diff --git a/lib/http/rpc.js b/lib/http/rpc.js
index cecf97da..9806cf5d 100644
--- a/lib/http/rpc.js
+++ b/lib/http/rpc.js
@@ -1027,7 +1027,7 @@ RPC.prototype._submitWork = async function _submitWork(data) {
   if (data.length !== 128)
     throw new RPCError(errs.INVALID_PARAMETER, 'Invalid work size.');
 
-  header = Headers.fromAbbr(data);
+  header = Headers.fromHead(data);
 
   data = data.slice(0, 80);
   data = swap32(data);
diff --git a/lib/net/bip152.js b/lib/net/bip152.js
index 35036baf..94a176f9 100644
--- a/lib/net/bip152.js
+++ b/lib/net/bip152.js
@@ -257,7 +257,7 @@ CompactBlock.prototype.getSize = function getSize(witness) {
  */
 
 CompactBlock.prototype.writeRaw = function writeRaw(bw, witness) {
-  this.writeAbbr(bw);
+  this.writeHead(bw);
 
   bw.writeBytes(this.keyNonce);
 
@@ -397,7 +397,7 @@ CompactBlock.prototype.hasIndex = function hasIndex(index) {
  */
 
 CompactBlock.prototype.getKey = function getKey() {
-  let data = Buffer.concat([this.abbr(), this.keyNonce]);
+  let data = Buffer.concat([this.toHead(), this.keyNonce]);
   let hash = digest.sha256(data);
   return hash.slice(0, 16);
 };
diff --git a/lib/primitives/abstractblock.js b/lib/primitives/abstractblock.js
index c7a0c1eb..dd4f97b9 100644
--- a/lib/primitives/abstractblock.js
+++ b/lib/primitives/abstractblock.js
@@ -155,7 +155,7 @@ AbstractBlock.prototype.hash = function _hash(enc) {
   let hash = this._hash;
 
   if (!hash) {
-    hash = digest.hash256(this.abbr());
+    hash = digest.hash256(this.toHead());
     if (!this.mutable)
       this._hash = hash;
   }
@@ -178,8 +178,8 @@ AbstractBlock.prototype.hash = function _hash(enc) {
  * @returns {Buffer}
  */
 
-AbstractBlock.prototype.abbr = function abbr() {
-  return this.writeAbbr(new StaticWriter(80)).render();
+AbstractBlock.prototype.toHead = function toHead() {
+  return this.writeHead(new StaticWriter(80)).render();
 };
 
 /**
@@ -187,7 +187,7 @@ AbstractBlock.prototype.abbr = function abbr() {
  * @param {BufferWriter} bw
  */
 
-AbstractBlock.prototype.writeAbbr = function writeAbbr(bw) {
+AbstractBlock.prototype.writeHead = function writeHead(bw) {
   bw.writeU32(this.version);
   bw.writeHash(this.prevBlock);
   bw.writeHash(this.merkleRoot);
@@ -202,7 +202,7 @@ AbstractBlock.prototype.writeAbbr = function writeAbbr(bw) {
  * @param {BufferReader} br
  */
 
-AbstractBlock.prototype.parseAbbr = function parseAbbr(br) {
+AbstractBlock.prototype.parseHead = function parseHead(br) {
   this.version = br.readU32();
   this.prevBlock = br.readHash('hex');
   this.merkleRoot = br.readHash('hex');
diff --git a/lib/primitives/block.js b/lib/primitives/block.js
index 5eb72153..08ec67c7 100644
--- a/lib/primitives/block.js
+++ b/lib/primitives/block.js
@@ -644,7 +644,7 @@ Block.prototype.fromReader = function fromReader(br) {
 
   br.start();
 
-  this.parseAbbr(br);
+  this.parseHead(br);
 
   count = br.readVarint();
 
@@ -718,14 +718,12 @@ Block.prototype.toMerkle = function toMerkle(filter) {
  */
 
 Block.prototype.writeNormal = function writeNormal(bw) {
-  this.writeAbbr(bw);
+  this.writeHead(bw);
 
   bw.writeVarint(this.txs.length);
 
-  for (let i = 0; i < this.txs.length; i++) {
-    let tx = this.txs[i];
+  for (let tx of this.txs)
     tx.toNormalWriter(bw);
-  }
 
   return bw;
 };
@@ -739,14 +737,12 @@ Block.prototype.writeNormal = function writeNormal(bw) {
  */
 
 Block.prototype.writeWitness = function writeWitness(bw) {
-  this.writeAbbr(bw);
+  this.writeHead(bw);
 
   bw.writeVarint(this.txs.length);
 
-  for (let i = 0; i < this.txs.length; i++) {
-    let tx = this.txs[i];
+  for (let tx of this.txs)
     tx.toWriter(bw);
-  }
 
   return bw;
 };
@@ -802,10 +798,8 @@ Block.prototype.getNormalSizes = function getNormalSizes() {
   size += 80;
   size += encoding.sizeVarint(this.txs.length);
 
-  for (let i = 0; i < this.txs.length; i++) {
-    let tx = this.txs[i];
+  for (let tx of this.txs)
     size += tx.getBaseSize();
-  }
 
   return new RawBlock(size, 0);
 };
@@ -822,8 +816,7 @@ Block.prototype.getWitnessSizes = function getWitnessSizes() {
   size += 80;
   size += encoding.sizeVarint(this.txs.length);
 
-  for (let i = 0; i < this.txs.length; i++) {
-    let tx = this.txs[i];
+  for (let tx of this.txs) {
     let sizes = tx.getSizes();
     size += sizes.total;
     witness += sizes.witness;
diff --git a/lib/primitives/headers.js b/lib/primitives/headers.js
index 7599ad91..96cd92c1 100644
--- a/lib/primitives/headers.js
+++ b/lib/primitives/headers.js
@@ -58,7 +58,7 @@ Headers.prototype.getSize = function getSize() {
  */
 
 Headers.prototype.toWriter = function toWriter(bw) {
-  this.writeAbbr(bw);
+  this.writeHead(bw);
   bw.writeVarint(0);
   return bw;
 };
@@ -80,7 +80,7 @@ Headers.prototype.toRaw = function toRaw() {
  */
 
 Headers.prototype.fromReader = function fromReader(br) {
-  this.parseAbbr(br);
+  this.parseHead(br);
   br.readVarint();
   return this;
 };
@@ -118,34 +118,15 @@ Headers.fromRaw = function fromRaw(data, enc) {
   return new Headers().fromRaw(data);
 };
 
-/**
- * Inject properties from buffer reader.
- * @private
- * @param {BufferReader} br
- */
-
-Headers.prototype.fromAbbrReader = function fromAbbrReader(br) {
-  return this.parseAbbr(br);
-};
-
 /**
  * Inject properties from serialized data.
+ * TODO: MOVE.
  * @private
  * @param {Buffer} data
  */
 
-Headers.prototype.fromAbbr = function fromAbbr(data) {
-  return this.fromAbbrReader(new BufferReader(data));
-};
-
-/**
- * Instantiate headers from buffer reader.
- * @param {BufferReader} br
- * @returns {Headers}
- */
-
-Headers.fromAbbrReader = function fromAbbrReader(br) {
-  return new Headers().fromAbbrReader(br);
+Headers.prototype.fromHead = function fromHead(data) {
+  return this.parseHead(new BufferReader(data));
 };
 
 /**
@@ -155,10 +136,10 @@ Headers.fromAbbrReader = function fromAbbrReader(br) {
  * @returns {Headers}
  */
 
-Headers.fromAbbr = function fromAbbr(data, enc) {
+Headers.fromHead = function fromHead(data, enc) {
   if (typeof data === 'string')
     data = Buffer.from(data, enc);
-  return new Headers().fromAbbr(data);
+  return new Headers().fromHead(data);
 };
 
 /**
@@ -291,7 +272,7 @@ Headers.prototype.format = function format(view, height) {
 Headers.isHeaders = function isHeaders(obj) {
   return obj
     && !obj.txs
-    && typeof obj.abbr === 'function'
+    && typeof obj.toHead === 'function'
     && typeof obj.toBlock !== 'function';
 };
 
diff --git a/lib/primitives/memblock.js b/lib/primitives/memblock.js
index 5209b30b..475237c5 100644
--- a/lib/primitives/memblock.js
+++ b/lib/primitives/memblock.js
@@ -59,7 +59,7 @@ MemBlock.prototype.memory = true;
  * @returns {Buffer}
  */
 
-MemBlock.prototype.abbr = function abbr() {
+MemBlock.prototype.toHead = function toHead() {
   return this._raw.slice(0, 80);
 };
 
@@ -144,7 +144,7 @@ MemBlock.prototype.parseCoinbaseHeight = function parseCoinbaseHeight() {
 MemBlock.prototype.fromRaw = function fromRaw(data) {
   let br = new BufferReader(data, true);
 
-  this.parseAbbr(br);
+  this.parseHead(br);
 
   this._raw = br.data;
 
diff --git a/lib/primitives/merkleblock.js b/lib/primitives/merkleblock.js
index 5ac28db6..42f2d03d 100644
--- a/lib/primitives/merkleblock.js
+++ b/lib/primitives/merkleblock.js
@@ -346,7 +346,7 @@ MerkleBlock.prototype.getSize = function getSize() {
  */
 
 MerkleBlock.prototype.toWriter = function toWriter(bw) {
-  this.writeAbbr(bw);
+  this.writeHead(bw);
 
   bw.writeU32(this.totalTX);
 
@@ -380,7 +380,7 @@ MerkleBlock.prototype.toRaw = function toRaw() {
 MerkleBlock.prototype.fromReader = function fromReader(br) {
   let count;
 
-  this.parseAbbr(br);
+  this.parseHead(br);
 
   this.totalTX = br.readU32();
 
diff --git a/lib/wallet/client.js b/lib/wallet/client.js
index f3f0ef54..67ab31a1 100644
--- a/lib/wallet/client.js
+++ b/lib/wallet/client.js
@@ -314,7 +314,7 @@ function parseEntry(data, enc) {
   if (typeof data === 'string')
     data = Buffer.from(data, 'hex');
 
-  block = Headers.fromAbbr(data);
+  block = Headers.fromHead(data);
 
   br = new BufferReader(data);
   br.seek(80);