# Discussion - What's Missing for Motoko Adoption?

**URL:** <https://forum.dfinity.org/t/discussion-whats-missing-for-motoko-adoption/53429>\
**Category:** Motoko\
**Created:** [July 17, 2025, 5:39pm UTC](https://forum.dfinity.org/t/discussion-whats-missing-for-motoko-adoption/53429 "2025-07-17T17:39:39Z")\
**Posts on this page:** 1\
**Showing post:** 19

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**Author:** ![Lorimer](https://sea1.discourse-cdn.com/flex023/user_avatar/forum.dfinity.org/lorimer/32/17601_2.png) [@Lorimer](https://forum.dfinity.org/u/Lorimer)\
**Post date:** [July 24, 2025, 10:25am UTC](https://forum.dfinity.org/t/discussion-whats-missing-for-motoko-adoption/53429/19 "2025-07-24T10:25:39Z")

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Also, implicit conversion between `Blob` and `[Nat8]`, please.

This is an unnecessary pain point given that these types are essentially the same thing. I’m currently battling through similar issues to those mentioned two years ago → [Confusing type error when crossing canisters: expression of type MyType cannot produce expected type MyType\_\_1 - Developers - Internet Computer Developer Forum](https://forum.dfinity.org/t/confusing-type-error-when-crossing-canisters-expression-of-type-mytype-cannot-produce-expected-type-mytype-1/20636)

Everything ran locally fine. I had the ICP index canister defined in dfx.json as a remote canister, pointing to the released did and wasm. I was using `get_account_transactions` with the subaccount in the account object defined as `Blob`. As mentioned, all runs fine locally.

As soon as I try to deploy I get the error that the type is expected to be `[Nat8]`. Not sure why this wasn’t a problem locally, given that the did I am referencing for the index canister also defines it as `[Nat8]`. Anyway, I’ve just made the changes locally to use `[Nat8]` instead of `Blob` (which seems to require clunky conversions that could just be implicit - `Option.map<[Nat8], Blob>(acc.subaccount, Blob.fromArray)`).

The trouble is I get the opposite error now locally than I was getting when trying to deploy. Locally the compiler wants `Blob` for that index canister call (despite the `vec nat8` in the did I’m using). I’ve tried a clean rebuild. I suspect there’s something I’m missing that I’ll figure out shortly. This is no doubt an unnecessary paint point though.

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