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An enterprise-grade Java-based, Apache 2.0 licensed Ethereum client https://wiki.hyperledger.org/display/besu
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besu/docs/Configuring-Pantheon/Contracts-in-Genesis.md

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description: Pre-deploying contracts in genesis file

Predeploying Contracts in the Genesis File

To predeploy contracts when starting Pantheon, specify contract code in the genesis file.

!!! example "Contract Code in Genesis File" json { ... "alloc": { "0x0ffd23af8eebc60b3cfdeed6f814988757237314": { "balance": "0x100000000000000000000000000000000000000000000000000", "code": "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", "storage": { "7aa07e0c924147697605046b7c2c32645b7bbfb41e0ac5d0a84ac93cbb759798": "0000000000000000000000000000000000000000000000000000000000000001", "cea2b0602db61f92b76ec4402875cc38eedc9fc425cb1b697fc2265d50fc20fb": "0000000000000000000000000000000000000000000000000000000000000001", } } }, ... }

The contract code in the genesis file defines:

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