lhartikk

PS1="\[\033[36m\]\u\[\033[m\]@\[\033[32m\] \[\033[33;1m\]\w\[\033[0;31m\] (\$(git branch 2>/dev/null | grep '^*' | colrm 1 2)) \[\033[37m\]\$ "

alias clp="xclip -selection clipboard"

#shared bash history
export PROMPT_COMMAND="history -a; history -n"

lhartikk

[
{ "keys": ["alt+right"], "command": "next_view" },
{ "keys": ["alt+left"], "command": "prev_view" } ,
{ "keys": ["ctrl+shift+r"], "command": "show_overlay", "args": {"overlay": "goto", "show_files": true}}
]

lhartikk

fallocate -l 4G /swapfile
sudo chmod 600 /swapfile
mkswap /swapfile
swapon /swapfile

lhartikk

sudo apt-get install bridge-utils
sudo pkill docker
sudo iptables -t nat -F
sudo ifconfig docker0 down
sudo brctl delbr docker0
sudo service docker start

lhartikk

class Block {
    constructor(index, previousHash, timestamp, data, hash) {
        this.index = index;
        this.previousHash = previousHash.toString();
        this.timestamp = timestamp;
        this.data = data;
        this.hash = hash.toString();
    }
}

lhartikk

var calculateHash = (index, previousHash, timestamp, data) => {
    return CryptoJS.SHA256(index + previousHash + timestamp + data).toString();
};

lhartikk

var generateNextBlock = (blockData) => {
    var previousBlock = getLatestBlock();
    var nextIndex = previousBlock.index + 1;
    var nextTimestamp = new Date().getTime() / 1000;
    var nextHash = calculateHash(nextIndex, previousBlock.hash, nextTimestamp, blockData);
    return new Block(nextIndex, previousBlock.hash, nextTimestamp, blockData, nextHash);
};

lhartikk

var getGenesisBlock = () => {
    return new Block(0, "0", 1465154705, "my genesis block!!", "816534932c2b7154836da6afc367695e6337db8a921823784c14378abed4f7d7");
};

var blockchain = [getGenesisBlock()];

lhartikk

var isValidNewBlock = (newBlock, previousBlock) => {
    if (previousBlock.index + 1 !== newBlock.index) {
        console.log('invalid index');
        return false;
    } else if (previousBlock.hash !== newBlock.previousHash) {
        console.log('invalid previoushash');
        return false;
    } else if (calculateHashForBlock(newBlock) !== newBlock.hash) {
        console.log('invalid hash: ' + calculateHashForBlock(newBlock) + ' ' + newBlock.hash);
        return false;

lhartikk

var replaceChain = (newBlocks) => {
    if (isValidChain(newBlocks) && newBlocks.length > blockchain.length) {
        console.log('Received blockchain is valid. Replacing current blockchain with received blockchain');
        blockchain = newBlocks;
        broadcast(responseLatestMsg());
    } else {
        console.log('Received blockchain invalid');
    }
};