revertWithCustomError requires interface property on a contract

[bogdan]

Version of Hardhat

2.22.17

What happened?

revertedWithCustomError requires interface property to exist on an object, which is not present for contract obtained from getContractAt

Minimal reproduction steps

      const contract = await hre.viem.getContractAt(
        "MinterRoleMock",
        minterRole.address,
        { client: { wallet: minter } }
      );

      await expect(contract.write.grantMinter([other1.account.address]))
        .to.be.revertedWithCustomError(contract, "OwnableUnauthorizedAccount")

Search terms

hardhat-chai-matchers chai revert test

[schaable]

Hi @bogdan, revertedWithCustomError is a Hardhat Chai matcher, which were designed to work specifically with hardhat-ethers. It won’t work as expected with hardhat-viem.

We’re planning to introduce viem-specific matchers in Hardhat 3. For now, the simplest alternative is to assert the rejection message directly:

await expect(contract.write.grantMinter([other1.account.address])).to.be.rejectedWith(
  "your rejection message"
);

Let me know if you have any other questions!