499c02b4aa2064fb1e1692300000000');
         operations[0].value.toString('hex').should.equal('41e2a49ec1c0000076a91402a61d2066d19e9e2fd348a8320b7ebd4dd3ca2b88ac');
         operations[3].type.should.equal('put');
-        operations[3].key.toString('hex').should.equal('33fdbd324b28ea69e49c998816407dc055fb81d06e00000543ab3d7d5d98df753ef2a4f82438513c509e3b11f3e738e94a7234967b03a03123a900000020');
+        operations[3].key.toString('hex').should.equal('03fdbd324b28ea69e49c998816407dc055fb81d06e00000543ab3d7d5d98df753ef2a4f82438513c509e3b11f3e738e94a7234967b03a03123a900000020');
         operations[3].value.toString('hex').should.equal('5780f3ee54889a0717152a01abee9a32cec1b0cdf8d5537a08c7bd9eeb6bfbca00000000');
         operations[64].type.should.equal('put');
-        operations[64].key.toString('hex').should.equal('329780ccd5356e2acc0ee439ee04e0fe69426c752800000543abe66f3b989c790178de2fc1a5329f94c0d8905d0d3df4e7ecf0115e7f90a6283d00000001');
+        operations[64].key.toString('hex').should.equal('029780ccd5356e2acc0ee439ee04e0fe69426c752800000543abe66f3b989c790178de2fc1a5329f94c0d8905d0d3df4e7ecf0115e7f90a6283d00000001');
         operations[64].value.toString('hex').should.equal('4147a6b00000000076a9149780ccd5356e2acc0ee439ee04e0fe69426c752888ac');
         done();
       });
@@ -149,13 +149,13 @@ describe('Address Service', function() {
         should.not.exist(err);
         operations.length.should.equal(81);
         operations[0].type.should.equal('del');
-        operations[0].key.toString('hex').should.equal('3202a61d2066d19e9e2fd348a8320b7ebd4dd3ca2b00000543abfdbefe0d064729d85556bd3ab13c3a889b685d042499c02b4aa2064fb1e1692300000000');
+        operations[0].key.toString('hex').should.equal('0202a61d2066d19e9e2fd348a8320b7ebd4dd3ca2b00000543abfdbefe0d064729d85556bd3ab13c3a889b685d042499c02b4aa2064fb1e1692300000000');
         operations[0].value.toString('hex').should.equal('41e2a49ec1c0000076a91402a61d2066d19e9e2fd348a8320b7ebd4dd3ca2b88ac');
         operations[3].type.should.equal('del');
-        operations[3].key.toString('hex').should.equal('33fdbd324b28ea69e49c998816407dc055fb81d06e00000543ab3d7d5d98df753ef2a4f82438513c509e3b11f3e738e94a7234967b03a03123a900000020');
+        operations[3].key.toString('hex').should.equal('03fdbd324b28ea69e49c998816407dc055fb81d06e00000543ab3d7d5d98df753ef2a4f82438513c509e3b11f3e738e94a7234967b03a03123a900000020');
         operations[3].value.toString('hex').should.equal('5780f3ee54889a0717152a01abee9a32cec1b0cdf8d5537a08c7bd9eeb6bfbca00000000');
         operations[64].type.should.equal('del');
-        operations[64].key.toString('hex').should.equal('329780ccd5356e2acc0ee439ee04e0fe69426c752800000543abe66f3b989c790178de2fc1a5329f94c0d8905d0d3df4e7ecf0115e7f90a6283d00000001');
+        operations[64].key.toString('hex').should.equal('029780ccd5356e2acc0ee439ee04e0fe69426c752800000543abe66f3b989c790178de2fc1a5329f94c0d8905d0d3df4e7ecf0115e7f90a6283d00000001');
         operations[64].value.toString('hex').should.equal('4147a6b00000000076a9149780ccd5356e2acc0ee439ee04e0fe69426c752888ac');
         done();
       });
@@ -563,7 +563,7 @@ describe('Address Service', function() {
       });
       createReadStreamCallCount.should.equal(1);
       var data = {
-        key: new Buffer('32038a213afdfc551fc658e9a2a58a86e98d69b687000000000f125dd0e50fc732d67c37b6c56be7f9dc00b6859cebf982ee2cc83ed2d604bf8700000001', 'hex'),
+        key: new Buffer('02038a213afdfc551fc658e9a2a58a86e98d69b687000000000f125dd0e50fc732d67c37b6c56be7f9dc00b6859cebf982ee2cc83ed2d604bf8700000001', 'hex'),
         value: new Buffer('41f0de058a80000076a914038a213afdfc551fc658e9a2a58a86e98d69b68788ac', 'hex')
       };
       testStream.emit('data', data);
@@ -611,12 +611,12 @@ describe('Address Service', function() {
       });
 
       var data1 = {
-        key: new Buffer('32038a213afdfc551fc658e9a2a58a86e98d69b68700000543a8125dd0e50fc732d67c37b6c56be7f9dc00b6859cebf982ee2cc83ed2d604bf8700000001', 'hex'),
+        key: new Buffer('02038a213afdfc551fc658e9a2a58a86e98d69b68700000543a8125dd0e50fc732d67c37b6c56be7f9dc00b6859cebf982ee2cc83ed2d604bf8700000001', 'hex'),
         value: new Buffer('41f0de058a80000076a914038a213afdfc551fc658e9a2a58a86e98d69b68788ac', 'hex')
       };
 
       var data2 = {
-        key: new Buffer('32038a213afdfc551fc658e9a2a58a86e98d69b68700000543ac3b6bc2939d1a70ce04bc4f619ee32608fbff5e565c1f9b02e4eaa97959c59ae700000002', 'hex'),
+        key: new Buffer('02038a213afdfc551fc658e9a2a58a86e98d69b68700000543ac3b6bc2939d1a70ce04bc4f619ee32608fbff5e565c1f9b02e4eaa97959c59ae700000002', 'hex'),
         value: new Buffer('40c388000000000076a914038a213afdfc551fc658e9a2a58a86e98d69b68788ac', 'hex')
       };
 

test/services/db.unit.js

@@ -369,6 +369,76 @@ describe('DB Service', function() {
     });
   });
 
+  describe('#getBlockHashesByTimestamp', function() {
+    it('should get the correct block hashes', function(done) {
+      var db = new DB(baseConfig);
+      var readStream = new EventEmitter();
+      db.store = {
+        createReadStream: sinon.stub().returns(readStream)
+      };
+
+      var block1 = {
+        hash: '00000000050a6d07f583beba2d803296eb1e9d4980c4a20f206c584e89a4f02b',
+        timestamp: 1441911909
+      };
+
+      var block2 = {
+        hash: '000000000383752a55a0b2891ce018fd0fdc0b6352502772b034ec282b4a1bf6',
+        timestamp: 1441913112
+      };
+
+      db.getBlockHashesByTimestamp(1441914000, 1441911000, function(err, hashes) {
+        should.not.exist(err);
+        hashes.should.deep.equal([block2.hash, block1.hash]);
+        done();
+      });
+
+      readStream.emit('data', {
+        key: db._encodeBlockIndexKey(block2.timestamp),
+        value: db._encodeBlockIndexValue(block2.hash)
+      });
+
+      readStream.emit('data', {
+        key: db._encodeBlockIndexKey(block1.timestamp),
+        value: db._encodeBlockIndexValue(block1.hash)
+      });
+
+      readStream.emit('close');
+    });
+
+    it('should give an error if the stream has an error', function(done) {
+      var db = new DB(baseConfig);
+      var readStream = new EventEmitter();
+      db.store = {
+        createReadStream: sinon.stub().returns(readStream)
+      };
+
+      db.getBlockHashesByTimestamp(1441911000, 1441914000, function(err, hashes) {
+        should.exist(err);
+        err.message.should.equal('error');
+        done();
+      });
+
+      readStream.emit('error', new Error('error'));
+
+      readStream.emit('close');
+    });
+
+    it('should give an error if the timestamp is out of range', function(done) {
+      var db = new DB(baseConfig);
+      var readStream = new EventEmitter();
+      db.store = {
+        createReadStream: sinon.stub().returns(readStream)
+      };
+
+      db.getBlockHashesByTimestamp(-1, -5, function(err, hashes) {
+        should.exist(err);
+        err.message.should.equal('Invalid Argument: timestamp out of bounds');
+        done();
+      });
+    });
+  });
+
   describe('#getPrevHash', function() {
     it('should return prevHash from bitcoind', function(done) {
       var db = new DB(baseConfig);
@@ -650,10 +720,22 @@ describe('DB Service', function() {
       batch: sinon.stub().callsArg(1)
     };
 
+    var block = {
+      hash: '00000000000000000d0aaf93e464ddeb503655a0750f8b9c6eed0bdf0ccfc863',
+      header: {
+        timestamp: 1441906365
+      }
+    };
+
     it('should call blockHandler in all services and perform operations', function(done) {
-      db.runAllBlockHandlers('block', true, function(err) {
+      db.runAllBlockHandlers(block, true, function(err) {
         should.not.exist(err);
-        db.store.batch.args[0][0].should.deep.equal(['op1', 'op2', 'op3', 'op4', 'op5']);
+        var blockOp = {
+          type: 'put',
+          key: db._encodeBlockIndexKey(1441906365),
+          value: db._encodeBlockIndexValue('00000000000000000d0aaf93e464ddeb503655a0750f8b9c6eed0bdf0ccfc863')
+        };
+        db.store.batch.args[0][0].should.deep.equal([blockOp, 'op1', 'op2', 'op3', 'op4', 'op5']);
         done();
       });
     });
@@ -663,7 +745,7 @@ describe('DB Service', function() {
       Service3.prototype.blockHandler = sinon.stub().callsArgWith(2, new Error('error'));
       db.node.services.service3 = new Service3();
 
-      db.runAllBlockHandlers('block', true, function(err) {
+      db.runAllBlockHandlers(block, true, function(err) {
         should.exist(err);
         done();
       });
@@ -675,7 +757,7 @@ describe('DB Service', function() {
         service3: new Service3()
       };
 
-      db.runAllBlockHandlers('block', true, function(err) {
+      db.runAllBlockHandlers(block, true, function(err) {
         should.not.exist(err);
         done();
       });
@@ -688,7 +770,7 @@ describe('DB Service', function() {
       };
 
       (function() {
-        db.runAllBlockHandlers('block', true, function(err) {
+        db.runAllBlockHandlers(block, true, function(err) {
           should.not.exist(err);
         });
       }).should.throw('bitcore.ErrorInvalidArgument');
@@ -701,7 +783,7 @@ describe('DB Service', function() {
       db.node = {};
       db.node.services = {};
       var methods = db.getAPIMethods();
-      methods.length.should.equal(5);
+      methods.length.should.equal(6);
     });
   });