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The following contract (Hic Et Nunc Marketplace V1) contains the deprecated instruction SUB on type mutez:

https://github.com/hicetnunc2000/objkt-swap/blob/master/michelson/objkt_swap_v1.tz

I want to deploy this contract out of curiosity.

How do I patch it properly so that I can deploy the contract to e.g. Ghostnet? Although I attempted replacing the deprecated instructions with SUB_MUTEZ, I still haven't been able to deploy the contract. This boils down to me not fully understanding which SUB instructions are the ones that need to be replaced.

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1 Answer 1

Reset to default
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SUB_MUTEZ is resulting in OPTION MUTEZ, which has to be consumed.

Thus, you have to replace the corresponding SUB with:

SUB_MUTEZ;
IF_NONE { FAIL } {};

For your specific contract you have to replace the SUB at line 821, since this is the instruction which tries to subtract MUTEZ values.

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  • Thank you. I thought so, yet after replacing said instruction, I'm confronted with another error: ``` At line 496 characters 26 to 41, wrong stack type for instruction TRANSFER_TOKENS: [] ``` Checking further via: ``` octez-client typecheck script test.tz -v At line 4583 characters 26 to 41, wrong stack type for instruction TRANSFER_TOKENS: []. Fatal error: ill-typed script ```
    – mathematicsenthusiast
    Commented Oct 13, 2023 at 6:10
  • It works for me and the above linked contract. Sry, cant' help. Or you have to post more information (your changed contract, versions, etc.).
    – ghast
    Commented Oct 13, 2023 at 6:38
  • At first attempt I didn't realize that I need to replace the corresponding instruction with both lines you posted, which I now did. Cheers! Followup question, how can I (automatically, like in a script) detect which SUB instructions must be replaced?
    – mathematicsenthusiast
    Commented Oct 13, 2023 at 7:09
  • Can't see a nice solution for this. However, you could try: 1) Run octez-client with flag -v (like you already did). 2) Identify the place where there are no more any comments for the instructions. 3) Replace the SUB with the replacement code. Redo the steps above.
    – ghast
    Commented Oct 13, 2023 at 7:28

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