fanatid
commented
4 years ago It's happened because you create buffer not from aligned hex:
Buffer.from('c3e86eb', 'hex')
<Buffer c3 e8 6e>b is missed in buffer.
You can solve it with String#padStart
const hex = 'c3e86eb'
Buffer.from(hex.padStart(hex.length + hex.length % 2, '0'), 'hex')
<Buffer 0c 3e 86 eb>
Hello, hashcode is getting generated from murmurhash with uuid v4 when i trying to encode and decode sometimes it is working correctly and sometime working incorrectly
please follow the below code and correct and incorrect results
const bs58 = require('bs58') //"bs58": "^4.0.1", const murmur = require('murmurhash') //"murmurhash": "0.0.2",
const uuidv4= require('uuid/v4') //"uuid": "^3.3.3"
const hashcodeBefore = murmur(uuidv4()) console.log(
hash code =>${hashcodeBefore}) const hexValueBeforeEncoding = hashcodeBefore.toString(16) console.log(hex value => ${hexValueBeforeEncoding})// encode const encode = bs58.encode(Buffer.from(hexValueBeforeEncoding,'hex')) console.log(
encode values is => ${encode})//decode
const hexValueAfterDecoding = bs58.decode(encode).toString('hex'); console.log(
decode to hex value => ${hexValueAfterDecoding})const hashcodeAfter = parseInt(hexValueAfterDecoding,16) console.log(
hash code => ${hashcodeAfter})correct results 1) hash code is 2882525932 hex value => abcfdaec encode values is => 5PihXy decode to hex value => abcfdaec hash code => 2882525932 2) hash code =>842513527 hex value => 3237bc77 encode values is => 2HT6vJ decode to hex value => 3237bc77 hash code => 842513527
3) hash code =>4034442918 hex value => f078b6a6 encode values is => 79WaKf decode to hex value => f078b6a6 hash code => 4034442918
4) hash code =>3752366994 hex value => dfa89392 encode values is => 6iaryf decode to hex value => dfa89392 hash code => 3752366994
incorrect result 1) hash code =>205424363 hex value => c3e86eb encode values is => 28obT decode to hex value => c3e86e ( character b is missing here) hash code => 12839022 (incorrect hashcode value generated)
2) hash code =>70739630 hex value => 43766ae encode values is => PfH3 decode to hex value => 43766a (character e is missing here) hash code => 4421226 ( incorrect hascode value generated)
3) hash code =>66211204 hex value => 3f24d84 encode values is => ND9H decode to hex value => 3f24d8 (character 4 is missing here) hash code => 4138200 ( incorrect hascode value generated)
4) hash code =>189365373 hex value => b497c7d encode values is => 23fEW decode to hex value => b497c7 (character d is missing here) hash code => 11835335 ( incorrect hascode value generated)
is there any thing i am doing wrong in this code please check and let me know and thanks in advance