ProviderError: Solidity custom error

[doerfli]

Hello there

I have this simple example of a Solidity smart contract - https://github.com/etherisc/gif-next/pull/54/files#diff-a5e5271117f0fb75c392f0715b7fe676cccc25cb339132cc9bf2d4c9077f8039
and a hardhat script to deploy it https://github.com/etherisc/gif-next/pull/54/files#diff-0e1d03ebd17c019a2e53fc06307e66883e93cef99b4c0e826d58159249f23147

Now the hardhat script will deploy it and execute three transactions, the first two are good, the third will revert (on purpose) with a custom error (https://github.com/etherisc/gif-next/pull/54/files#diff-a5e5271117f0fb75c392f0715b7fe676cccc25cb339132cc9bf2d4c9077f8039R24)

In the script a ProviderError is thrown, but i am interested in why this happened. How can i get to the custom error for that Error?

error: ProviderError: execution reverted
    at HttpProvider.request (/workspaces/gif-next/node_modules/hardhat/src/internal/core/providers/http.ts:88:21)
    at processTicksAndRejections (node:internal/process/task_queues:95:5)
    at async HardhatEthersProvider.estimateGas (/workspaces/gif-next/node_modules/@nomicfoundation/hardhat-ethers/src/internal/hardhat-ethers-provider.ts:237:27)
    at async /workspaces/gif-next/node_modules/@nomicfoundation/hardhat-ethers/src/signers.ts:235:35
    at async Promise.all (index 0)
    at async HardhatEthersSigner._sendUncheckedTransaction (/workspaces/gif-next/node_modules/@nomicfoundation/hardhat-ethers/src/signers.ts:256:7)
    at async HardhatEthersSigner.sendTransaction (/workspaces/gif-next/node_modules/@nomicfoundation/hardhat-ethers/src/signers.ts:125:18)
    at async send (/workspaces/gif-next/node_modules/ethers/src.ts/contract/contract.ts:299:20)
    at async Proxy.increment (/workspaces/gif-next/node_modules/ethers/src.ts/contract/contract.ts:338:16)
    at async /workspaces/gif-next/scripts/experiment/errors/deployAndRun.ts:24:49 {"timestamp":"2023-10-05 07:31:03"}

Thanks,
Marc