[Ethereum] genesis 초기화 시 cannot unmarshal 에러 해결법

안녕하세요 멍개입니다.

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geth를 이용하여 네트워크 구축 시 genesis 파일을 만들게 됩니다.

{
  "config": {
    "chainId": 1234,
    "homesteadBlock": 0,
    "eip150Block": "0x0000000000000000000000000000000000000000000000000000000000000000",
    "eip155Block": 0,
    "eip158Block": 0,
    "byzantiumBlock": 0,
    "constantinopleBlock": 0,
    "petersburgBlock": 0,
    "istanbulBlock": 0,
    "berlinBlock": 0,
    "londonBlock": 0,
    "ethash": {}
  },
  "alloc": {
    "56aE1237F0D3E2F21683Bd04402092E26f469813":{"balance":"30000000000000000000000"},  
    "55e2d8BF452e1E7D70eb375B527fd38B281B00cF":{"balance":"30000000000000000000000" }
  },
  "coinbase": "0x56aE1237F0D3E2F21683Bd04402092E26f469813",
  "difficulty": "0x20000",
  "extraData": "",
  "gasLimit": "0x2fefd8",
  "nonce": "0x0000000000000042",
  "mixhash": "0x0000000000000000000000000000000000000000000000000000000000000000",
  "parentHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
  "timestamp": "0x00"
}

해당 내용으로 genesis.json으로 만들었다면 다음과 같이 genesis 초기화를 시킬 수 있습니다.

$ geth --datadir $PWD init genesis.json
Fatal: invalid genesis file: math/big: cannot unmarshal "\"0000000000000000000000000000000000000000000000000000000000000000\"" into a *big.Int

해당 에러는 0x000000이 Int 타입이 아니라 발생하는 에러입니다.

{
  "config": {
    "chainId": 1234,
    "homesteadBlock": 0,
    "eip150Block": 0,
    "eip155Block": 0,
    "eip158Block": 0,
    "byzantiumBlock": 0,
    "constantinopleBlock": 0,
    "petersburgBlock": 0,
    "istanbulBlock": 0,
    "ethash": {}
  },
  "alloc": {
    "56aE1237F0D3E2F21683Bd04402092E26f469813":{"balance":"30000000000000000000000"},  
    "55e2d8BF452e1E7D70eb375B527fd38B281B00cF":{"balance":"30000000000000000000000" }
  },
  "coinbase": "0x56aE1237F0D3E2F21683Bd04402092E26f469813",
  "difficulty": "0x20000",
  "extraData": "",
  "gasLimit": "0x2fefd8",
  "nonce": "0x0000000000000042",
  "mixhash": "0x0000000000000000000000000000000000000000000000000000000000000000",
  "parentHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
  "timestamp": "0x00"
}

정상적으로 초기화되는 모습을 확인할 수 있습니다.