chore: 🤖 legacy interface support

[punkbit]

Why?

Should provide support for none snakecase version of the interface

[punkbit]

⚠️ Requires fix

error[E0658]: use of unstable library feature 'bool_to_option'
   --> src/main.rs:351:14
    |
351 |             .then_some(())
    |              ^^^^^^^^^
    |
    = note: see issue #80967 <https://github.com/rust-lang/rust/issues/80967> for more information

error[E0658]: use of unstable library feature 'bool_to_option'
   --> src/main.rs:585:14
    |
585 |             .then_some(())
    |              ^^^^^^^^^
    |
    = note: see issue #80967 <https://github.com/rust-lang/rust/issues/80967> for more information

error[E0658]: use of unstable library feature 'bool_to_option'
   --> src/main.rs:590:14
    |
590 |             .then_some(())
    |              ^^^^^^^^^
    |
    = note: see issue #80967 <https://github.com/rust-lang/rust/issues/80967> for more information

error[E0283]: type annotations needed
   --> src/main.rs:611:28
    |
611 |         Ok(ledger.inc_tx() - 1)
    |                            ^ cannot infer type for type `{integer}`
    |
    = note: multiple `impl`s satisfying `ic_cdk::export::candid::Nat: Sub<{integer}>` found in the `candid` crate:
            - impl Sub<i32> for ic_cdk::export::candid::Nat;
            - impl Sub<u128> for ic_cdk::export::candid::Nat;
            - impl Sub<u16> for ic_cdk::export::candid::Nat;
            - impl Sub<u32> for ic_cdk::export::candid::Nat;
            and 3 more

error[E0658]: use of unstable library feature 'bool_to_option'
   --> src/main.rs:625:14
    |
625 |             .then_some(())
    |              ^^^^^^^^^
    |
    = note: see issue #80967 <https://github.com/rust-lang/rust/issues/80967> for more information

error[E0283]: type annotations needed
   --> src/main.rs:651:28
    |
651 |         Ok(ledger.inc_tx() - 1)
    |                            ^ cannot infer type for type `{integer}`
    |
    = note: multiple `impl`s satisfying `ic_cdk::export::candid::Nat: Sub<{integer}>` found in the `candid` crate:
            - impl Sub<i32> for ic_cdk::export::candid::Nat;
            - impl Sub<u128> for ic_cdk::export::candid::Nat;
            - impl Sub<u16> for ic_cdk::export::candid::Nat;
            - impl Sub<u32> for ic_cdk::export::candid::Nat;
            and 3 more

error[E0658]: use of unstable library feature 'bool_to_option'
   --> src/main.rs:660:24
    |
660 |         to.ne(&caller).then_some(()).ok_or(NftError::SelfTransfer)?;
    |                        ^^^^^^^^^
    |
    = note: see issue #80967 <https://github.com/rust-lang/rust/issues/80967> for more information

error[E0658]: use of unstable library feature 'bool_to_option'
   --> src/main.rs:665:14
    |
665 |             .then_some(())
    |              ^^^^^^^^^
    |
    = note: see issue #80967 <https://github.com/rust-lang/rust/issues/80967> for more information

error[E0283]: type annotations needed
   --> src/main.rs:684:28
    |
684 |         Ok(ledger.inc_tx() - 1)
    |                            ^ cannot infer type for type `{integer}`
    |
    = note: multiple `impl`s satisfying `ic_cdk::export::candid::Nat: Sub<{integer}>` found in the `candid` crate:
            - impl Sub<i32> for ic_cdk::export::candid::Nat;
            - impl Sub<u128> for ic_cdk::export::candid::Nat;
            - impl Sub<u16> for ic_cdk::export::candid::Nat;
            - impl Sub<u32> for ic_cdk::export::candid::Nat;
            and 3 more

error[E0658]: use of unstable library feature 'bool_to_option'
   --> src/main.rs:697:23
    |
697 |         owner.ne(&to).then_some(()).ok_or(NftError::SelfTransfer)?;
    |                       ^^^^^^^^^
    |
    = note: see issue #80967 <https://github.com/rust-lang/rust/issues/80967> for more information

error[E0658]: use of unstable library feature 'bool_to_option'
   --> src/main.rs:702:14
    |
702 |             .then_some(())
    |              ^^^^^^^^^
    |
    = note: see issue #80967 <https://github.com/rust-lang/rust/issues/80967> for more information

error[E0658]: use of unstable library feature 'bool_to_option'
   --> src/main.rs:706:14
    |
706 |             .then_some(())
    |              ^^^^^^^^^
    |
    = note: see issue #80967 <https://github.com/rust-lang/rust/issues/80967> for more information

error[E0283]: type annotations needed
   --> src/main.rs:725:28
    |
725 |         Ok(ledger.inc_tx() - 1)
    |                            ^ cannot infer type for type `{integer}`
    |
    = note: multiple `impl`s satisfying `ic_cdk::export::candid::Nat: Sub<{integer}>` found in the `candid` crate:
            - impl Sub<i32> for ic_cdk::export::candid::Nat;
            - impl Sub<u128> for ic_cdk::export::candid::Nat;
            - impl Sub<u16> for ic_cdk::export::candid::Nat;
            - impl Sub<u32> for ic_cdk::export::candid::Nat;
            and 3 more

error[E0658]: use of unstable library feature 'bool_to_option'
   --> src/main.rs:741:14
    |
741 |             .then_some(())
    |              ^^^^^^^^^
    |
    = note: see issue #80967 <https://github.com/rust-lang/rust/issues/80967> for more information

error[E0283]: type annotations needed
   --> src/main.rs:775:28
    |
775 |         Ok(ledger.inc_tx() - 1)
    |                            ^ cannot infer type for type `{integer}`
    |
    = note: multiple `impl`s satisfying `ic_cdk::export::candid::Nat: Sub<{integer}>` found in the `candid` crate:
            - impl Sub<i32> for ic_cdk::export::candid::Nat;
            - impl Sub<u128> for ic_cdk::export::candid::Nat;
            - impl Sub<u16> for ic_cdk::export::candid::Nat;
            - impl Sub<u32> for ic_cdk::export::candid::Nat;
            and 3 more

error[E0658]: use of unstable library feature 'bool_to_option'
   --> src/main.rs:787:14
    |
787 |             .then_some(())
    |              ^^^^^^^^^
    |
    = note: see issue #80967 <https://github.com/rust-lang/rust/issues/80967> for more information

error[E0283]: type annotations needed
   --> src/main.rs:803:28
    |
803 |         Ok(ledger.inc_tx() - 1)
    |                            ^ cannot infer type for type `{integer}`
    |
    = note: multiple `impl`s satisfying `ic_cdk::export::candid::Nat: Sub<{integer}>` found in the `candid` crate:
            - impl Sub<i32> for ic_cdk::export::candid::Nat;
            - impl Sub<u128> for ic_cdk::export::candid::Nat;
            - impl Sub<u16> for ic_cdk::export::candid::Nat;
            - impl Sub<u32> for ic_cdk::export::candid::Nat;
            and 3 more

Some errors have detailed explanations: E0283, E0658.
For more information about an error, try `rustc --explain E0283`.
error: could not compile `crowns` due to 17 previous errors
Optimizing WASM module.
Original:          1.08 MiB
Stripping Unused Data Segments...
Pass did not result in smaller WASM... Skipping.
Executing a binaryen optimization...
    Size:          1.08 MiB (0.0% smaller)

Final Size: 1.08 MiB (0.0% smaller)
Error: Failed while trying to build all canisters.
Caused by: Failed while trying to build all canisters.
  The build step failed for canister 'vlhm2-4iaaa-aaaam-qaatq-cai' (crowns) with an embedded error: Failed to build Rust canister 'crowns'.: Failed to compile the rust package: crowns
Error: Failed while trying to deploy canisters.
Caused by: Failed while trying to deploy canisters.
  Failed to build call canisters.
    Failed while trying to build all canisters.
      The build step failed for canister 'renrk-eyaaa-aaaaa-aaada-cai' (crowns) with an embedded error: Failed to build custom canister crowns.: Failed to run sh -c 'cd dependencies/crowns && dfx build --network ic crowns'.: The custom tool failed.
Error: Failed update call.
Caused by: Failed update call.
  The replica returned an HTTP Error: Http Error: status 503 Service Unavailable, content type "", content: Requested canister has no wasm module

[ozwaldorf]

rust-lang/rust#80967

looks like this was stabilized, what version of rust are you running ? I have 1.63