Ethereum geth sendTransaction错误：用于天然气价格的资金不足+；价值

我在一个私人网络中尝试geth，当我尝试sendTransaction时，失败的原因是“错误：用于天然气的资金不足*价格+价值”

但账户余额[0]为4785，似乎足够了

web3.fromWei(eth.getBalance(eth.accounts[0]), "ether")
4785

我试过的命令是

eth.sendTransaction({from: eth.accounts[0], to: eth.accounts[1], value: web3.toWei(1, "ether"), gas: 1})

genesis json文件是

{
  "config": {
        "chainId": 0,
        "homesteadBlock": 0,
        "eip155Block": 0,
        "eip158Block": 0
    },
  "alloc"      : {},
  "coinbase"   : "0x0000000000000000000000000000000000000000",
  "difficulty" : "0x20000",
  "extraData"  : "",
  "gasLimit"   : "0x2fefd8",
  "nonce"      : "0x0000000000000042",
  "mixhash"    : "0x0000000000000000000000000000000000000000000000000000000000000000",
  "parentHash" : "0x0000000000000000000000000000000000000000000000000000000000000000",
  "timestamp"  : "0x00"
}

geth版本：1.7.1

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有人知道出了什么问题吗？

我自己解决了这个问题。原因是chainId为0。当我设置CHAINID8888时，它工作得很好