Use this tag for questions about the Polkadot blockchain network platform. General questions about Polkadot should be asked at https://substrate.stackexchange.com
Questions tagged [polkadot]
203 questions
1
vote
1 answer
What is the use of ValueQuery in FRAME2 storage?
FRAME2 storage get defined using following syntax:
#[pallet::storage]
type SomePrivateValue = StorageValue<_, u32, ValueQuery>;
#[pallet::storage]
#[pallet::getter(fn some_primitive_value)]
pub(super) type SomePrimitiveValue = StorageValue<_,…
Amiya Behera
- 2,210
- 19
- 32
1
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2 answers
How to withdraw rewards from Substrate private node?
I run 2 private nodes follow this tutorial of Substrate. When I send funds from one account to another or execute a contract function. Transactions include a fee. However, I don't know who will receive these fees and how to withdraw these rewards.
Linh Tran
- 21
- 1
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1 answer
Why the transferable to smart contract is deducted?
I uploaded and created a new smart contract. I sent 1000 units to this smart contract.
However when the contract is deployed the transferable is not equal to 1000.
And when I execute any function it also deducts the transferable.
Is there any way…
Linh Tran
- 21
- 1
1
vote
0 answers
(node:21899) UnhandledPromiseRejectionWarning
I am building a blockchain project in Substrate. I have created a pallet named carpooling and defined some dispatch functions in the pallet. Now I want to call the dispatch function named book-ride from a polkadot js API. Can anyone suggest to me…
Aman Verma
- 133
- 8
1
vote
2 answers
Can we run a substrate full node(where all pallets are implemented) instead of starting with substrate-node-template?
Can we run a substrate full node(where all pallets are implemented) instead of starting with substrate-node-template ?
Makam Aravind
- 43
- 6
1
vote
1 answer
What is the diff b/w signed txns with no fees and unsigned txns with signed payloads?
Reading the documentation about off-chain workers in Substrate recipes, it is stated that we can generally make three types of transactions to include non-deterministic data from outside the chain into the blockchain. The three types being:
Signed…
Jdawg287
- 117
- 5
1
vote
1 answer
What is meant or being referenced by the DOLLARS, CENTS and MILLICENTS terminology in substrate?
Many substrate cryptocurrencies contain code referencing DOLLARS, CENTS and MILLICENTS, eg:
pub const UNITS: Balance = 10_000_000_000;
pub const DOLLARS: Balance = UNITS; // 10_000_000_000
pub const CENTS: Balance = DOLLARS / 100; …
grenade
- 31,451
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- 97
- 126
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2 answers
web3.js client library for PolkaDot
web3.js is 1 of 2 client libraries for connecting to Ethereum-compatible blockchain.
https://github.com/ChainSafe/web3.js.
(Other is ether.js)
The author ChainSafe https://chainsafe.io/ says:
The only blockchain R&D firm with a multi-chain…
Paul Verest
- 60,022
- 51
- 208
- 332
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1 answer
How to get the account data of all accounts in Polkadot using py-substrate-interface
I want to do a couple of things. First, get the data of all the accounts to do a wealth distribution analysis. Second, get the data of all the accounts who have attached identity information.
I am able to do basic stuff using py-substrate-interface…
Suryansh Singh
- 67
- 5
1
vote
0 answers
Polkadot node --dev mode speed up block creation
I am running the Polkadot node in --dev mode for the purpose of running some automated tests of a system that moves DOT between different accounts and check balances. The logic of the system considers a transaction to be "confirmed" when 3 more…
messyshed
- 11
- 1
1
vote
1 answer
Genesus Config - Substrate node template - no account balances
I am learning substrate and just upgraded to the latest version 3.0.
I have a fresh instance of the Substrate node template - using Substrate 3.0 and Frame 2.0 from GitHub.
I have built the library
I am starting the node template…
GloryDev
- 670
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- 8
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0 answers
How to integrate a 3rd party consensus pallet library compiled to WASM into substrate
I was playing around Substrate and I was wondering whether it is possible to integrate a 3rd party consensus library which I have compiled to WASM (Web Assembly) as a Pallet in substrate. I know it is possible to integrate smart contracts already…
Aurijoy Majumdar
- 11
- 1
1
vote
1 answer
polkadot.js: Unable to create Enum
types.json:
{
"WorkerId": {
"_enum": {
"Single": "Single",
"Double": "Double"
}
},
"Single": "u8",
"Double": "(u8, u8)",
}
substrate code:
#[pallet::storage]
#[pallet::getter(fn worker_infos)]
pub type WorkerInfos
dev-for-fun
- 35
- 6
1
vote
0 answers
How to convert AccountId to Vec or vice versa
I have a function which takes in T::AccountId type
Citizen get(fn candidate_name): map hasher(blake2_128_concat) T::AccountId => Option>;
e.g.
fn add_count(origin, account:T::AccountId, phrase: Vec) {
// I need to…
Amiya Behera
- 2,210
- 19
- 32
1
vote
1 answer
Substrate - finalized is zero
2021-04-11 00:57:24 ✨ Imported #21 (0x5294…9b0d)
2021-04-11 00:57:25 Idle (0 peers), best: #21 (0x5294…9b0d), finalized #0 (0xd6bc…1466), ⬇ 0 ⬆ 0
2021-04-11 00:57:30 Starting consensus session on top of parent…
dev-for-fun
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