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New Smart Contract Verification

The 0x address supplied on contract creation.
Choose a smart-contract verification method. Currently, Blockscout supports 2 methods:
1. Verification through flattened source code.
2. Verification using Standard input JSON file.
3. Verification through Sourcify.
a) if smart-contract already verified on Sourcify, it will automatically fetch the data from the repo
b) otherwise you will be asked to upload source files and JSON metadata file(s).
4. Verification of Vyper contract.
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