{
    "name": "calaveras",
    "chainId": 123,
    "networkId": 123,
    "defaultHardfork": "berlin",
    "consensus": {
      "type": "poa",
      "algorithm": "clique",
      "clique": {
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    "comment": "The Calaveras testnet chain",
    "url": "https://github.com/ethereum/eth1.0-specs/blob/master/network-upgrades/client-integration-testnets/calaveras.md",
    "genesis": {
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      "gasLimit": "0x47b760",
      "difficulty": "0x1",
      "nonce": "0x0000000000000000",
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      "stateRoot": "0x664c93de37eb4a72953ea42b8c046cdb64c9f0b0bca5505ade8d970d49ebdb8c",
      "timestamp": "0x60b3877f"
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        "name": "chainstart",
        "block": 0,
        "forkHash": "0xe34c4aff"
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      {
        "name": "homestead",
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        "forkHash": "0xe34c4aff"
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      {
        "name": "dao",
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        "forkHash": "0xe34c4aff"
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      {
        "name": "tangerineWhistle",
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        "forkHash": "0xe34c4aff"
      },
      {
        "name": "spuriousDragon",
        "block": 0,
        "forkHash": "0xe34c4aff"
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      {
        "name": "byzantium",
        "block": 0,
        "forkHash": "0xe34c4aff"
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      {
        "name": "constantinople",
        "block": 0,
        "forkHash": "0xe34c4aff"
      },
      {
        "name": "petersburg",
        "block": 0,
        "forkHash": "0xe34c4aff"
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      {
        "name": "istanbul",
        "block": 0,
        "forkHash": "0xe34c4aff"
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      {
        "name": "berlin",
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        "forkHash": "0xe34c4aff"
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      {
        "name": "london",
        "block": 500,
        "forkHash": "0x173783e4"
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    "bootstrapNodes": [
      {
        "ip": "3.21.156.138",
        "port": 30303,
        "id": "39eb08bbfad87481553c471a63ff2a4b4885fffa4ff50f1cf46744d9ad6e2f764ede146fe4df563fa9ccda1a46b9b1a88fb08135e1bf1d71b320912499da773d",
        "location": "",
        "comment": "Calaveras bootnode 1"
      },
      {
        "ip": "3.9.20.133",
        "port": 30303,
        "id": "9e1096aa59862a6f164994cb5cb16f5124d6c992cdbf4535ff7dea43ea1512afe5448dca9df1b7ab0726129603f1a3336b631e4d7a1a44c94daddd03241587f9",
        "location": "",
        "comment": "Calaveras bootnode 2"
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    ]
  }