Dakavon / B9labETHsub-Nostradamus

B9lab Ethereum Developer Course: Nostradamus Challenge

B9lab ETH-SUB: Nostradamus Challenge

Challenge set up and assisted by B9lab (https://academy.b9lab.com)

Challenge time! Can you guess the next block's values? If you think you can, prove it by having your address return true here https://ropsten.etherscan.io/address/0x8A879BCCd75B9cb17cc9DC9a69820A794cae0b1E#readContract.

Steps towards success

1. Wrote contract TheProphecy.sol and compiled with Remix
2. Copied ABI and Bytecode (see folder text files)
3. Due to nicely formatted output converted ABI in a one-liner: tr -d "\n\r\t" < ABI\ \(copied\ from\ Remix\).txt > ABIforGeth.txt
4. Within geth console:

   •   var TheProphecyContractABI = _ConvertedABI_

   •   var TheProphecyContract = web3.eth.contract(TheProphecyContractABI)

   •   var TheProphecyInstance = TheProphecyContract.new(
       	{
       		from: eth.accounts[0],
       		data: _RemixBytecode_,
       		gas: 100000
       	}, function(e, contract){
       		console.log(e, contract);
       		if (typeof contract.address !== 'undefined') {
       			console.log('Contract mined! address: ' + contract.address + ' transactionHash: ' + contract.transactionHash);
       			}
       		}
       	)

   •   TheProphecyInstance.prophesy("Heyho! Its Niels!\n \xF0\x9F\x98\x8E", {from: eth.accounts[0]})