cryptonight-v7-upgrade.md

BBS pool upgrade instruction for supporting Cryptonight v7

Following changes are required, please read carefully

You can change the code manually by following the steps below if you are using non-bbscoin pool source
Or cherry-pick this commit:
https://github.com/bbscoin/bbscoin-pool/commit/3283344596c2231ebfe34708546f9deb487001c6

Switch algorithm based on the block version

find following line in lib/pool.js

convertedBlob = cnUtil.convert_blob(shareBuffer);

Add following lines after it

const majorVersion = convertedBlob[0];
hash = cryptoNight(convertedBlob, majorVersion >= 3 ? 1 : 0);

Switch multi-hashing and cryptonote-util to bbscoin's own fork

replace following statements in lib/pool.js and lib/utils.js

// Replace 
var multiHashing = require('multi-hashing');
// with 
var multiHashing = require('multi-hashing-bbscoin');

// Replace
var cnUtil = require('cryptonote-util');
// with 
var cnUtil = require('cryptonote-util-bbscoin');

Update package.json

// Replace the line with cryptonote-util with 
"cryptonote-util-bbscoin": "^1.0.3",

// Replace the line with multi-hashing with 
"multi-hashing-bbscoin": "^1.0.0",

Run NPM install to install the new dependencies

cryptonote-util-bbscoin and multi-hashing-bbscoin only work with node v9.5.0+
Please update your node.js version before running npm install.

npm install

Restart the node processes