All Questions
Tagged with transactions signed-extensions
12 questions
10
votes
2
answers
696
views
What are the Steps for Encoding an Extrinsic in Substrate?
Substrate introduces some unique concepts such as unsigned transactions and signed extensions. What are the steps for encoding an extrinsic in Substrate? What are the specific details that relate to ...
- 650
3
votes
1
answer
102
views
How to create custom origin that executes abritrary code on transactions
How can I create a custom origin that executes some arbitrary logic on any transaction? The use case here is some identity check that fails a transaction, if the check fails.
In addition, I want to ...
- 566
2
votes
2
answers
188
views
feeless transactions unsigned vs signed extension
I also notice that implementing feeless transaction are recommended on stack-exchange using an unsigned transactions.
Why is it better to implement feeless transactions with an unsigned transaction ...
- 788
2
votes
1
answer
67
views
How does the `TaggedTransactionQueue` runtime API know what parts of the encoded call to check?
The transaction pool regularly calls the validate_unsigned function of the SignedExtension trait to check transaction validity against current state. This trait then gets used to implement custom ...
- 2,650
1
vote
1
answer
208
views
Pre-dispatch Error
I took a look at the check-weight SignedExtention to see what happens when a block is full. It appears that it returns an error InvalidTransaction::ExhaustsResources. It think it puts it back into the ...
- 788
1
vote
1
answer
153
views
Unsigned Transactions vs Signed Extensions
It seems that I can use a signed extension anywhere I can use an unsigned transaction.
Can you please explain why I would implement one over the other?
How does the transaction lifecycle differ?
The ...
- 788
1
vote
1
answer
63
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 ...
- 788
1
vote
1
answer
103
views
Signed Extensions AdditionalSigned associated type
When reading about Signed Extensions in the transaction-format post it states that AdditionalSigned can be used to
to handle any additional data to go into the signed payload. This makes it possible ...
- 788
1
vote
1
answer
120
views
Transaction pool and Signed Extension Pre dispatch
My understanding is that when a transaction arrives it gets validated against all signed extensions. If the transaction is valid it then moves into the ready queue or future queue depending on the ...
- 788
0
votes
1
answer
120
views
0
votes
2
answers
94
views
SignedExtension Transaction Pool Deduplication
How do I remove duplications of transactions from the transaction pool? I noticed some return a tag in a signed SignedExtension TransactionValidity provides field. However, it is not clear to me how ...
- 788
0
votes
2
answers
120
views
what happens if I leave out ensure_signed from extrinsic?
What are the attack vectors of leaving out ensured_signed in
one of my extrinsic?
It seems that SignedExtensions already checks if the transactions are signed. When I try to submit an unsigned ...
- 788