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For example, I want to deploy a contract to my local testnet. But I only have its opcode from etherscan. How to deploy the contract with just those runtime bytecode?

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You will also need ABI, not just bytecode. Look at the next article, it will give you good starting point: https://medium.com/@prashantprabhakarsingh/deploying-contract-using-bytecode-myetherwallet-and-remix-10f643a82d40

  • You do not need the ABI to deploy a contract. It is needed if you want to interact with the contract. – Ismael Sep 30 '18 at 15:50
  • How can you set constructor parameters if you don't have ABI? – KwahuNashoba Oct 1 '18 at 13:29
  • You are correct! If the constructor need parameters you only need the constructor ABI. – Ismael Oct 1 '18 at 17:15

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