Removes redundant convert functions

src/convert.js

@@ -24,15 +24,6 @@ function hexToBytes(hex) {
   })
 }
 
-/**
- * Create a byte array representing a number with the given length
- */
-function numToBytes(num, bytes) {
-  if (bytes === undefined) bytes = 8
-  if (bytes === 0) return []
-  return [num % 256].concat(numToBytes(Math.floor(num / 256), bytes - 1))
-}
-
 /**
  * Convert a byte array to the number that it represents
  */
@@ -41,42 +32,6 @@ function bytesToNum(bytes) {
   return bytes[0] + 256 * bytesToNum(bytes.slice(1))
 }
 
-/**
- * Turn an integer into a "var_int".
- *
- * "var_int" is a variable length integer used by Bitcoin's binary format.
- *
- * Returns a byte array.
- */
-function numToVarInt(num) {
-  if (num < 253) return [num]
-  if (num < 65536) return [253].concat(numToBytes(num, 2))
-  if (num < 4294967296) return [254].concat(numToBytes(num, 4))
-  return [255].concat(numToBytes(num, 8))
-}
-
-/**
- * Turn an VarInt into an integer
- *
- * "var_int" is a variable length integer used by Bitcoin's binary format.
- *
- * Returns { bytes: bytesUsed, number: theNumber }
- */
-function varIntToNum(bytes) {
-  var prefix = bytes[0]
-
-  var viBytes =
-      prefix < 253   ? bytes.slice(0, 1)
-    : prefix === 253 ? bytes.slice(1, 3)
-    : prefix === 254 ? bytes.slice(1, 5)
-    : bytes.slice(1, 9)
-
-  return {
-    bytes: prefix < 253 ? viBytes : bytes.slice(0, viBytes.length + 1),
-    number: bytesToNum(viBytes)
-  }
-}
-
 function bytesToWords(bytes) {
   assert(Array.isArray(bytes) || Buffer.isBuffer(bytes), 'Input must be a byte array')
   var words = []
@@ -110,10 +65,7 @@ module.exports = {
   lpad: lpad,
   bytesToHex: bytesToHex,
   hexToBytes: hexToBytes,
-  numToBytes: numToBytes,
   bytesToNum: bytesToNum,
-  numToVarInt: numToVarInt,
-  varIntToNum: varIntToNum,
   bytesToWords: bytesToWords,
   wordsToBytes: wordsToBytes,
   bytesToWordArray: bytesToWordArray,