class Geth < Formula
  desc "Official Go implementation of the Ethereum protocol"
  homepage "https://ethereum.github.io/go-ethereum/"
  url "https://github.com/ethereum/go-ethereum/archive/v1.8.3.tar.gz"
  sha256 "6c935e33006ab26c69dc083c7b471759812cd8cef5e1ec783f005d3c58a98621"
  head "https://github.com/ethereum/go-ethereum.git"

  bottle do
    cellar :any_skip_relocation
    sha256 "eac33b906e7a3beb4e81a5e8a549516dab9e80fe732fd9de7d25e2f43a118d19" => :high_sierra
    sha256 "5ee90cabf60b426bdcacee796d82836e4e5c62b144ed52273b95cfb77bc59d9f" => :sierra
    sha256 "b87dc86fabca99a4a35b804163ed2c74797c123e2bf3c101f6a6f2fd28fb084c" => :el_capitan
  end

  depends_on "go" => :build

  def install
    system "make", "all"
    bin.install Dir["build/bin/*"]
  end

  test do
    (testpath/"genesis.json").write <<~EOS
      {
        "config": {
          "homesteadBlock": 10
        },
        "nonce": "0",
        "difficulty": "0x20000",
        "mixhash": "0x00000000000000000000000000000000000000647572616c65787365646c6578",
        "coinbase": "0x0000000000000000000000000000000000000000",
        "timestamp": "0x00",
        "parentHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
        "extraData": "0x",
        "gasLimit": "0x2FEFD8",
        "alloc": {}
      }
    EOS
    system "#{bin}/geth", "--datadir", "testchain", "init", "genesis.json"
    assert_predicate testpath/"testchain/geth/chaindata/000001.log", :exist?,
                     "Failed to create log file"
  end
end