Skip to content
You are reading Hyperledger Besu development version documentation and some displayed features may not be available in the stable release. You can switch to stable version using the version box at screen bottom.
Date of last update: August 8, 2022

Pre-deploy contracts in the genesis file

To pre-deploy contracts when starting Besu, specify the contract code in the genesis file.

Contract code in the genesis file

{
  ...
  "alloc": {
      "0x0ffd23af8eebc60b3cfdeed6f814988757237314": {
      "balance": "0x100000000000000000000000000000000000000000000000000",
      "code": "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",
      "storage": {
        "7aa07e0c924147697605046b7c2c32645b7bbfb41e0ac5d0a84ac93cbb759798": "0000000000000000000000000000000000000000000000000000000000000001",
        "cea2b0602db61f92b76ec4402875cc38eedc9fc425cb1b697fc2265d50fc20fb": "0000000000000000000000000000000000000000000000000000000000000001",
      }
    }
  },
  ...
}

The contract code in the genesis file defines the:

  • Address.
  • Balance.
  • Bytecode.
  • Key value pairs for contract storage.