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forge-verify-contract.md

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forge verify-contract

NAME

forge-verify-contract - Verify smart contracts on a chosen verification provider.

SYNOPSIS

forge verify-contract [options] address contract

DESCRIPTION

Verifies a smart contract on a chosen verification provider.

You must provide:

  • The contract address
  • The contract name or the path to the contract (read below) In case of Etherscan verification, you must also provide:
  • Your Etherscan API key, either by passing it as an argument or setting ETHERSCAN_API_KEY

To find the exact compiler version, run ~/.svm/x.y.z/solc-x.y.z --version and search for the 8 hex digits in the version string here.

The path to the contract is in the format <path>:<contract>, e.g. src/Contract.sol:Contract.

By default, smart contracts are verified in a multi-file fashion. If you want to flatten the contract before verifying, pass --flatten.

This command will try to compile the source code of the flattened contract if --flatten is passed before verifying. If you do not want that, pass --force.

You can specify ABI-encoded constructor arguments with --constructor-args. Alternatively, you can specify a file containing space-separated constructor arguments with --constructor-args-path. (Note that cache must be enabled in the config for the latter to work.)

OPTIONS

Verify Contract Options

{{#include ../common/verifier-options.md}}

--compiler-version version
    The compiler version used to build the smart contract.

    To find the exact compiler version, run ~/.svm/x.y.z/solc-x.y.z --version where x and y are major and minor version numbers respectively, then search for the 8 hex digits in the version string here.

--num-of-optimizations num
--optimizer-runs num
    The number of optimization runs used to build the smart contract.

--constructor-args args
    The ABI-encoded constructor arguments. Conflicts with --constructor-args-path.

--constructor-args-path file
    The path to a file containing the constructor arguments. Conflicts with --constructor-args.

--chain-id chain
--chain chain
    The ID or name of the chain the contract is deployed to.
    Default: mainnet

--flatten
    Flag indicating whether to flatten the source code before verifying.

    If this flag is not provided, the JSON standard input will be used instead.

-f
--force
    Do not compile the flattened smart contract before verifying.

{{#include ../common/retry-options.md}}

--show-standard-json-input
    Command outputs JSON suitable for saving to a file and uploading to block explorers for verification.

--watch
    Wait for verification result after submission.
    Automatically runs forge verify-check until the verification either fails or succeeds.

{{#include project-options.md}}

{{#include common-options.md}}

EXAMPLES

  1. Verify a contract with JSON standard input on Etherscan

    forge verify-contract <address> SomeContract --watch

  2. Verify a contract on a custom Sourcify instance

    forge verify-contract --verifier sourcify \
  --verifier-url http://localhost:5000 <address> SomeContract

  3. Verify a flattened contract built with solc v0.8.11+commit.d7f03943:

    forge verify-contract --flatten --watch --compiler-version "v0.8.11+commit.d7f03943" \
  --constructor-args $(cast abi-encode "constructor(string,string,uint256,uint256)" "ForgeUSD" "FUSD" 18 1000000000000000000000) \
  <address> MyToken

  4. Verify a flattened contract by specifying constructor arguments in a file:

    forge verify-contract --flatten --watch --compiler-version "v0.8.11+commit.d7f03943" \
  --constructor-args-path constructor-args.txt <address> src/Token.sol:MyToken

    where constructor-args.txt contains the following content:

    ForgeUSD FUSD 18 1000000000000000000000

  5. Verify a contract with Blockscout right after deployment (make sure you add "/api?" to the end of the Blockscout homepage explorer URL):

    forge create --rpc-url <rpc_https_endpoint> --private-key $devTestnetPrivateKey src/Contract.sol:SimpleStorage --verify --verifier blockscout --verifier-url <blockscout_homepage_explorer_url>/api?

SEE ALSO

forge, forge create, forge flatten, forge verify-check