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/v1.9.5.tar.gz"
  sha256 "e3972fa7c3883d6c5672c4d9bc9a087b7c224810b35cf4d146f9ac9de4e3bf90"
  head "https://github.com/ethereum/go-ethereum.git"

  bottle do
    cellar :any_skip_relocation
    sha256 "908a6f05fafcfae768857a54414e81b299071007f0b7a844c35f3a1265c0e741" => :mojave
    sha256 "4275e63d14b8d6a04651e7115c3367a17aefe91f6765894188a62086c1f5909b" => :high_sierra
    sha256 "76a383b0803d27b859c3095d9102660ef1fe89ca77e4cfb7c093efa6a823facd" => :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