genesis.json

{
  "config": {
    "chainId": 6699,
    "homesteadBlock": 0,
    "eip150Block": 0,
    "eip155Block": 0,
    "eip158Block": 0,
    "byzantiumBlock": 0,
    "constantinopleBlock": 0,
    "petersburgBlock": 0,
    "istanbulBlock": 0,
    "muirGlacierBlock": 0,
    "berlinBlock": 0,
    "londonBlock": 0,
    "arrowGlacierBlock": 0,
    "grayGlacierBlock": 0,
    "ethash": {}
  },
  "difficulty": "1",
  "gasLimit": "800000000",
   "extradata": "0x00000000000000000000000000000000000000000000000000000000000000007901a07e58c7533abcdc0f39a837d26de705ec3d0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
  "alloc": {
    "b6686d487c7eB0b1C3eBBA94EA8CB76438d5cc96": { "balance": "10000000000000000000000000" },
    "b0703E5d2C2CC11617dE4b84f1ec50F6536cCF1a": { "balance": "100000000000000000000000" }
  }
}