Questions tagged [smart-contract]
Everything smart contract related, either WASM or EVM based.
24 questions from the last 365 days
1
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0
answers
8
views
OpenBrush and RMRK-Ink updates? [closed]
I had been looking around for tools to aid my ink! smart contract development. I had found OpenBrush from BrushFam and RMRK-ink to be a great resources.But seem like they haven't got any updates since ...
- 21
1
vote
1
answer
17
views
Security when instantiate Smart Contract
i am new to smart contract development and i decide to use Ink as a way to learn more about blockchain and Dapps. I was curious about what if an unauthorized actor could instantiate a new instance of ...
- 21
0
votes
1
answer
20
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Call read only ink contract functions from subxt
How do i do something like
cargo contract call --contract --message get --suri //Alice
in subxt or from a rust backend
the docs in subxt focus mostly on signing and submitting txs and events hence ...
0
votes
0
answers
16
views
Help with indexing smart contract events
Was having a hard time with subxt and indexing smart contract events hence asking for help
I want to look for an event on a specific smart contract i deployed
can someone help provide some existing ...
2
votes
1
answer
21
views
How to properly send a bare_call from a pallet to a smart contract
I'm trying to make a pallet -> contract call, using the bare_call function.
pub fn call_smart_contract(
origin: OriginFor<T>,
dest: T::AccountId,
mut ...
0
votes
0
answers
12
views
Getting this error on deploying evm smart contracts "gas required exceeds allowance 0"
I've integrated frontier evm-v1.11.0 into both L1 substrate and L0 rococo chains. While account-to-account transfers work smoothly, I'm encountering an issue when trying to deploy a smart contract via ...
- 847
0
votes
0
answers
19
views
How to Use sin() and cos() in ink! Smart Contracts?
I'm working on a smart contract using the ink! framework for Polkadot, and I need to perform some trigonometric calculations, specifically using the sin() and cos() functions. Since ink! is based on ...
0
votes
0
answers
17
views
Getting Wrong ABI for the openbrush contracts
openbrush Library
when I am building the openbrush examples i am getting wrong ABI for the input of all the functions that are in the libraray.
Can anyone tell why it is happening.
e.g.
This is in ...
0
votes
1
answer
20
views
Creation of a smart contract in contracts pallet
I need to create a smart contract using contracts pallet. I look at the source code of the contracts pallet and see:
pub fn upload_code(
origin: OriginFor<T>,
code: Vec<u8>,
...
- 769
0
votes
1
answer
17
views
openbrush::implementation(PSP34Ownable) not implemented!
when building I get this error:
error: custom attribute panicked |
4 | #[openbrush::implementation(PSP34, PSP34Ownable, PSP34Mintable, PSP34Enumerable, PSP34Metadata)]
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^...
0
votes
0
answers
11
views
Decimals in the psp22 contract
What is the role of decimals in the PSP22 contract ??
as by default Balance data-type will automatically take the number of decimal places that we have set in the chain, so what is the role of ...
1
vote
1
answer
66
views
error: System.ExtrinsicFailed: NoProvider when deploying smart contract
I just installed pallet-contracts on my Frontier node.
From the Polkadot js app interface, I can send transactions with tokens without problems, but if I try to deploy a new smart contract (inside ...
0
votes
1
answer
19
views
How Can I Scale Token Distribution in an INK! Custody Smart Contract Using OpenBrush?
community! I am a beginner in INK! and I am developing a custody contract using OpenBrush. This contract receives token (X) as collateral for another token (Y) contract. At regular intervals, the ...
0
votes
1
answer
39
views
How can I properly use scale::Decode to get consistent results?
I'm trying to process a result from a contract call using what's here. It works totally fine when I'm trying to get a u32 result from an ink_e2e test. E.g.
// -- Snip --
let number_of_items = client
...
- 143
0
votes
0
answers
20
views
Gas Limit is over estimated for dex contract
i've been working with the dex smart contracts. Whenever i try to use the add liquidity function of the contract ,it has been calculating the gas limit of 1.3 billion in frontier1.1.0. In frontier v1....
- 847
2
votes
1
answer
39
views
How to impl FindAuthor<H160> with Babe
I want add pallet-evm in my substrate node. and my substrate node use Babe instead of Aura. How can I Impl FindAuthor whih Babe ?
this is the example of Aura. I want to impl it with Babe
pub struct ...
- 21
0
votes
1
answer
31
views
getting CouldNotReadInput while creating cross invocation call when passing Vec<u8> as argument
This is how i am trying to invoke call.. where Bytes is Vec<u8>
let res = build_call::<DefaultEnvironment>()
.call(handler_acc_id)
.exec_input(
...
1
vote
0
answers
14
views
How To Increase Static Buffer Size in Ink 5.0 Contract
In Ink 5.0, the Static Buffer size can be increased. Does anyone know HOW to do that? This PR mentions several methods they were considering: https://github.com/paritytech/ink/pull/1869
I tried the ...
- 359
0
votes
0
answers
15
views
Tool for Automatic Generation of Contract Wrapper Code from Ink Metadata
I am currently exploring ways to streamline the process of interacting with contracts on the Pallet Contracts. One challenge I've encountered is the need to manually write wrapper code for contracts ...
0
votes
1
answer
55
views
duplicate lang item in crate `core` [closed]
Unable to build ink! smart contract
My command:
cargo contract build --release
Issue:
attempted to define built-in macro more than once
/Users/xxx/.rustup/toolchains/nightly-aarch64-apple-darwin/lib/...
- 750
2
votes
1
answer
34
views
Are web3.js & ethers.js compatible with ink! smart contracts?
I am pretty new to Substrate and wonder if we can communicate with ink! smart contracts via established libraries such as web3.js or ethers.js? Is the underlying RPC-based communication the same?
- 135
2
votes
0
answers
54
views
Deployment of contract and calling its function is taking too much fees
I have configured the transaction fees to be approximately 40. However, when deploying a smart contract on an EVM-compatible chain, the fees amount to be 2300, and when calling this function, the ...
- 847
0
votes
0
answers
12
views
How to call function with the same name but from different trait inside ink-e2e-test
Let's say I have the following impl of my Contract:
impl Contract{
#[ink(message)]
pub fn my_fun(&self);
}
impl MyTrait1 for Contract {
#[ink(message)]
pub fn my_fun(&self);
}
...
- 75
0
votes
0
answers
66
views
How to execute smart contract from offchain-worker?
Would it be possible to execute smart contract call from an offchain-worker, either using ink! or pallet-contracts?
Can someone please help me to provide the solution? is there any example?
- 568