In relation to the Stacks blockchain platform.
Stacks is a blockchain linked to Bitcoin by its consensus mechanism that spans the two chains, called Proof of Transfer.
Questions tagged [stacks-blockchain]
23 questions
1
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1 answer
Public function smart contract Clarity Stacks
I am writing a public function that only owner of the contract can call.
It is a funciton that changes a state variable in a smart conract.
(define-public (changeRatio (newRatio uint))
(begin
(asserts! (is-eq tx-sender (var-get…
Brian
- 11
- 1
1
vote
1 answer
Clarity conversion string to uint
I want to concatenate a string with an uint. Found the best method is to have two strings and concatenate them.
How can any uint be converted to a string?
Deployer
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1
vote
0 answers
How to set up an environment to write/test Clarity smart contracts within a Django project
I'm setting up a web project that can (i) interact with the Stacks blockchain and (ii) deploy/interact with Clarity smart contracts.
I need help in configuring the environment correctly. Following is how I typically setup web projects.
I typically…
Hassan Baig
- 15,055
- 27
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- 205
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1 answer
How to join two utf8 strings together in Clarity?
In my Clarity smart contract, I am trying to to append one string ("Hello") to another string (" to Clarity Language"). Both strings are of type string-utf8.
Deploying the contract below fails with an error: expecting expression of type…
friedger
- 645
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0
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1 answer
Unit Test Clarity Language
I have a question on about Unit Test
While I putting some code on Tx.contractCall in the .ts file, what types should I choose if I want to put contract name?
Tx.contractCall(
""dex"",
""provide-liquidity"",
…
0
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1 answer
Fold or map function & pass in list as parameter Clarity Smart contracts
I have a question regarding the fold or map function and how they can be used. This, as well as passing in a list.
how can the fold or map function be used to run another function more then once?
How can i pass in a list as a parameter to a…
0
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1 answer
Question regarding this notice in Clarity extension
Question regarding this notice in Clarity extension v0.7.1
(define-public (lock (new-beneficiary principal) (unlock-at uint) (amount uint))
Returns:
'source of untrusted input here'
(var-set beneficiary (some new-beneficiary))
Returns:
'use of…
Brian
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- 1
0
votes
1 answer
Print current value of missing variables during manual testing - Clarity Smart Contract
Is it possible to print the current value of variables during manual testing to see how they are behaving?
I mean during manual testing in the clarinet console
or do I have to add something like (ok variable_name) at the end of the function?
Rick
- 1
0
votes
1 answer
Clarity Smart contract function loop if error
can someone help me understand why my 'get-employee-2nd...' function seems to loop if the check index u1 and returns (ok none) for other indexes.
(define-public (get-employee-2nd-club-
name-from-tuple)
(let (
…
Brian
- 11
- 1
0
votes
1 answer
Where can I find a list of all operations possible on lists and maps for Clarity Smart Contracts?
Is there a resource for Clarity Smart contracts on Stacks that contains all operations possible on lists and maps?
for instance for lists, I see in the book that you can append but can you also remove elements?
I am not sure whether this is also…
Rick
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1 answer
Clarity Smart contract validate principal calling public function
When writing a Clarity Smart contract, how can you validate the principal that is calling into a public function.
I don't know where to find the answer to this question.
0
votes
1 answer
Define Non Fungible Token - Stacks Clarity Smart Contract
Question, the two functions "define-non-fungible-token" and "define-trait" are unrelated... right? The function "define-non-fungible-token" is used to create an NFT. While the function "define-trait" is used so that another contract can utilize that…
Brian
- 11
- 1
0
votes
1 answer
Define functions expression - Clarity Smart contract Stacks
The expressions that define functions take one expression for the function body.
[The function body is what is executed when the function is called.]
If the body is limited to one expression only, then how can you create more complex functions that…
0
votes
1 answer
Running Clarity Smart Contracts u0 u1 u2 function
If I run the following:
(define-data-var even-values uint u0)
(define-public (count-even (number uint))
(begin
;; increment the "event-values" variable by one.
(var-set even-values (+ (var-get even-values) u1))
;; check if the input…
Brian
- 11
- 1
0
votes
1 answer
Start new project, time-locked wallet - Clarity Smart Contracts for Stacks
Going thru the Clarity Code track. When creating a new Project, as you see the time-locked wallet, it didn't create it's own new project column, it went under Counter, the previous project.
resulting in timelocked-wallet.clar falling under Counter…
Brian
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