class Ethereum < Formula
  desc "Official Go implementation of the Ethereum protocol"
  homepage "https://ethereum.github.io/go-ethereum/"
  url "https://github.com/ethereum/go-ethereum/archive/v1.9.6.tar.gz"
  sha256 "3000f787735ee302088d17d406eafc2ec26eaffc083d876b2fa07ec7dfbb94f9"
  head "https://github.com/ethereum/go-ethereum.git"

  bottle do
    cellar :any_skip_relocation
    sha256 "47c6bfeceafa4f7f944783eb770f17a2b4458498ff9dc832cd688fc241a32b76" => :catalina
    sha256 "3b514c9fd14068836f8b3b5e23b7073da14d7e37ac3165abebdd6b4c909d67c2" => :mojave
    sha256 "340197f0771e3839ba584f6c7b34ce6d33ad7f084af4b54ab028d24628c649d4" => :high_sierra
  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