Questions tagged [openbrush]
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26
questions
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Is there a library similar to ERC-165, In OpenBrush or Ink smart contracts, used to identify the implemented interfaces of a smart contract?
"I'm working on developing smart contracts using OpenBrush and the Ink programming language, and I'm in need of a mechanism to detect and identify the interfaces that a particular smart contract ...
- 442
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0
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39
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How to write upgradable smart contracts in rust (changing the storage)?
I am writing a smart contract in Rust using the Openbrush library. I am using version 3.0.0.
pub const STORAGE_KEY: u32 = openbrush::storage_unique_key!(metaData);
#[openbrush::upgradeable_storage(...
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3
answers
58
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How to call PSP22::approve function from Frontend
Any guidance on how to call my psp22 approve function from the front end ? This is currently how I'm doing it but it doesn't seem to give increased allowance (although its successful) :
import { ...
- 119
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1
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59
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How to mint multiple characters randomly?
Let me give scenario, let's say:
There are 2 types of playable characters
Chickens (90% chance to mint)
Foxes (10% chance to mint)
and total supply is 15,000 units :
13,500 chickens
1,500 foxes
...
- 1,208
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27
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"TooManyTopics" Dispatch Error and Contract Revert when Minting in OpenBrush PSP37 Smart Contract
I am facing an issue with the OpenBrush PSP37 smart contract while calling the mint function. I receive a Contract Reverted! error with a TooManyTopics dispatch error. However, upon inspecting the ...
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62
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Getting "Contract Reverted!" error with "TooManyTopics" dispatch error when calling mint function in OpenBrush PSP37 smart contract
I'm working on adding events to an OpenBrush PSP37 smart contract and deploying it using Substrate Contract UI. However, when I try to call the mint function, I encounter the following error:
Contract ...
- 442
2
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2
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652
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What is the purpose of installing cargo-contract and using it to create Ink! Rust smart contracts?
What's the deal with installing cargo-contract to make Ink! Rust smart contracts? Is it the contract compiler, or is it ructc? Why do we even need it?
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2
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179
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Specialization impl does not specialize any associated items
I'm fairly new to Rust and ink! itself.
I'm trying to compile and build an extremely basic PSP22 Contract.
I get the following error when I compile & build:
(running cargo +nightly contract build)
...
- 119
1
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1
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67
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Explain components of Mapping used by Openbrush. Mainly placeholders for the actual type used in the code. Like ApprovalsKey used in bellow example
I am trying to understand the working of upgradeble storage used by openbrush libraries.
I am unable to understand Mapping used in impls of psp34 trait eg
pub operator_approvals: Mapping<(Owner,...
- 442
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45
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Why we use empty struct named as key of particular lib name in mapping while using it in storage of openbrush libraries
When you go through the openbrush smart contract library. You will notice they are using upgradeable smart contract storage and while defining storage they are using some empty struct as key of ...
- 442
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1
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39
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Missing trait items: `__ink_TraitInfo`, `pausedOutput`
I copied the pausable ink example and am running into the following error (here is the repo/diamond-pattern branch):
error[E0046]: not all trait items implemented, missing: `__ink_TraitInfo`, `...
- 605
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2
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237
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Do ink compiler automatically generate getter function for state variable ( if declared as public ) like solidity language?
In the case of solidity language -
In smart contracts, state variables can be made public to allow for easy access and visibility of the data stored in the contract. When a state variable is declared ...
- 442
2
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1
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71
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PSP34 Get Attribute Null Value
I Already write code with openbrush.io and set Attribute on constructor here my code :
#![cfg_attr(not(feature = "std"), no_std)]
#![feature(min_specialization)]
#[openbrush::...
- 43
1
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3
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113
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Unable to deploy the open-brush contracts build using toolchain nightly-2023-02-07 on substrate node
As you can see in following link . I was not able to build contract using latest rust nighly ( rustc 1.70.0-nightly (17c116721 2023-03-29)) toolchain.
ERROR: Loading of original wasm failed
I got the ...
- 442
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1
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54
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What is the significance of default in open brush contracts traits implementation?
I was going through the code of open brush implementation for different tokens, and was confused at a point in PSP22 contract where there is a word written default, as shown below
default fn ...
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35
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Can I make a cross-contract call with constructor (function with "#[ink(constuctor)]" attribute) in ink! contract?
I've been trying to implement cross contract calls in constrcutor but somehow I can't seem to make it right. Is the following code executable?
#[openbrush::contract]
pub mod contract {
#[ink(storage)...
3
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1
answer
89
views
ContractTrapped, transfer_from CalleeTrapped
DispatchError: ContractTrapped
DispatchError docs: Contract trapped during execution.
Debug message:
panicked at 'encountered error while calling <AccountId as PSP22>::transfer_from: ...
2
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4
answers
97
views
ink-e2e: Metadata artifacts not generated when importing crate
Context:
I am trying to detach end-to-end tests from my main contract lib.rs. I created a new module in tests_e2e.rs.
I import the module in main contract like so:
lib.rs...vvv
#[cfg(all(test, feature ...
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1
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52
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Difference between {Contract}Ref and Hash?
while contract instantiation inside constructor new function parameter, we can find {Contract}Ref and Hash. If new function accepts {Contract}Ref
as parameter, then type is AccountId
and if new ...
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2
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154
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Traits with "#[openbrush::trait_definition]" cannot be referenced
I want to implement a base contract that multiple contracts should implement.
I decided to use "#[openbrush::trait_definition]" because "[#ink(message)]" cannot be added in the ...
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1
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1
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85
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What is new way to implement custom data structs (in ink! 4)?
I am trying to upgrade then compile a token contract (employing openbrush) from ink!3 to ink!4.
My understanding is that SpreadAllocate, StorageLayout, etc. have been removed from the ink!4 release.
...
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2
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118
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PSP22 cross-contract call to get metadata such as token decimals and token name using ink!
I have a little problem here.
I have the address of a contract (PSP22 token) with the {}Ref associated with it.
I want to make a cross-contract call to get the decimals of the contract.
Its Ref is use ...
3
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1
answer
72
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Best practices for handling my own errors and openbrush's errors?
I am using ink! to implement the contract.
I have implemented my own error, and the contract function has this own error as a return value.
For example, suppose that function implements openbrush's ...
- 349
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73
views
What is the 'wasm' argument in CodePromise?
I'm building an application that allows anyone to deploy PSP34 using Openbrush contract.
I want to allow users to deploy a new contract from the UI and upload an image to mint the NFT.
I have ...
- 83
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77
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PSP34Mintable::mint() as payable function
I'm using PSP34 from openbrush in ink! contract and want to override mint() function that comes with PSP34Mintable trait.
Since this contract should accept payments for the mint() call, a payable is ...
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1
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355
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How to implement cross contract calls correctly?
I've been trying for a few days now to implement cross contract calls but somehow I can't seem to make it right. So here is my code and I hope one of you can point out my mistake to me.
I want to call ...
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