Questions tagged [smart-contract]
Everything smart contract related, either WASM or EVM based.
38
questions with no upvoted or accepted answers
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views
I want to use Parity SCALE codec in Solidity? Is there any implementation of scale codec to decode bytes?
I want to decode bytes on the Solidity side that was decoded with scale codec.
Is the any implementation of scale codec (decode) on the Solidity side?
- 539
4
votes
0
answers
36
views
Is there a way to instantiate a contract from code_hash without ContractRef
From the documentation, we have 2 ways of instantiating a contract from a code_hash, but both require a ContractRef.
In order to obtain ContractRef we have to import the contract crate as a dependency ...
- 76
3
votes
1
answer
65
views
Can we define ink_e2e tests outside of contracts module?
devs. I am writing the e2e tests for my smart contracts using ink_e2e
In contracts, I define the e2e-tests like this.
#[openbrush::contract]
pub mod controller {
...
#[cfg(all(test, ...
- 61
3
votes
1
answer
82
views
Build the data bytes to query a contract with the api state_call
I would like to use the rpc call to query a contract.
I try to use the method "call" from the endpoint "state" with the first parameter "ContractsApi_call" but I am not ...
- 31
3
votes
0
answers
33
views
How can I use complex structure in ink! version3
how can i use the complex structure(like Mapping<String, Vec<Map<String, String>>>) in ink!
#![cfg_attr(not(feature = "std"), no_std)]
use ink_lang as ink;
#[ink::...
- 31
3
votes
0
answers
31
views
How to migrate / backup & restore ink smart contract storage?
Is there a way to backup ink smart contract storage and later restore on another chain? Lets say we have chain with 3 validators and deployed smart contract containing certain information in its ...
- 83
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 ...
- 815
2
votes
0
answers
17
views
How can I mint new token from ink smart contract calling pallet-balances function?
How can I mint a new native token (not a custom token) from the ink smart contract calling one of the functions from pallet-balances pallet?
- 341
2
votes
1
answer
32
views
How to Modify static buffer size for my ink smart contract to Resolving 'OutputBufferTooSmall' Error for Larger Vectors in ink smart contract
I'm facing an 'OutputBufferTooSmall' error in my [Language/Framework] code when working with larger vectors. I suspect this is related to the maximum allowed input/output sizes. I need guidance on how ...
- 477
2
votes
0
answers
51
views
How to upload the same ink! smart contract to a different code hash?
I've written this ink! quickstart script that I can repeatedly call to run these steps to flood my local testnet with instances of Flipper contracts:
Kills an existing substrate-contracts-node ...
- 2,346
2
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0
answers
35
views
Error Type { registry: TypeRegistry {}, initialU8aLength: 6 } when try to query ink! smart contract by @polkadotjs/api-contract
My code:
const main = async() => {
//Get wasm
// This file wasm I already build through "cargo contract build"
let wasm = fs.readFileSync("../../res/incrementer.wasm&...
- 718
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
1
vote
0
answers
13
views
What happens to smart contracts when breaking changes are introduced to ink?
I've seen breaking changes mentioned in this issue for upgrading set_code_hash.
This got me thinking, what happens to existing contracts when a breaking change to ink is introduced?
For example, we're ...
- 579
1
vote
0
answers
22
views
"ContractTrapped" Error even with successful cross-contract call
let result_call = ink::env::call::build_call::<Environment>()
.call(self.escrow_address)
.gas_limit(0)
.transferred_value(0)
...
- 11
1
vote
0
answers
44
views
What could be the reason for my contract throwing "ContractTrapped"? Other cross contract calls are successful, but not in this code
The force_vote function in voting contract places a call to a different contract easily, but when I want to get some data from the other contract as well, it fails. Similarly in the function where the ...
- 31
1
vote
0
answers
21
views
error build_call
#[ink(message)]
pub fn get_flip2_buill_call(&mut self, token_contract_address: AccountId, account_id: AccountId )-> i32 {
let my_return_value = build_call::<DefaultEnvironment>()
...
- 23
1
vote
0
answers
28
views
How to curl `ink!` contract storage?
I'm trying to use curl to query an ink contract's storage using the RPC of substrate. I've looked at the below question
How do I call the RPC method `contractInfoOf` using curl?
but it does not ...
- 579
1
vote
1
answer
27
views
I'm trying to access another contract's struct X in my contract. It is throwing error: panicked at 'Cross-contract call failed with Decode(Error)'
#![cfg_attr(not(feature = "std"), no_std, no_main)]
#[ink::contract]
mod arm {
use ink::prelude::vec::Vec;
#[derive(scale::Decode, scale::Encode)]
#[cfg_attr(
feature = ...
- 31
1
vote
0
answers
25
views
How to resolve "mismatched types" error while ink_e2e test : expected String, found Vec<u8>
I am working with ink_e2e testing framework in ink smart contract, and I have encountered an error message that's a bit confusing. The error says: mismatched types - expected String, found Vec<u8&...
- 477
0
votes
0
answers
14
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
0
answers
10
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
10
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 ...
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
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....
- 815
0
votes
1
answer
27
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(
...
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
46
views
duplicate lang item in crate `core`
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/...
- 718
0
votes
0
answers
11
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
65
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?
- 557
0
votes
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answers
24
views
contracts.ContractReverted: The contract ran to completion but decided to revert its storage changes. Ink nft smart contract
I am trying to call the set_base_uri function and the mint_next function of the ink! NFT smart contract. When calling from polkadot-ui it is working correctly but when I call it using nextjs it gives ...
0
votes
1
answer
78
views
How to do cross contract e2e tests on ink?
I have made a contract in ink! that build fine, and I am trying to make e2e tests. I don't manage to do this even by using the examples in ink! repertory.
My contract is a swap contract: it takes the ...
0
votes
0
answers
15
views
How to test smart contract timestamp dependent behavior?
how can I test block_timestamp-dependent smart contract behavior?
The substrate contact node doesn't allow block_timestamp manipulations.
For context, in the EVM ecosystem, one can use hardhat helpers ...
- 75
0
votes
0
answers
24
views
Encountering Error "Encountered Unknown Ink! attribute argument: path" in Ink! Smart Contract
I am working on an Ink! smart contract in Rust, and I've encountered an error that I'm having trouble resolving. I followed a solution from a source [provide link here if applicable], but the problem ...
- 477
0
votes
0
answers
19
views
Could not decode `ContractInfo::storage_item_deposit
When I am doing runtime-upgrade from polkadot-v0.9.38 to polkadot-v0.9.39 .I am getting one issue of smart contract in my terminal
2023-09-18 11:36:25 Corrupted state at `[67, 66, 25, 62, 73, 111, ...
- 815
0
votes
0
answers
25
views
Selling token to any third party tools
When user stake his NFT, then he earns certain amount of $EGGS token which is in-game currency. He can to sell those token to third party tools. How to implement selling token to any third party tools ...
- 1,253
0
votes
0
answers
69
views
How to wrap an ink::env::Error in a Custom Error?
In my contract, I have a requirement to call messages from external contracts without knowing their specific identities beforehand. To achieve this, I utilize the call builder, enabling the execution ...
0
votes
1
answer
58
views
How to deploy a contract on your chain
Hi i have cloned the node-template and also added the pallet-contract in it, now i want to know that how can i deploy a smart contract on my chain i have also deployed it on EC2 instance but i want to ...
- 169