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Questions - substrate

Why does "code" in spec not start with magic number and version number?

I am creating spec using ./polkadot build-spec --disable-default-bootnode --dev (I am running version 0.9.8-3a10ee63c-x86_64-linux-gnu) spec generated using above command contains code field. My under...
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kishan sagathiya

webassembly

substrate

polkadot

Votes: 0

Answers: 1

Latest Answer

Wasm can be pretty hefty in its raw form. This leads to problems, for example, when upgrading from one version of the Substrate Runtime (the wasm file) to another. This is because the upgrade should f...
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pepyakin

How to create pallet errors that show up on the Polkadot JS apps interface?

So I've been at my wits' end for quite some time regarding #[pallet::error] showing up on Polkadot JS apps interface. So as I've come to understand following substrate kitties tutorial that we require...
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RequireKeys

substrate

polkadot-js

Votes: 0

Answers: 1

Latest Answer

I suspect that this is similar to util.batch - I suspect the sudo is successful whether the internal extrinsic(s) are successful or not and that the UI I suspect is not showing the aggregation of whet...
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Squirrel

Compile error in Substrate smart contract 'the trait bound ink_storage::Vec<...>: WrapperTypeEncode is not satisfied'

I'm a newbie on Substrate and blockchain development. Currently, I'm writing a smart contract using Substrate with ink!. I've defined a custom type (struct Person in the code) and created the vector o...
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Promlert Lovichit

substrate

Votes: 0

Answers: 1

Latest Answer

I think it will work if you use use ink_prelude::vec::Vec; instead of use ink_storage::collections::Vec;.
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driemworks

substrate-developer-hub/substrate-front-end-template run yarn error

run yarn build yarn run v1.22.17 $ react-scripts build Creating an optimized production build... Failed to compile. ./node_modules/@polkadot/api/node_modules/@polkadot/keyring/packageInfo.js 6:27 Mod...
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Salt

substrate

polkadot

Votes: 0

Answers: 1

Latest Answer

From my experience, I had the same issue and realized that it was because the dependency versions have updated beyond the yarn.lock file dependency versions. So when I would delete the yarn.lock file ...
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michaelassaf

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