Questions tagged [typescript]
TypeScript is a typed superset of JavaScript that transpiles to plain JavaScript. It adds optional types, classes, interfaces, and modules to JavaScript. This tag is for questions specific to TypeScript. It is not used for general JavaScript questions.
27
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7
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generate types from chain does not work. Documentation is not clear
I dont think typegen is working as expected per documentation, by following the provided example and adapting it to my parachain.
`
Found 244 errors in 5 files.
Errors Files
5 src/interfaces/augment-...
- 45
2
votes
1
answer
36
views
Is `createType` safe to use in polkadot-js/api
In this comment of pjs github, it says that we should never do the following:
const something = api.createType('SomeType', { foo: 'bar' });
...
await api.tx.somewhere.something(something);
...
and ...
- 1,066
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0
answers
20
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Substrate enum to typescript(polkadot-js)
I am new to Substrate and Polkadot-JS. I am attempting to convert this enum with values to TypeScript, but I haven't been successful so far.
I really appreciate any help you can provide.
pub enum ...
- 11
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12
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Polkadot Typegen importing JS extension instead of TS
We are using the typegen to create types for our custom chain.
Following the docs
The code that is generated is kinda strange. In the augment-api.ts file it tries to import all the other generated ts ...
- 341
1
vote
1
answer
39
views
Decode event data
I am learning to use polkadotjs api, I am trying to send a system.remarkWithEvent and then get the event that this created and decode de output to verify that the remark is there.
The sending of the ...
3
votes
1
answer
37
views
subscriptions with parameters in polkadot.js api
I am using React+Typescript and trying to retrieve data from a struc using a query subscription. I first tried the following in order to check that I'm retrieving the right data:
api.query.rolesModule....
- 385
2
votes
1
answer
71
views
api.createType does not work?
I would like to create a type called XcmVersionedMultiLocation. It can be imported using the following code:
import { XcmVersionedMultiLocation } from "@polkadot/types/lookup";
To create an ...
- 371
3
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0
answers
35
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How to get runtime types in polkadotjs (typescript)
In subxt we can have Rust types directly from scale-encoded runtime metadata. Is the same possible in polkadotjs? Is there a "polkadots" which has typescript types automatically derived from ...
- 307
3
votes
1
answer
93
views
What informations consist of a signature which is generated when siging a transaction payload offline?
From the wiki (https://wiki.polkadot.network/docs/build-transaction-construction),
import { createSignedTx } from "@substrate/txwrapper-polkadot";
// Example code, replace `signWithAlice` ...
- 71
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24
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what is the correct typescript syntax for declaring the return type of session.queuedKeys()
in this pull request, i attempt to add support for looking up the collator account associated with a given nimbus session key.
the method implementation in the pr is as follows:
export function ...
- 456
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18
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Where in PJS Apps are signatures added to transactions & submitted?
I have been following the path of a Ledger submitted transaction on Polkadot JS Apps, and have found that the Ledger device is generating a signature here in hw-ledger/src/bundle.ts.
I am unable ...
- 131
1
vote
1
answer
97
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Invalid Transaction: Transaction has a bad signature - Ledger signature into tx
I am attempting to submit a transaction using Polkadot JS API and a signature that has been signed by Ledger. Upon passing it to send I get the Invalid Transaction: Transaction has a bad signature ...
- 131
2
votes
1
answer
40
views
Errors on generated code from Typegen
We are following the polkadot{.js} docs on TypeScript user generated for Chain modules. We are trying to get our custom chain module types into Typescript. We can generate fine however the generated ...
- 341
2
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1
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105
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MultiLocation type polkadot js
I am trying to figure out correct way how to type MultiLocation type
I thought that I would do
import {MultiLocation} from "@polkadot/types/interfaces"
const location: MultiLocation = {
...
- 371
2
votes
1
answer
96
views
How do I include a tip for transactions using Polkadot.JS/API
I am attempting to add a tip to a transaction in the following manner:
const batch = await api.tx.utility.batch([...]);
batch.tip = 1;
It appears that tip is a read-only property and I'm receiving an ...
1
vote
1
answer
87
views
Custom ChargeTransactionPayment type for extrinsics
if the type for extrinsic verification pub struct ChargeTransactionPayment<T: Config> has been changed on a chain, how do we update the polkadot.js API to use the new types? Suppose the type has ...
1
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0
answers
14
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UnsubscribePromise not being returned from subscription
When I try to create a subscription from a custom pallet, it doesn't return a UnsubscribePromise (like the native ones), but returns a Promise<Codec>, even though I added a callback as the last ...
- 11
0
votes
1
answer
158
views
How do we work with polkadot-js enums in TypeScript?
I used typegen to generate my types from definitions.
Definition
Person: {
status: 'Status',
balance: 'u128',
},
Status: {
_enum: ['Active',...
- 1,462
0
votes
1
answer
172
views
Extracting error from system.ExtrinsicFailed
I have a call to an extrinsic (in a Typescript/RxJS client) that is failing but I want to be able to catch the error that the extrinsic is throwing and not just that it failed.
const chainEvents: ...
- 530
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1
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216
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JavaScript/TypeScript: How to pass arguments of an array individually to a function?
I want to dynamically call contract functions. The only problem with this is,
that all of the functions have a different amount of variables.
As of now, the function looks like this:
async call(...
- 491
1
vote
2
answers
299
views
Typescript errors when using @polkadot/api
I'm building a typescript project and I'm trying to do the very simplest thing as a first step with Polkadot: Connect to a node and get account information. However, when I run tsc, it totally blows ...
- 109
3
votes
2
answers
129
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How to decorate polkadot.js api with upcoming runtime features
There's upcoming features coming to pallet uniques. They are now merged to master of substrate repo but not yet released. We would like to be prepared for it on Singular marketplace but not 100% sure ...
- 173
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2
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54
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Are there any tools available for creating a mock version of a contract in JS/TS?
Currently, we use "live" versions of our contracts running on a substrate contracts node in our JavaScript tests. This makes them integration tests and difficult to include in simple GitHub ...
- 1,462
1
vote
1
answer
70
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Polkadot{js} state queryies example not working
I am trying to run one of the examples in the Polkadot{.js} documentation and it is not working for me in TypeScript. This much works
const wsProvider = new WsProvider('wss://rpc.polkadot.io');
...
- 317
2
votes
2
answers
1k
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How to prevent / remove duplicate modules and mismatched version numbers (i.e. @polkdadot/types)?
I am still learning TypeScript and I have some code that is working, but it returns a lot of messages about multiple versions of modules and conflicting packages. What is the best way to fix these ...
- 317
1
vote
1
answer
60
views
How to do a democracy pallet vote using Polkadot API in typescript
I am trying to do a democracy vote using the API.
First I am getting the balance of my account:
const balance = (await api.query.system.account(my_account)).data.free;
const voteConfig: Vote = ...
- 185
2
votes
1
answer
214
views
How do you resolve missing type errors in the @polkadot/api v7.x.x packages?
Upgrading from:
// package.json
"@polkadot/api": "^6.7.2",
"@polkadot/types": "^6.7.2",
to:
// package.json
"@polkadot/api": "^7.7.1",
&...
- 225