Questions tagged [substrate-front-end]

The tag has no usage guidance.

Filter by
Sorted by
Tagged with
0 votes
0 answers
20 views

When i built my custom pallet i got this error

#! [cfg_attr(not(feature = "std"), no_std)] // Re-export pallet items so that they can be accessed from the crate namespace. pub use pallet::*; #[frame_support::pallet] pub mod pallet { use ...
Preethi M's user avatar
1 vote
1 answer
30 views

iOS Swift Create Signed and Unsigned Payload in Susbtrate Blockchain

I'm using this library to interact substrate blockchain https://github.com/sublabdev/substrate-client-swift Can anyone explored before tell me how to create and use signed and unsigned payload?
Abhishek Thapliyal's user avatar
1 vote
1 answer
36 views

query storage to front-end

In the pallet-template, I have this storage: #[pallet::storage] #[pallet::getter(fn getscoreboard)] pub(super) type ScoreBoard<T: Config> = StorageMap <_, Twox64Concat, T::...
MinhK's user avatar
  • 115
1 vote
1 answer
19 views

Extrinsic with BalanceOf<T> and UI

Many Substrate pallets extrinsics take a Balance type, for example balances->transfer or bounties->create. The Polkadot/substrate Development UI somehow detects that it is a Token related field ...
rvalle's user avatar
  • 45
2 votes
2 answers
45 views

How to imagine a real Substrate app?

How to imagine a real Substrate application? I am trying to make an application, where you can trade your own product. You can advertise product, buy, list, see your earlier purchases, etc... If I ...
Vamosz's user avatar
  • 55
0 votes
0 answers
12 views

How to get Typegen to use the Custom RPC Runtime

We have implemented custom template pallet rpc methods and they are visible when doing a call to the node on rpc.methods we get template_sum5 template_sumAndStore however typegen is not adding them......
donkeydonkey's user avatar
0 votes
0 answers
34 views

Build a blockchain

I'm following substrate documentation in that build a blockchain tutorial while following the monitoring node metrics tutorial. I got stuck while installing prometheus on my ec2 instance is there any ...
Preethi M's user avatar
1 vote
1 answer
37 views

I got this error while building a blockchain (building a local blockchain)

when i run node template without --ws external its producing blocks but when i run with --ws external its giving me error please help me fix this im new to substrate.
Preethi M's user avatar
1 vote
1 answer
60 views

How to pass value as a argument in send transactions?

An error occurred: 'Expected 2 arguments for the contract message 'vote', but only 1 was provided.First argument was number type, and the second one was Enum . This error arises when attempting to ...
Mozammil Raja's user avatar
0 votes
1 answer
48 views

While authorizing specific nodes in building a blockchain i got the following error

I got this error while authorizing specific nodes in building a blockchain. It gives me error like this. error: failed to select a version for `bounded-collections`. ... required by package `sp-...
Preethi M's user avatar
0 votes
1 answer
23 views

how to query in the substrate node?

I want to get collection data using collectionId 1 the collection was created on the on the node already with the id 1. How can I do this is substrate? Any CLI tools?
Ganesh11's user avatar
  • 1,239
1 vote
0 answers
79 views

How to make substrate-node-template accessible via wss connection?

I just ran substrate-node-template on dedicated server and connected with substrate-frontend-template. Everything works fine with http(ws), but when I try to connect via https(wss) it's not working(?) ...
Марина Онищенко's user avatar
1 vote
2 answers
111 views

Reading contract value returns null

Facing an issue while trying to query for a value in my contract. The value keeps getting retuned as null with an error. However, it works fine on substrate Contracts UI Front end Dapp : const ...
0xD1x0n's user avatar
  • 119
2 votes
2 answers
199 views

How to start substrate-node-template and substrate-front-end-template remotely?

I want to start my own blockchain. I try to start substrate-node-template and substrate-front-end-template remotely, but there is guide instructions only for local machine. I installed and compiled ...
Марина Онищенко's user avatar
1 vote
1 answer
149 views

How to interact substrate node with reactjs frontend?

In ink! smart contract, we upload .contract file on chain and get the deployed contract address and use metadata.json file in frontend to interact with contract. Can someone tell me what's the ...
Ganesh11's user avatar
  • 1,239
5 votes
1 answer
45 views

How do I get the currently logged address in front end template?

What I´m trying to do is to condition some option/modal to be shown in the screen depending on the logged user/account being the owner or not so to have something similar to: accountPair.address === ...
Xavier's user avatar
  • 415
2 votes
1 answer
44 views

Output null when using ContractPromise for ink! v4 smart contract

I create a smart contract using ink! v4.2 and deploy it using contracts-ui.substrate.io Then in my front (which uses @polkadot/api-contract: 10.7.2, @polkadot/api: 10.7.2) I run this code: await ...
cris.sol's user avatar
  • 131
3 votes
1 answer
55 views

Cannot connect to PJS Apps or Substrate front-end template with a custom endpoint

I have set up a Network of two Nodes in a local Network, but I cannot get the Polkadot Block explorer (polkadot.js.org) or the substrate-Front-End-Template to connect to it. the polkadot app ...
amazing's user avatar
  • 63
0 votes
1 answer
117 views

how to fix transactionPaymentApi.queryInfo runtime call issue?

api.tx.balances.transfer(recipient, new BN(txAmount)).paymentInfo(sender) When I call paymentinfo to get a transaction fee, I got this error. Error: The transactionPaymentApi.queryInfo runtime call is ...
INcre's user avatar
  • 35
1 vote
1 answer
139 views

why the subxt can not decode metadata

Here is test demo, but always fail to run. Cargo.toml [dependencies] yew = { version = "0.20.0", features = ["csr"] } gloo = "0.8.0" wasm-bindgen-futures = "0.4.32&...
Ginmus's user avatar
  • 31
2 votes
1 answer
111 views

How to use subxt in yew.rs front-end app

Here is test demo, but always fail to run. Cargo.toml [dependencies] yew = { version = "0.20.0", features = ["csr"] } gloo = "0.8.0" wasm-bindgen-futures = "0.4.32&...
Ginmus's user avatar
  • 31
2 votes
2 answers
116 views

Decode preimages Bounded Dispatchable Call on a client side

I'm using Bounded trait from preimages frame that allows to store dispatchable calls, e.g. similar to the one that is used in pallet-democracy: pub type CallOf<T> = <T as frame_system::Config&...
Oleg Kalenik's user avatar
2 votes
2 answers
117 views

Security discussion with mnemonic in polkadot extension

Does the extension save mnemonic in the browser? If yes, is it safe?
INcre's user avatar
  • 35
1 vote
1 answer
60 views

I am trying Substrate Kitties Workshop

I am trying substrate kitties Workshop. After setting environment and paste the bare-bone code of kitties pallet , when I run cargo build --release the following error occur after 2-3 minutes when ...
user avatar
2 votes
1 answer
35 views

How to use polkadot{.js} substrate methods in itraction with kusama's gov2

Until now, to follow the referendums through the polkadot.js api, I was using storage methods that are part of the default Substrate runtime (located here: https://polkadot.js.org/docs/substrate/...
user3612's user avatar
2 votes
1 answer
5k views

Usage Error: Couldn't find the node_modules state file - running an install might help (findPackageLocation)

Prior to cloning the substrate-front-end-template repo with tag "monthly-2022-02" I installed the following since I was building it from a Dockerfile using pre-built Docker image node:...
Luke Schoen's user avatar
  • 2,322
4 votes
2 answers
251 views

How to decorate RPC correctly?

The rpc methods (showing in rpc_methods), are still not showing in their own area, after (attempting to) decorate the rpc. I have custom rpc on a substrate template. Here are the rpc_methods: I have ...
Ramsey - Decentration's user avatar
0 votes
1 answer
71 views

Add Validators to your substrate node template

I generate key pairs on my first machine and modify the customspec.json and generate customspecRaw.json and distribute my customspecRaw.json to other machines I want to add. Okay My question is that ...
user avatar
2 votes
1 answer
55 views

Querying StorageMap by Id

Having storage like #[pallet::storage] #[pallet::getter(fn account_assets)] pub type AccountAssets<T: Config> = StorageMap< _, Twox64Concat, T::AccountId, OwnedAssets<T>, ...
Łukasz Izmajłowicz's user avatar
0 votes
1 answer
44 views

connect custom frontend to my local substrate

I Created custome pallet with substrate in my local system . I gonna to connect my custome front-end ( Angular ) to my local substrate . i tryied to do it in angular with these codes : import { ...
Kianoush Dortaj's user avatar
0 votes
2 answers
106 views

How to remove account using polkadotjs? What function should I call to forget an account?

I added a new account using this command in PolkadotJS. const { pair, json } = keyring.addUri(mnemonic, 'myStr0ngP@ssworD', { name: 'mnemonic acc' }); And now, I want to forget the account. I used ...
INcre's user avatar
  • 35
0 votes
0 answers
34 views

Is there a way to create a peer to peer network on top of substrate?

Most of substrate tutorials are based on on-chain logic so there's not much information on this topic. Is there a way to use Substrate's in-built p2p network for other purposes such as constant ...
Kofi's user avatar
  • 141
1 vote
3 answers
335 views

Docker container...-p 9944:9944 running Node Template not working on polkadot js apps

I'm trying to run a substrate node through docker container but i am not able to with this command: docker run -p 9944:9944 -p 30333:30333 -p 9933:9933 -p 9615:9615 docker.io/decentration/supersig-...
Ramsey - Decentration's user avatar
1 vote
1 answer
49 views

Display type alias for primitive types

I have observed few pallets have type alias for primitive types for chain state. For eg- Grandpa pallet has one storage setIdSession which shows type as SetId even though its primitive type is u64. ...
Siddharth Teli's user avatar
0 votes
1 answer
57 views

Is there a way to allow temporary negative balances?

I would like to do two things; On wallet generation, I would like to flag whether the wallet owner is corporate or consumer, AND If corporate, allow balances to temporarily (~month) be negative Very ...
kenta_desu's user avatar
1 vote
1 answer
175 views

Integrate @polkadot/api with Vuexy React Template

I try to use PolkadotJs with my website create with Vuexy React but i have this error: ./node_modules/@polkadot/api/packageInfo.js 6:14 Module parse failed: Unexpected token (6:14) File was processed ...
FedeC87p's user avatar
4 votes
3 answers
824 views

How can I get all items in a storage map?

How can I get all items in a storage map? In polkadot-js, can we choose a storage map and give no id and its return all items? How can I do it like that?
marethyu's user avatar
  • 207
3 votes
1 answer
67 views

How can I send a transaction with vector of tuple from frontend (react)?

How can I send a transaction with a vector of tuples like Option<Vec<(T::AccountId, u8)>> from frontend (react)? What about None and other types js don't have? Is there any site I can look ...
marethyu's user avatar
  • 207
1 vote
1 answer
270 views

Error Connecting to Substrate Connection to websocket 'ws://127.0.0.1:9944/' failed

When running the tutorial for substrate-frontend-template in Chrome/macOS, it doesn't load due to a websocket error. The tutorial says to use "yarn start" which invokes: "react-app-...
R OMS's user avatar
  • 123
0 votes
1 answer
115 views

"system:ExtrinsicFailed" error when submitting transactions

I'm trying to call the setName method of nicks pallet: However, when I run click "Signed" I get the error on the right, which is: system:ExtrinsicFailed [{"Module":{"index&...
Darian Foulds's user avatar
1 vote
1 answer
61 views

Create claim not working in "Proof of Existence" tutorial

I'm at the very last stage of this tutorial to make a custom pallet and have tried running Substrate frontend template in my browser. I'm using this code for TemplateModule.js, but when I try to ...
Darian Foulds's user avatar
1 vote
0 answers
29 views

Add custom type to the substrate-front-end-template

is it a new approach to add the custom types to the substrate-front-end-template ? the ones I found in past examples of Kitties seem don't work any more. I try adding them to the PolkadotJS and to the ...
M M's user avatar
  • 11
0 votes
1 answer
204 views

Start the front-end template : error:0308010C:digital envelope routines::unsupported

OS : centos stream 9 Rust : 1.61 substrate : 2022-05 3.0 polkdadot : 0.9.20 substrate-front-end : 2022-02 nvm node nodejs : 16.14.0 success : Start the local Substrate node when i Start the front-...
565.ee's user avatar
  • 53
1 vote
1 answer
37 views

Recurring Proposal on Substrate Frontend

So from polkadot js (UI) while creating treasury proposal and want to make it recurring per cycle, you do you achieve that? Say set the segment input in the picture attached to any positive integer, ...
anonymous.ether's user avatar
5 votes
1 answer
130 views

How to upload contract using a custom made frontend?

I am making a new UI for substrate based blockchain, and found the code here to upload a Smart Contract. The code allows you to either upload metadata.json && cont.wasm files or a cont....
Divyam Garg's user avatar
1 vote
1 answer
71 views

Extending front-end-template with custom RPC

My chain currently has a couple of custom RPC interfaces that I'd like to interact with using substrates front-end-template. I'm aware that the src/config/common.json file requires modification, which ...
Mathis Wellmann's user avatar
1 vote
1 answer
90 views

substrate-front-end-template, yarn install failure [closed]

tom@tompc:~/Downloads/substrate-front-end-template$ yarn install 00h00m00s 0/0: : ERROR: [Errno 2] No such file or directory: 'install' Distributor ID: Ubuntu Description: Ubuntu 22.04 LTS Release: ...
lynkongfong's user avatar
2 votes
1 answer
125 views

How to write a custom query for storage?

When you declare a storage say pub type Something<T> = StorageValue<_, u32>; We get query function "something". But I want to write some specific functions that reads storage ...
Amiya Behera's user avatar
2 votes
1 answer
89 views

substrate-frontend-template and polkadot-js incompatibility

Tests are not working in substrate-frontend-template. Use template: https://github.com/substrate-developer-hub/substrate-front-end-template Uncomment tests in substrate-front-end/src/tests/App.js ...
Denis Reshetov's user avatar
8 votes
3 answers
73 views

How can a Dapp know if the node produces blocks automatically or not?

The substrate-contracts-node changed consensus to manual-seal starting v0.11.0, and now produces blocks only when a transaction is submitted. Because we were relying on the block 1 hash for some logic,...
Andreea Eftene's user avatar