bitchin tricks

Bitchin' Tricks

Geth

General

• My shit client doesn't work! 🖕

git pull

Mining

• I only want to mine when there are transactions!

var mining_threads = 1

function checkWork() {
    if (eth.getBlock("pending").transactions.length > 0) {
        if (eth.mining) return;
        console.log("== Pending transactions! Mining...");
        miner.start(mining_threads);
    } else {
        miner.stop();
        console.log("== No transactions! Mining stopped.");
    }
}

eth.filter("latest", function(err, block) { checkWork(); });
eth.filter("pending", function(err, block) { checkWork(); });

checkWork();

Courtesy @chfast

Quick scripts

• I want to get some data out without running a node!

$ geth --exec "eth.accounts" console 2>/dev/null
["0x0000000000000000000000000000000000000000"]

• I want to get some data out without RPC magic!

$ geth --exec "eth.accounts" attach
["0x0000000000000000000000000000000000000000"]