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How to verify with Hardhat or Truffle a smart contract using OpenZeppelin Contracts

For a complete list of resources regarding verification visit How to verify a contract on Etherscan/BscScan/PolygonScan. The recommended way to verify a smart contract inheriting from OpenZeppelin Contracts is as a "multi-file" contract (corresponding to the Standard-Json-Input compiler type on Etherscan). It is easier to read, imports are maintained, licenses are maintained. Verified using Hardhat Verified using Truffle Hardhat Hardhat has an Etherscan plugin: Hardhat Etherscan plugin N…

How to flatten and verify a smart contract using OpenZeppelin Contracts

For a complete list of resources regarding verification visit How to verify a contract on Etherscan/BscScan/PolygonScan. This guide uses flattening for verification, but we recommend doing multifile verification as it is easier to read, maintains licenses and imports. See guide at How to automatically verify smart contract using from OpenZeppelin Contracts with Hardhat or Truffle. To verify a contract inheriting from OpenZeppelin Contracts you can create a single file (flat) contract using tr…