Questions tagged [transactions]
Questions about transactions, including signed and unsigned extrinsics, transaction formats, transaction pools and constructing transactions.
131
questions
0
votes
1
answer
22
views
What is the use case for inherent transactions?
Just for curiosity!
In what conditions we can use Inherent transactions?
Thanks
- 1,421
0
votes
0
answers
21
views
What is the reason for this unexpected transaction ordering
My understanding is that transaction priority and therefore the ordering in the block is determined by the fee and tip paid.
I have noticed a number of times that transactions with the highest total ...
- 11
5
votes
0
answers
51
views
Is there any good way to keep an intermediate state for an operation between several transactions/blocks in a BABE/GRANDPA-based chain?
I know that the best practices suggest designing transactions (pallet calls) in a way that executes the operation atomically and doesn't keep any intermediate states. This guarantees, that in case a ...
- 155
1
vote
1
answer
111
views
How to calculate TPS for a substrate based chain?
Let's say we have a 2 node network with PoA as consensus. In that case how to calculate TPS of this chain specifically?
- 759
1
vote
1
answer
52
views
List all balance changes of an account on a Substrate-based chain
My goal is to list all balance changes for an account on a Substrate-based chain like Acala.
I assumed that on Substrate-based chains all incoming and outgoing values to and from an account would be ...
- 11
0
votes
0
answers
25
views
How can one design and implement a fee rule?
I hope you are doing well!
How can one design and implement a fee rule on a substrate-based blockchain that is contingent on the transaction payment value?
I would like to create this fee rule based ...
3
votes
1
answer
59
views
Get the raw hex from substrate
I'm trying to get the raw value of the transaction without using the websocket.
For now I'm using a WebSocket for my application and I am in the process of removing it, I could find everything I ...
- 31
0
votes
1
answer
19
views
westend network try to send transfer transaction but fail
my westend account is 5G7NsFf3MqwEKSbuo52d2Y9RaaiMQ3akXzSWpSvgUYq3ZEsm.
it shows I have 0.02 WND, and I try to use Balances.transfer or transfer_allow_death 0.0035 WND to another account.
So I send ...
0
votes
0
answers
16
views
batchall.sign throws TypeError: Cannot read properties of undefined (reading 'specVersion')
Trying to form a batchAll command that carries out 2 activities:
Deposit 1 GLMR from wallet1 to wallet2
Cancel tokens' delegation revoke
When I try to sign the batch with wallet1 (batchAllExtrinsic....
- 1
1
vote
2
answers
38
views
Sending native token in loop not running
Please explain why the following occurs
When this method is called, the tokens are equally divided and distributed to the user. (as expected)
All user balances get updated with the new amounts.
#[ink(...
- 119
3
votes
0
answers
29
views
ink dapp asking to sign transactions everytime i reload
so i am building a dapp with ink
it has messages to get data and put data
and on FE when i logged in with the polkadot-js extension wallet
everytime i reload the page it asks me to sign the ...
- 133
0
votes
0
answers
14
views
Unit testing an extrinsic submitted by an Offchain Worker?
As far as I could understand so far there is no a "normal" way to test extrinsics submitted by an Offchain Worker, rather a substitute transaction pool is involved.
However it is possible to ...
- 181
3
votes
1
answer
55
views
Transaction lifecycle substrate, Polkadot
I'm learning about transaction lifecycle in substrate docs, I saw the diagram but I don't understand the flow operation of this diagram. Please, let's explain the flow operation of the transaction ...
- 113
5
votes
1
answer
99
views
Era of Mortal Extrinsic - How to set `period`, `phase` and `current` arguments
I am trying to define the Era of a mortal transaction in two ways :
Manually
Meaning I am not using the mortal function and I have to input the correct values for Periodand Phase myself which are the ...
- 1,633
3
votes
1
answer
71
views
Problem deploying smart contract on rococo
I have been following the public documentation of polkadot API to deploy contract: https://polkadot.js.org/docs/api-contract/start/code
but I'm getting error Uncaught (in promise) TypeError: code.tx....
- 61
2
votes
1
answer
58
views
AccountId in offchain worker
I'm working on Substrate based project. In the project, each blockchain validator has an offchain worker. author_insertKey() is used to set up a key so the offchain worker can sign transactions. Each ...
2
votes
1
answer
39
views
Are Transaction Pool and Transaction Queue the same thing?
Was going through documentation of Substrate. I came across transaction lifecycle. https://docs.substrate.io/learn/transaction-lifecycle/
I'm confused about one line it which says
"The ...
- 317
3
votes
2
answers
57
views
Simulate transaction before sending
So lets say I have an unsigned transaction. Is there any way I can simulate the transaction without actually sending it to the chain to see if the transaction will fail or if it will be succesfull? ...
- 205
4
votes
1
answer
54
views
Are on_idle hooks transactional?
Trying to call a function marked as #[require_transactional] from on_idle() hook triggers the error Err : Transactional(NoLayer).
I realise the transactional macro is optional for extrinsics and the ...
- 43
6
votes
2
answers
62
views
Efficiently limit NFT transfers to members of a group
What is/are the preferred approach/es (crates, pallets, etc.) to efficiently limiting NFT transfers to members of a group?
Here efficiently refers to the resources consumed to execute the transfer.
...
4
votes
1
answer
236
views
Sign a transaction offline for Westend testnet and verification of the transaction
Could Polkadot experts execute the code below and advise me on the questions, please?
You just need to replace the code by your own Westend accounts and nonce.
import { construct, getRegistry, ...
- 71
1
vote
1
answer
36
views
How to disable "tips" with Aura?
How can transaction tips be disabled or configured (say, limited) with Aura consensus?
- 213
3
votes
1
answer
158
views
How to make rawTransaction? and Can I get some guide or reference about offchain sign?
[Question]
How can I make raw-transaction(unsigned-transaction) with essential parameter(fromAddress, toAddress, value, nonce, fee etc)? I want to know low-level algorithm.
What kind of Cryptography ...
- 43
0
votes
0
answers
25
views
A question about the dot browser display
Will all types of transactions for which the user receives a dot amount be displayed on this browser page https://polkadot.subscan.io/account/*? Are there any transaction types that are not displayed, ...
- 305
1
vote
1
answer
95
views
Creating offline transaction for parachains
From my research of how to generate and sign transactions offline I found docs:
https://wiki.polkadot.network/docs/build-transaction-construction citing txwrapper-core:
https://github.com/paritytech/...
- 205
1
vote
1
answer
88
views
How to get the payload from a polkadot-js transaction
I'm wondering what are the possible ways to extract the payload from a polkadot-js transaction.
So far the only way seems to be to define a custom signer that implements the Signer interface and then ...
- 101
4
votes
1
answer
104
views
Serialisation of Extrinsic objects
Generating transaction via ApiPromise through api.tx.xxx method generated a SubmittableExtrinsicFunction object. Which has a toJSON() function that return what I would call a raw transaction.
Is there ...
- 205
3
votes
2
answers
120
views
Is there anyway to tell if a transaction was submitted by a light client on a substrate blockchain?
Interested in calculating the number of transactions submitted by type of node. Ie seeing how many transactions are originating from light clients vs full-nodes.
- 335
0
votes
0
answers
19
views
How to apply a custom transaction fee to specific accounts for a given number of blocks?
For example, if you have built a custom Substrate-based chain and added Substrate pallets to enable on-chain governance (i.e. pallet_democracy, pallet_referenda).
How would you apply a custom ...
- 2,292
0
votes
1
answer
29
views
How to split the overall transaction fees associated with an on-chain proposal that passes amongst its creator and voters?
If you have built a custom Substrate-based chain and added Substrate pallets to enable on-chain governance (i.e. pallet_democracy, pallet_referenda).
How would you split the costs between participants ...
- 2,292
2
votes
1
answer
206
views
Best practices for generating and monitoring transactions
So I am building a service that will be creating high amount of transactions on different substrate base chains.
The infrastructure I have in mind is having microservices that will generate ...
- 205
2
votes
1
answer
70
views
How to reduce spam risk if tx fees are paid with exotic assets instead of native tokens and tx fee overpayment refunds are in native tokens?
This pull request appears to expose arbitrage and spam opportunities, as it proposes to modify the Substrate frame DEX pallet to allow users to use an exotic asset for transaction fees instead of the ...
- 2,292
2
votes
1
answer
41
views
What is the intended purpose of `sudo_as` from the sudo pallet?
I ask myself, why this extrinsic (https://github.com/paritytech/substrate/blob/e9b0facf70eeb08032cc7e83548c62f0b4a24bb1/frame/sudo/src/lib.rs#L224-L263) exists? I mean the sudo key could execute any ...
- 503
1
vote
2
answers
137
views
How To Adjust The Fees On A Running Substrate Chain?
Fees for transactions in our test net are too high and we would like to adjust them to be some factor lower across the board. Is there a simple way to do that using a call from the Polkadot.js apps ...
- 269
1
vote
1
answer
59
views
Transaction fees withdraw/deposit in
I made transactions on a simple EVM DEX contract.
I initially called the approve method which only triggered balances.withdraw event. I understand that this event is triggered as calling this write-...
- 304
1
vote
1
answer
46
views
`<Runtime as TaggedTransactionQueue<Block>>::validate_transaction()` vs `frame_system::Config::BaseCallFilter` for checking for a valid transaction
When is it appropriate to use <Runtime as TaggedTransactionQueue<Block>>::validate_transaction() to check if a transaction is valid (and reject a transaction if it is invalid) and when is ...
- 43
6
votes
1
answer
290
views
Calculating actual weights for extrinsics
I have a substrate pallet with a number of extrinsics, some simple, some more complex. Depending on the chain state and the input variables, the amount of computation and the number of DB reads for ...
- 321
1
vote
1
answer
90
views
how to transform OpaqueExtrinsic to get the variables within the transaciton?
I'm writing a custom BlockImport and I need to decode the transactions within the block,as we know a transaction is simply a pallet method call for example store_value(value), but at the point where I'...
- 1,073
1
vote
1
answer
123
views
how to replace api.rpc.payment.queryInfo in polkadotjs now that it is deprecated?
In https://github.com/polkadot-js/api/releases/tag/v9.8.2 api.rpc.payment.queryInfo is marked as deprecated but how can you build a transaction through polkadotjs without using it?
- 13
0
votes
1
answer
77
views
How to use transaction dependency tags (provides/requires)?
I could not find much information/documentation on how to use the provides/requires tags (TransactionTag) Can someone please provide an example? The tag is a vector of bytes. Should I assume these ...
- 530
1
vote
1
answer
24
views
what is the blockImport equivalent for transactions?
how do i check a transaction before it gets added to the transaction pool, kind of like BlockImport but for transactions that are coming from outside(from other validators or clients)?
- 1,073
1
vote
1
answer
38
views
Why was the same transaction executed twice?
The following 2 extrinsics :
10995944-2
10996284-2
were included in the blockchain, that shows that a transaction with exact same input parameters including the signature was executed twice. Why did ...
- 1,633
4
votes
1
answer
351
views
How the transaction payment pallet handles transaction fee of every extrinsic?
I was doing some experiments with Substrate Node Template. I found that for every extrinsic, user is charged with some fee. I explored
https://github.com/paritytech/substrate/blob/master/frame/...
- 413
1
vote
1
answer
68
views
Why does ImOnline use ValidateUnsigned over SignedExtension?
From ValidateUnsigned:
Note that any checks done here are only used for determining the
validity of the transaction for the transaction pool. During block
execution phase one need to perform the same ...
- 3,702
1
vote
1
answer
67
views
Is it possible to gossip inherents?
Inherent transactions can only be inserted into a block by the block authoring node that calls them. Typically, this type of transaction is not gossiped to other nodes or stored in the transaction ...
- 3,702
2
votes
1
answer
73
views
collect tx fees from a pallet
Is there a way to send tx fees of a pallet to an account? Like transactions fees of pallet X is send to an account. We can split the global tx fees between treasury and other but we want to do it as a ...
- 294
0
votes
2
answers
211
views
Create a signed transaction using a signature and unsigned_transaction
I have two functions.
The first function: Generates payload of unsigned_transaction:
The second function: Needs to generate a signed transaction, using unsigned_transaction and signature.
Process:
...
1
vote
1
answer
749
views
How i implement Debug for trait object [closed]
I find out 1 piece of code in substrate
pub struct IsValidator(Box<dyn Fn() -> bool + Send + Sync>);
How can I implement Debug for IsValidator Struct
- 616
1
vote
1
answer
43
views
why does pre-dispatch in SignedExtension require you to call validate?
I am trying to understand how to develop an attack vector for when the pre-dispatch function leaves out the same checks in the validate function.
Can you please help me understand what the attack ...
- 766
0
votes
1
answer
112
views