Package Exports
- ethashjs
This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (ethashjs) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.
Readme
SYNOPSIS
Implements Ethash.
INSTALL
npm install ethashjs
USAGE
const Ethash = require('ethashjs')
const Block = require('ethereumjs-block')
const levelup = require('levelup')
const memdown = require('memdown')
var cacheDB = levelup('', {
db: memdown
})
var ethash = new Ethash(cacheDB)
var validblockRlp =
'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'
var validblock = new Block(Buffer.from(validblockRlp, 'hex'))
ethash.verifyPOW(validblock, function (result) {
console.log(result)
})
BROWSER
Yep, you can browserify it.
API
new Ethash([cacheDB])
ethash.verifyPOW(block, cb)
ethash.mkcache(cacheSize, seed)
ethash.run(val, nonce, fullsize)
new Ethash([cacheDB])
Creates a new instance of Ethash
.
Parameters
cacheDB
- an instance of a levelup db which is used to store the cache(s)
ethash.verifyPOW(block, cb)
Verifies the POW on a block and its uncles
Parameters
block
- the block to verifycb
- the callback which is given aBoolean
determining the validaty of the block
ethash.mkcache(cacheSize, seed)
Creates a cache. NOTE: this is automatically done for in - ethash.verifyPOW(block, cb)
so you do not need to use this function if you are just validating blocks
Parameters
cachSize
- the size of the cachseed
- the seed as aBuffer
ethash.run(val, nonce, fullsize)
Runs ethash on a give val/nonce pair. NOTE: you need to run ethash.mkcache(cacheSize, seed)
first before using this function.
Parameters
val
- value to run ethash on e.g. the header hashnonce
- the nonce used for this hash attemptfullsize
- the fullsize of the cache.
Returns
An Object
containing:
hash
- the hash of the valuemix
- the mis result
TESTS
npm test