genesis.json

{
  "config": {
    "chainId": 12345,
    "homesteadBlock": 0,
    "eip150Block": 0,
    "eip155Block": 0,
    "eip158Block": 0,
    "byzantiumBlock": 0,
    "constantinopleBlock": 0,
    "petersburgBlock": 0,
    "istanbulBlock": 0,
    "berlinBlock": 0,
    "clique": {
      "period": 5,
      "epoch": 30000
    }
  },
  "difficulty": "1",
  "gasLimit": "8000000",
  "extradata": "0x00000000000000000000000000000000000000000000000000000000000000005857c270fec8c3483d0e0acc7f9fa1bafdd3b0150000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
  "alloc": {
    "5857c270fec8c3483d0e0acc7f9fa1bafdd3b015": { "balance": "400000" },
    "b6c3b32605ca387bb7bafe90c9ece6b675e829c9": { "balance": "300000" }
  }
}