diff --git a/.eslintrc.json b/.eslintrc.json
index e648de87..921a9014 100644
--- a/.eslintrc.json
+++ b/.eslintrc.json
@@ -24,7 +24,7 @@
     "eqeqeq": ["error", "always", {
       "null": "ignore"
     }],
-    "func-name-matching": "off",
+    "func-name-matching": "error",
     "indent": ["error", 2, {
       "SwitchCase": 1,
       "CallExpression": {
diff --git a/lib/crypto/aead.js b/lib/crypto/aead.js
index 84ee6b57..13a3a583 100644
--- a/lib/crypto/aead.js
+++ b/lib/crypto/aead.js
@@ -63,10 +63,10 @@ AEAD.prototype.init = function init(key, iv) {
  * @param {Buffer} aad
  */
 
-AEAD.prototype.aad = function _aad(aad) {
+AEAD.prototype.aad = function aad(data) {
   assert(this.cipherLen === 0, 'Cannot update aad.');
-  this.poly1305.update(aad);
-  this.aadLen += aad.length;
+  this.poly1305.update(data);
+  this.aadLen += data.length;
 };
 
 /**
diff --git a/lib/crypto/aes.js b/lib/crypto/aes.js
index ac874875..15618fcd 100644
--- a/lib/crypto/aes.js
+++ b/lib/crypto/aes.js
@@ -22,8 +22,8 @@ const native = require('../native').binding;
  */
 
 exports.encipher = function encipher(data, key, iv) {
-  const cipher = crypto.createCipheriv('aes-256-cbc', key, iv);
-  return Buffer.concat([cipher.update(data), cipher.final()]);
+  const ctx = crypto.createCipheriv('aes-256-cbc', key, iv);
+  return Buffer.concat([ctx.update(data), ctx.final()]);
 };
 
 /**
@@ -34,10 +34,10 @@ exports.encipher = function encipher(data, key, iv) {
  * @returns {Buffer}
  */
 
-exports.decipher = function _decipher(data, key, iv) {
-  const decipher = crypto.createDecipheriv('aes-256-cbc', key, iv);
+exports.decipher = function decipher(data, key, iv) {
+  const ctx = crypto.createDecipheriv('aes-256-cbc', key, iv);
   try {
-    return Buffer.concat([decipher.update(data), decipher.final()]);
+    return Buffer.concat([ctx.update(data), ctx.final()]);
   } catch (e) {
     throw new Error('Bad key for decryption.');
   }
diff --git a/lib/crypto/digest-browser.js b/lib/crypto/digest-browser.js
index 81d9c2f0..4f7f4557 100644
--- a/lib/crypto/digest-browser.js
+++ b/lib/crypto/digest-browser.js
@@ -13,7 +13,7 @@
 
 const assert = require('assert');
 const hashjs = require('hash.js');
-const sha256 = require('./sha256');
+const SHA256 = require('./sha256');
 const POOL64 = Buffer.allocUnsafe(64);
 
 /**
@@ -23,15 +23,15 @@ const POOL64 = Buffer.allocUnsafe(64);
  * @returns {Buffer}
  */
 
-exports.hash = function _hash(alg, data) {
+exports.hash = function hash(alg, data) {
   if (alg === 'sha256')
-    return sha256.digest(data);
+    return SHA256.digest(data);
 
-  const hash = hashjs[alg];
+  const algo = hashjs[alg];
 
-  assert(hash != null, 'Unknown algorithm.');
+  assert(algo != null, 'Unknown algorithm.');
 
-  return Buffer.from(hash().update(data).digest());
+  return Buffer.from(algo().update(data).digest());
 };
 
 /**
@@ -60,8 +60,8 @@ exports.sha1 = function sha1(data) {
  * @returns {Buffer}
  */
 
-exports.sha256 = function _sha256(data) {
-  return sha256.digest(data);
+exports.sha256 = function sha256(data) {
+  return SHA256.digest(data);
 };
 
 /**
@@ -71,7 +71,7 @@ exports.sha256 = function _sha256(data) {
  */
 
 exports.hash160 = function hash160(data) {
-  return exports.hash('ripemd160', sha256.digest(data));
+  return exports.hash('ripemd160', SHA256.digest(data));
 };
 
 /**
@@ -81,7 +81,7 @@ exports.hash160 = function hash160(data) {
  */
 
 exports.hash256 = function hash256(data) {
-  return sha256.hash256(data);
+  return SHA256.hash256(data);
 };
 
 /**
@@ -111,12 +111,12 @@ exports.root256 = function root256(left, right) {
  * @returns {Buffer} HMAC
  */
 
-exports.hmac = function _hmac(alg, data, key) {
-  const hash = hashjs[alg];
+exports.hmac = function hmac(alg, data, key) {
+  const algo = hashjs[alg];
 
-  assert(hash != null, 'Unknown algorithm.');
+  assert(algo != null, 'Unknown algorithm.');
 
-  const hmac = hashjs.hmac(hash, key);
+  const ctx = hashjs.hmac(algo, key);
 
-  return Buffer.from(hmac.update(data).digest());
+  return Buffer.from(ctx.update(data).digest());
 };
diff --git a/lib/crypto/digest.js b/lib/crypto/digest.js
index c184ed88..d65d72a5 100644
--- a/lib/crypto/digest.js
+++ b/lib/crypto/digest.js
@@ -103,9 +103,9 @@ exports.root256 = function root256(left, right) {
  * @returns {Buffer} HMAC
  */
 
-exports.hmac = function _hmac(alg, data, key) {
-  const hmac = crypto.createHmac(alg, key);
-  return hmac.update(data).digest();
+exports.hmac = function hmac(alg, data, key) {
+  const ctx = crypto.createHmac(alg, key);
+  return ctx.update(data).digest();
 };
 
 if (native) {
diff --git a/lib/crypto/schnorr.js b/lib/crypto/schnorr.js
index f10657d8..dc667048 100644
--- a/lib/crypto/schnorr.js
+++ b/lib/crypto/schnorr.js
@@ -28,7 +28,7 @@ const schnorr = exports;
  * @returns {Buffer}
  */
 
-schnorr.hash = function _hash(msg, r) {
+schnorr.hash = function hash(msg, r) {
   const R = r.toBuffer('be', 32);
   const B = POOL64;
 
diff --git a/lib/db/lowlevelup.js b/lib/db/lowlevelup.js
index 806d4c20..8e6e3cec 100644
--- a/lib/db/lowlevelup.js
+++ b/lib/db/lowlevelup.js
@@ -480,8 +480,8 @@ LowlevelUp.prototype.range = async function range(options) {
  * @returns {Promise} - Returns Array.
  */
 
-LowlevelUp.prototype.keys = async function _keys(options) {
-  const keys = [];
+LowlevelUp.prototype.keys = async function keys(options) {
+  const items = [];
   const parse = options.parse;
 
   const iter = this.iterator({
@@ -509,10 +509,10 @@ LowlevelUp.prototype.keys = async function _keys(options) {
     }
 
     if (key)
-      keys.push(key);
+      items.push(key);
   }
 
-  return keys;
+  return items;
 };
 
 /**
@@ -522,8 +522,8 @@ LowlevelUp.prototype.keys = async function _keys(options) {
  * @returns {Promise} - Returns Array.
  */
 
-LowlevelUp.prototype.values = async function _values(options) {
-  const values = [];
+LowlevelUp.prototype.values = async function values(options) {
+  const items = [];
   const parse = options.parse;
 
   const iter = this.iterator({
@@ -551,10 +551,10 @@ LowlevelUp.prototype.values = async function _values(options) {
     }
 
     if (value)
-      values.push(value);
+      items.push(value);
   }
 
-  return values;
+  return items;
 };
 
 /**
diff --git a/lib/db/memdb.js b/lib/db/memdb.js
index 8c277eac..1258af12 100644
--- a/lib/db/memdb.js
+++ b/lib/db/memdb.js
@@ -216,21 +216,21 @@ MemDB.prototype.del = function del(key, options, callback) {
  * @param {Function} callback
  */
 
-MemDB.prototype.batch = function _batch(ops, options, callback) {
+MemDB.prototype.batch = function batch(ops, options, callback) {
   if (!callback) {
     callback = options;
     options = null;
   }
 
-  const batch = new Batch(this, options);
+  const b = new Batch(this, options);
 
   if (ops) {
-    batch.ops = ops;
-    batch.write(callback);
+    b.ops = ops;
+    b.write(callback);
     return undefined;
   }
 
-  return batch;
+  return b;
 };
 
 /**
diff --git a/lib/http/base.js b/lib/http/base.js
index 3af24188..b59cb627 100644
--- a/lib/http/base.js
+++ b/lib/http/base.js
@@ -1111,20 +1111,20 @@ Route.prototype.compile = function compile() {
   this.regex = new RegExp('^' + path + '$');
 };
 
-Route.prototype.match = function _match(pathname) {
+Route.prototype.match = function match(pathname) {
   this.compile();
 
   assert(this.regex);
 
-  const match = this.regex.exec(pathname);
+  const matches = this.regex.exec(pathname);
 
-  if (!match)
+  if (!matches)
     return null;
 
   const params = Object.create(null);
 
-  for (let i = 1; i < match.length; i++) {
-    const item = match[i];
+  for (let i = 1; i < matches.length; i++) {
+    const item = matches[i];
     const key = this.map[i - 1];
 
     if (key)
diff --git a/lib/http/request.js b/lib/http/request.js
index 98fc6304..937e442e 100644
--- a/lib/http/request.js
+++ b/lib/http/request.js
@@ -530,20 +530,20 @@ function request(options) {
   options.buffer = true;
 
   return new Promise((resolve, reject) => {
-    const stream = new Request(options);
+    const req = new Request(options);
 
-    stream.on('error', err => reject(err));
-    stream.on('end', () => resolve(stream));
+    req.on('error', err => reject(err));
+    req.on('end', () => resolve(req));
 
-    stream.start();
-    stream.end();
+    req.start();
+    req.end();
   });
 }
 
-request.stream = function _stream(options) {
-  const stream = new Request(options);
-  stream.start();
-  return stream;
+request.stream = function stream(options) {
+  const req = new Request(options);
+  req.start();
+  return req;
 };
 
 /*
diff --git a/lib/http/rpc.js b/lib/http/rpc.js
index a146fb34..2e76a19c 100644
--- a/lib/http/rpc.js
+++ b/lib/http/rpc.js
@@ -185,7 +185,7 @@ RPC.prototype.getInfo = async function getInfo(args, help) {
   };
 };
 
-RPC.prototype.help = async function _help(args, help) {
+RPC.prototype.help = async function help(args, _help) {
   if (args.length === 0)
     return 'Select a command.';
 
diff --git a/lib/mempool/mempool.js b/lib/mempool/mempool.js
index e7ce9b49..683f00b3 100644
--- a/lib/mempool/mempool.js
+++ b/lib/mempool/mempool.js
@@ -1874,7 +1874,7 @@ Mempool.prototype.getSize = function getSize() {
  * @param {Amount} fee
  */
 
-Mempool.prototype.prioritise = function _prioritise(entry, pri, fee) {
+Mempool.prototype.prioritise = function prioritise(entry, pri, fee) {
   if (-pri > entry.priority)
     pri = -entry.priority;
 
@@ -1886,12 +1886,12 @@ Mempool.prototype.prioritise = function _prioritise(entry, pri, fee) {
   if (fee === 0)
     return;
 
-  this.updateAncestors(entry, preprioritise);
+  this.updateAncestors(entry, prePrioritise);
 
   entry.deltaFee += fee;
   entry.descFee += fee;
 
-  this.updateAncestors(entry, prioritise);
+  this.updateAncestors(entry, postPrioritise);
 };
 
 /**
@@ -2514,11 +2514,11 @@ function removeFee(parent, child) {
   parent.descSize -= child.descSize;
 }
 
-function preprioritise(parent, child) {
+function prePrioritise(parent, child) {
   parent.descFee -= child.deltaFee;
 }
 
-function prioritise(parent, child) {
+function postPrioritise(parent, child) {
   parent.descFee += child.deltaFee;
 }
 
diff --git a/lib/net/bip151.js b/lib/net/bip151.js
index cdfa2020..d822aafb 100644
--- a/lib/net/bip151.js
+++ b/lib/net/bip151.js
@@ -595,7 +595,7 @@ BIP151.prototype.packetSize = function packetSize(cmd, body) {
  * @returns {Buffer} Ciphertext payload
  */
 
-BIP151.prototype.packet = function _packet(cmd, body) {
+BIP151.prototype.packet = function packet(cmd, body) {
   const size = this.packetSize(cmd, body);
   const bw = new StaticWriter(size);
   const payloadSize = size - 20;
@@ -606,17 +606,17 @@ BIP151.prototype.packet = function _packet(cmd, body) {
   bw.writeBytes(body);
   bw.seek(16);
 
-  const packet = bw.render();
-  const payload = packet.slice(4, 4 + payloadSize);
+  const msg = bw.render();
+  const payload = msg.slice(4, 4 + payloadSize);
 
-  this.maybeRekey(packet);
+  this.maybeRekey(msg);
 
-  this.output.encryptSize(packet);
+  this.output.encryptSize(msg);
   this.output.encrypt(payload);
-  this.output.finish().copy(packet, 4 + payloadSize);
+  this.output.finish().copy(msg, 4 + payloadSize);
   this.output.sequence();
 
-  return packet;
+  return msg;
 };
 
 /**
diff --git a/lib/net/framer.js b/lib/net/framer.js
index 1be307de..7a568f72 100644
--- a/lib/net/framer.js
+++ b/lib/net/framer.js
@@ -29,37 +29,38 @@ function Framer(network) {
  * Frame a payload with a header.
  * @param {String} cmd - Packet type.
  * @param {Buffer} payload
+ * @param {Buffer?} checksum - Precomputed checksum.
  * @returns {Buffer} Payload with header prepended.
  */
 
-Framer.prototype.packet = function _packet(cmd, payload, checksum) {
+Framer.prototype.packet = function packet(cmd, payload, checksum) {
   assert(payload, 'No payload.');
   assert(cmd.length < 12);
   assert(payload.length <= 0xffffffff);
 
-  const packet = Buffer.allocUnsafe(24 + payload.length);
+  const msg = Buffer.allocUnsafe(24 + payload.length);
 
   // Magic value
-  packet.writeUInt32LE(this.network.magic, 0, true);
+  msg.writeUInt32LE(this.network.magic, 0, true);
 
   // Command
-  packet.write(cmd, 4, 'ascii');
+  msg.write(cmd, 4, 'ascii');
 
   for (let i = 4 + cmd.length; i < 16; i++)
-    packet[i] = 0;
+    msg[i] = 0;
 
   // Payload length
-  packet.writeUInt32LE(payload.length, 16, true);
+  msg.writeUInt32LE(payload.length, 16, true);
 
   if (!checksum)
     checksum = digest.hash256(payload);
 
   // Checksum
-  checksum.copy(packet, 20, 0, 4);
+  checksum.copy(msg, 20, 0, 4);
 
-  payload.copy(packet, 24);
+  payload.copy(msg, 24);
 
-  return packet;
+  return msg;
 };
 
 /*
diff --git a/lib/net/hostlist.js b/lib/net/hostlist.js
index 243bac48..7cfef73c 100644
--- a/lib/net/hostlist.js
+++ b/lib/net/hostlist.js
@@ -1309,16 +1309,15 @@ HostEntry.prototype.key = function key() {
  * @returns {Number}
  */
 
-HostEntry.prototype.chance = function _chance(now) {
-  const attempts = this.attempts;
-  let chance = 1;
+HostEntry.prototype.chance = function chance(now) {
+  let c = 1;
 
   if (now - this.lastAttempt < 60 * 10)
-    chance *= 0.01;
+    c *= 0.01;
 
-  chance *= Math.pow(0.66, Math.min(attempts, 8));
+  c *= Math.pow(0.66, Math.min(this.attempts, 8));
 
-  return chance;
+  return c;
 };
 
 /**
diff --git a/lib/node/config.js b/lib/node/config.js
index 32244721..4d397733 100644
--- a/lib/node/config.js
+++ b/lib/node/config.js
@@ -7,7 +7,7 @@
 'use strict';
 
 const assert = require('assert');
-const path = require('path');
+const Path = require('path');
 const os = require('os');
 const fs = require('../utils/fs');
 const util = require('../utils/util');
@@ -29,7 +29,7 @@ function Config(module) {
 
   this.module = module;
   this.network = 'main';
-  this.prefix = path.join(HOME, `.${module}`);
+  this.prefix = Path.join(HOME, `.${module}`);
 
   this.options = Object.create(null);
   this.data = Object.create(null);
@@ -601,7 +601,7 @@ Config.prototype.func = function func(key, fallback) {
  * @returns {String|null}
  */
 
-Config.prototype.path = function _path(key, fallback) {
+Config.prototype.path = function path(key, fallback) {
   let value = this.str(key);
 
   if (fallback === undefined)
@@ -612,16 +612,16 @@ Config.prototype.path = function _path(key, fallback) {
 
   switch (value[0]) {
     case '~': // home dir
-      value = path.join(HOME, value.substring(1));
+      value = Path.join(HOME, value.substring(1));
       break;
     case '@': // prefix
-      value = path.join(this.prefix, value.substring(1));
+      value = Path.join(this.prefix, value.substring(1));
       break;
     default: // cwd
       break;
   }
 
-  return path.normalize(value);
+  return Path.normalize(value);
 };
 
 /**
@@ -671,21 +671,21 @@ Config.prototype.getPrefix = function getPrefix() {
 
   if (prefix) {
     if (prefix[0] === '~')
-      prefix = path.join(HOME, prefix.substring(1));
+      prefix = Path.join(HOME, prefix.substring(1));
     return prefix;
   }
 
-  prefix = path.join(HOME, `.${this.module}`);
+  prefix = Path.join(HOME, `.${this.module}`);
 
   const network = this.str('network');
 
   if (network) {
     assert(isAlpha(network), 'Bad network.');
     if (network !== 'main')
-      prefix = path.join(prefix, network);
+      prefix = Path.join(prefix, network);
   }
 
-  return path.normalize(prefix);
+  return Path.normalize(prefix);
 };
 
 /**
@@ -701,7 +701,7 @@ Config.prototype.getFile = function getFile(file) {
   if (name)
     return name;
 
-  return path.join(this.prefix, file);
+  return Path.join(this.prefix, file);
 };
 
 /**
@@ -723,7 +723,7 @@ Config.prototype.ensure = function ensure() {
  */
 
 Config.prototype.location = function location(file) {
-  return path.join(this.prefix, file);
+  return Path.join(this.prefix, file);
 };
 
 /**
diff --git a/lib/node/logger.js b/lib/node/logger.js
index 6f8eb73c..189d5fff 100644
--- a/lib/node/logger.js
+++ b/lib/node/logger.js
@@ -507,15 +507,15 @@ Logger.prototype.log = function log(level, module, args) {
  * @returns {LoggerContext}
  */
 
-Logger.prototype.context = function _context(module) {
-  let context = this.contexts[module];
+Logger.prototype.context = function context(module) {
+  let ctx = this.contexts[module];
 
-  if (!context) {
-    context = new LoggerContext(this, module);
-    this.contexts[module] = context;
+  if (!ctx) {
+    ctx = new LoggerContext(this, module);
+    this.contexts[module] = ctx;
   }
 
-  return context;
+  return ctx;
 };
 
 /**
diff --git a/lib/primitives/abstractblock.js b/lib/primitives/abstractblock.js
index 15216c4b..298c90be 100644
--- a/lib/primitives/abstractblock.js
+++ b/lib/primitives/abstractblock.js
@@ -134,26 +134,26 @@ AbstractBlock.prototype.refresh = function refresh() {
  * @returns {Hash|Buffer} hash
  */
 
-AbstractBlock.prototype.hash = function _hash(enc) {
-  let hash = this._hash;
+AbstractBlock.prototype.hash = function hash(enc) {
+  let h = this._hash;
 
-  if (!hash) {
-    hash = digest.hash256(this.toHead());
+  if (!h) {
+    h = digest.hash256(this.toHead());
     if (!this.mutable)
-      this._hash = hash;
+      this._hash = h;
   }
 
   if (enc === 'hex') {
     let hex = this._hhash;
     if (!hex) {
-      hex = hash.toString('hex');
+      hex = h.toString('hex');
       if (!this.mutable)
         this._hhash = hex;
     }
-    hash = hex;
+    h = hex;
   }
 
-  return hash;
+  return h;
 };
 
 /**
diff --git a/lib/primitives/tx.js b/lib/primitives/tx.js
index aa08db0f..d9de4ba1 100644
--- a/lib/primitives/tx.js
+++ b/lib/primitives/tx.js
@@ -175,26 +175,26 @@ TX.prototype.refresh = function refresh() {
  * @returns {Hash|Buffer} hash
  */
 
-TX.prototype.hash = function _hash(enc) {
-  let hash = this._hash;
+TX.prototype.hash = function hash(enc) {
+  let h = this._hash;
 
-  if (!hash) {
-    hash = digest.hash256(this.toNormal());
+  if (!h) {
+    h = digest.hash256(this.toNormal());
     if (!this.mutable)
-      this._hash = hash;
+      this._hash = h;
   }
 
   if (enc === 'hex') {
     let hex = this._hhash;
     if (!hex) {
-      hex = hash.toString('hex');
+      hex = h.toString('hex');
       if (!this.mutable)
         this._hhash = hex;
     }
-    hash = hex;
+    h = hex;
   }
 
-  return hash;
+  return h;
 };
 
 /**
diff --git a/lib/utils/gcs.js b/lib/utils/gcs.js
index 4b6cc133..c4cde9e8 100644
--- a/lib/utils/gcs.js
+++ b/lib/utils/gcs.js
@@ -9,9 +9,8 @@
 const assert = require('assert');
 const Int64 = require('./int64');
 const digest = require('../crypto/digest');
-const siphash24 = require('../crypto/siphash');
-const SCRATCH = Buffer.allocUnsafe(64);
-const DUMMY = Buffer.allocUnsafe(0);
+const siphash = require('../crypto/siphash');
+const DUMMY = Buffer.alloc(0);
 const EOF = new Int64(-1);
 
 /**
@@ -27,22 +26,18 @@ function GCSFilter() {
   this.data = DUMMY;
 }
 
-GCSFilter.prototype.hash = function _hash(enc) {
-  const hash = digest.hash256(this.data);
-  return enc === 'hex' ? hash.toString('hex') : hash;
+GCSFilter.prototype.hash = function hash(enc) {
+  const h = digest.hash256(this.data);
+  return enc === 'hex' ? h.toString('hex') : h;
 };
 
 GCSFilter.prototype.header = function header(prev) {
-  const data = SCRATCH;
-  const hash = this.hash();
-  hash.copy(data, 0);
-  prev.copy(data, 32);
-  return digest.hash256(data);
+  return digest.root256(this.hash(), prev);
 };
 
 GCSFilter.prototype.match = function match(key, data) {
   const br = new BitReader(this.data);
-  const term = siphash(data, key).imod(this.m);
+  const term = siphash24(data, key).imod(this.m);
   let last = new Int64(0);
 
   while (last.lt(term)) {
@@ -70,7 +65,7 @@ GCSFilter.prototype.matchAny = function matchAny(key, items) {
   const values = [];
 
   for (const item of items) {
-    const hash = siphash(item, key).imod(this.m);
+    const hash = siphash24(item, key).imod(this.m);
     values.push(hash);
   }
 
@@ -177,7 +172,7 @@ GCSFilter.prototype.fromItems = function fromItems(P, key, items) {
 
   for (const item of items) {
     assert(Buffer.isBuffer(item));
-    const hash = siphash(item, key).imod(this.m);
+    const hash = siphash24(item, key).imod(this.m);
     values.push(hash);
   }
 
@@ -515,8 +510,8 @@ function compare(a, b) {
   return a.cmp(b) < 0 ? -1 : 1;
 }
 
-function siphash(data, key) {
-  const [hi, lo] = siphash24(data, key);
+function siphash24(data, key) {
+  const [hi, lo] = siphash(data, key);
   return new Int64().join(hi, lo);
 }
 
diff --git a/lib/utils/lru.js b/lib/utils/lru.js
index b971ae3f..3f4ec104 100644
--- a/lib/utils/lru.js
+++ b/lib/utils/lru.js
@@ -288,8 +288,8 @@ LRU.prototype._removeList = function _removeList(item) {
  * @returns {String[]}
  */
 
-LRU.prototype.keys = function _keys() {
-  const keys = [];
+LRU.prototype.keys = function keys() {
+  const items = [];
 
   for (let item = this.head; item; item = item.next) {
     if (item === this.head)
@@ -298,10 +298,10 @@ LRU.prototype.keys = function _keys() {
       assert(item === this.head);
     if (!item.next)
       assert(item === this.tail);
-    keys.push(item.key);
+    items.push(item.key);
   }
 
-  return keys;
+  return items;
 };
 
 /**
@@ -309,13 +309,13 @@ LRU.prototype.keys = function _keys() {
  * @returns {String[]}
  */
 
-LRU.prototype.values = function _values() {
-  const values = [];
+LRU.prototype.values = function values() {
+  const items = [];
 
   for (let item = this.head; item; item = item.next)
-    values.push(item.value);
+    items.push(item.value);
 
-  return values;
+  return items;
 };
 
 /**
diff --git a/lib/utils/protoreader.js b/lib/utils/protoreader.js
index 28bb9c57..7a6452ec 100644
--- a/lib/utils/protoreader.js
+++ b/lib/utils/protoreader.js
@@ -37,8 +37,8 @@ function ProtoReader(data, zeroCopy) {
 
 Object.setPrototypeOf(ProtoReader.prototype, BufferReader.prototype);
 
-ProtoReader.prototype.readVarint = function _readVarint() {
-  const {size, value} = readVarint(this.data, this.offset);
+ProtoReader.prototype.readVarint = function readVarint() {
+  const {size, value} = _readVarint(this.data, this.offset);
   this.offset += size;
   return value;
 };
@@ -159,7 +159,7 @@ ProtoReader.prototype.readField = function readField(tag, opt) {
  * Encoding
  */
 
-function readVarint(data, off) {
+function _readVarint(data, off) {
   let num = 0;
   let ch = 0x80;
   let size = 0;
diff --git a/lib/utils/protowriter.js b/lib/utils/protowriter.js
index 5950d227..5f1a7abd 100644
--- a/lib/utils/protowriter.js
+++ b/lib/utils/protowriter.js
@@ -41,7 +41,7 @@ function ProtoWriter() {
 
 Object.setPrototypeOf(ProtoWriter.prototype, BufferWriter.prototype);
 
-ProtoWriter.prototype.writeVarint = function _writeVarint(num) {
+ProtoWriter.prototype.writeVarint = function writeVarint(num) {
   const size = sizeVarint(num);
 
   // Avoid an extra allocation until
@@ -83,7 +83,7 @@ ProtoWriter.prototype.writeVarint = function _writeVarint(num) {
     }
     default: {
       const value = Buffer.allocUnsafe(size);
-      writeVarint(value, num, 0);
+      _writeVarint(value, num, 0);
       this.writeBytes(value);
       break;
     }
@@ -123,7 +123,7 @@ ProtoWriter.prototype.writeFieldString = function writeFieldString(tag, data, en
  * Encoding
  */
 
-function writeVarint(data, num, off) {
+function _writeVarint(data, num, off) {
   assert(Number.isSafeInteger(num), 'Number exceeds 2^53-1.');
 
   do {
diff --git a/lib/utils/util.js b/lib/utils/util.js
index bb955f88..bb76ac70 100644
--- a/lib/utils/util.js
+++ b/lib/utils/util.js
@@ -446,31 +446,31 @@ util.random = function random(min, max) {
  * @returns {Buffer}
  */
 
-util.nonce = function _nonce(size) {
-  let n, nonce;
+util.nonce = function nonce(size) {
+  let n, data;
 
   if (!size)
     size = 8;
 
   switch (size) {
     case 8:
-      nonce = Buffer.allocUnsafe(8);
+      data = Buffer.allocUnsafe(8);
       n = util.random(0, 0x100000000);
-      nonce.writeUInt32LE(n, 0, true);
+      data.writeUInt32LE(n, 0, true);
       n = util.random(0, 0x100000000);
-      nonce.writeUInt32LE(n, 4, true);
+      data.writeUInt32LE(n, 4, true);
       break;
     case 4:
-      nonce = Buffer.allocUnsafe(4);
+      data = Buffer.allocUnsafe(4);
       n = util.random(0, 0x100000000);
-      nonce.writeUInt32LE(n, 0, true);
+      data.writeUInt32LE(n, 0, true);
       break;
     default:
       assert(false, 'Bad nonce size.');
       break;
   }
 
-  return nonce;
+  return data;
 };
 
 /**
diff --git a/lib/wallet/masterkey.js b/lib/wallet/masterkey.js
index 5f3bd645..ed780e48 100644
--- a/lib/wallet/masterkey.js
+++ b/lib/wallet/masterkey.js
@@ -169,12 +169,12 @@ MasterKey.fromOptions = function fromOptions(options) {
  * @returns {Promise} - Returns {@link HDPrivateKey}.
  */
 
-MasterKey.prototype.unlock = async function _unlock(passphrase, timeout) {
-  const unlock = await this.locker.lock();
+MasterKey.prototype.unlock = async function unlock(passphrase, timeout) {
+  const _unlock = await this.locker.lock();
   try {
     return await this._unlock(passphrase, timeout);
   } finally {
-    unlock();
+    _unlock();
   }
 };
 
@@ -310,7 +310,7 @@ MasterKey.prototype.decipher = function decipher(data, iv) {
  * @returns {Promise}
  */
 
-MasterKey.prototype.lock = async function _lock() {
+MasterKey.prototype.lock = async function lock() {
   const unlock = await this.locker.lock();
   try {
     return await this._lock();
diff --git a/lib/wallet/rpc.js b/lib/wallet/rpc.js
index 4d13174e..45cfd8b4 100644
--- a/lib/wallet/rpc.js
+++ b/lib/wallet/rpc.js
@@ -110,7 +110,7 @@ RPC.prototype.init = function init() {
   this.add('setloglevel', this.setLogLevel);
 };
 
-RPC.prototype.help = async function _help(args, help) {
+RPC.prototype.help = async function help(args, _help) {
   if (args.length === 0)
     return 'Select a command.';
 
diff --git a/lib/workers/framer.js b/lib/workers/framer.js
index 914b07a3..720375b2 100644
--- a/lib/workers/framer.js
+++ b/lib/workers/framer.js
@@ -20,22 +20,22 @@ function Framer() {
     return new Framer();
 }
 
-Framer.prototype.packet = function _packet(packet) {
-  const size = 10 + packet.getSize();
+Framer.prototype.packet = function packet(payload) {
+  const size = 10 + payload.getSize();
   const bw = new StaticWriter(size);
 
-  bw.writeU32(packet.id);
-  bw.writeU8(packet.cmd);
+  bw.writeU32(payload.id);
+  bw.writeU8(payload.cmd);
   bw.seek(4);
 
-  packet.toWriter(bw);
+  payload.toWriter(bw);
 
   bw.writeU8(0x0a);
 
-  const data = bw.render();
-  data.writeUInt32LE(data.length - 10, 5, true);
+  const msg = bw.render();
+  msg.writeUInt32LE(msg.length - 10, 5, true);
 
-  return data;
+  return msg;
 };
 
 /*
diff --git a/lib/workers/jobs.js b/lib/workers/jobs.js
index 21cbf700..5da2aec4 100644
--- a/lib/workers/jobs.js
+++ b/lib/workers/jobs.js
@@ -7,8 +7,8 @@
 'use strict';
 
 const secp256k1 = require('../crypto/secp256k1');
-const scrypt = require('../crypto/scrypt');
-const mine = require('../mining/mine');
+const {derive} = require('../crypto/scrypt');
+const hashcash = require('../mining/mine');
 const packets = require('./packets');
 
 /**
@@ -169,8 +169,8 @@ jobs.ecSign = function ecSign(msg, key) {
  * @returns {Number}
  */
 
-jobs.mine = function _mine(data, target, min, max) {
-  const nonce = mine(data, target, min, max);
+jobs.mine = function mine(data, target, min, max) {
+  const nonce = hashcash(data, target, min, max);
   return new packets.MineResultPacket(nonce);
 };
 
@@ -186,7 +186,7 @@ jobs.mine = function _mine(data, target, min, max) {
  * @returns {Buffer}
  */
 
-jobs.scrypt = function _scrypt(passwd, salt, N, r, p, len) {
-  const key = scrypt.derive(passwd, salt, N, r, p, len);
+jobs.scrypt = function scrypt(passwd, salt, N, r, p, len) {
+  const key = derive(passwd, salt, N, r, p, len);
   return new packets.ScryptResultPacket(key);
 };