Questions tagged [smart-contract]
Everything smart contract related, either WASM or EVM based.
250
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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, ...
- 572
1
vote
1
answer
37
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Contract Trapped on Single Message
I am getting a Contract Trapped error on one specific message in my ink contract. I tried putting overflow-checks = false into the Cargo.toml. That made no difference. This is the first time I have ...
- 227
3
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0
answers
26
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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 ...
- 51
0
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0
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38
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Unable to verify WASM contract in Substrate Astar
I'm encountering difficulties while attempting to verify my WASM smart contract through Astar's Subscan tool. Despite multiple attempts using various options, the verification process remains ...
1
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1
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92
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how to call smart contract function in custom pallet?
Is there any way to call ink! smart contract function in substrate custom pallet?
We've found this answer where bare_call function is based on older version of contract_pallet.
// This ends up calling ...
- 1,148
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1
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25
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Call ink! smart contracts from hardware devices that use embedded rust
What would be the best rust crate or c++ libraries to call ink! smart contracts from hardware devices that use embedded rust?
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1
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1
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39
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Cross-Contract Calls and Events don't work (ink 4.2.1)
I have replicate this error using the MultiContractCaller from the ink-examples
In the multi_contract_caller we have a FakeEvent.
#[ink(event)]
pub struct FakeEvent {
account_id: AccountId,
}
...
- 149
3
votes
1
answer
38
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What is a Storage Deposit?
When developing ink smart contracts, I've often seen a Storage Deposit charge. What is this, and how does it relate to contract storage?
My guess is it's a charge related to the size of the contract's ...
- 519
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0
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19
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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&...
- 392
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22
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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 ...
- 1,148
0
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1
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20
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Error in deploying call_runtime contract from ink!
I am running call_runtime from ink. It builds successfully, but when trying to upload contract, It gives system.ExtrinsicFailed contracts.CodeRejected error. Someone please advice what I am doing ...
- 1,148
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1
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27
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How to write integration test cases for ink?
I am new to substrate and ink, while following ink documentation I got to the testing part and want to write integration tests. Can someone help me with it or point to the documentation or resources ...
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0
answers
24
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What happens to legacy contracts given breaking changes to cargo-contract v3?
In the cargo contract v3 release, breaking changes were made for how contracts are built (cdylib -> bin) and specifying no_main.
I've found that cargo contract v2 produces contracts compatible with ...
- 519
4
votes
1
answer
58
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rococo-contracts-rpc.polkadot.io, upgrade their nodes to the latest avaliable version
Does anyone know when the rococo-contracts-rpc.polkadot.io is going to upgrade their nodes to the latest available version ?
Error:
Ink version:
- 149
0
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1
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109
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e2e-tests "We should find a port before the reader ends"
I am doing a basic E2E test using the flipper example.
This is my contract version
I have install the substrate-contracts-node
I am running with the "nightly-2023-02-09" (cargo +nightly-...
- 149
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0
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28
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Event on factory can't be emitted
I'm working on an an ink! contract and trying to establish a factory contract to enable indexing for each deployment using a subquery subgraph. For this purpose, we emit an event whenever a successful ...
2
votes
1
answer
193
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Writing Unit Tests
I have two ink! contracts, one being a simple staking contract, and the other being an ERC20. Now, I can write unit tests for ERC20 simply in the contract file itself but to write unit tests for my ...
0
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1
answer
51
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Get contract address from instantiated ContractRef
Based on this example: https://docs.rs/ink/latest/ink/struct.EnvAccess.html#method.instantiate_contract
Im doing something similar:
#[ink(message)]
pub fn new_multisig(&mut self, threshold:...
1
vote
2
answers
93
views
Not able to upload contract in substrate node template
I have added pallet-contract in our chain. Build contract works fine and run chain in dev mode also works fine. But when I try to deploy contract it doesn't work and doesn't throw any error. Can ...
- 1,148
1
vote
1
answer
32
views
Calculate how many days
I wan't to get how long user has staked nft token in days. I recorded staking time_stamp while staking and un_staking time_stamp while un_staking. Now I wan't to calculate how many days user has ...
- 1,148
0
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1
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20
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block time_stamp return value
When using block_timestamp to return value, why it's return 1,690,534,220,344 value? Someone please explain me what is the meaning of this value?
#[ink(message)]
pub fn abc(&self) -> u64 {
...
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0
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0
answers
52
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
15
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Error upload smart contract
The pallet-contract version is 0.9.29
Error uploading new contract using Polkadot.JS
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1
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2
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77
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Reading contract value returns null
Facing an issue while trying to query for a value in my contract. The value keeps getting retuned as null with an error. However, it works fine on substrate Contracts UI
Front end Dapp :
const ...
- 119
2
votes
1
answer
52
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Generate random number ink!
I am writing ink! contract to generate random number between min and max value. I found this article. Here we can generate random number between 0 to 99. Then I modified to generate random number ...
- 1,148
0
votes
1
answer
25
views
How to implement EIP-2612 permit in rust !ink
I am trying to implement EIP-2612 permit functionality in my psp22 contract.
https://github.com/ethereum/EIPs/blob/8a34d644aacf0f9f8f00815307fd7dd5da07655f/EIPS/eip-2612.md
But not sure how to do it.
...
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2
votes
2
answers
28
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Ink Smart Contract call Error
I am deploying an ink! smart contract to a local network, but when I tried to call any function from it i have this error:
> { Err: { Module: { index: '8', error: '0x02000000' } } }
Does anyone ...
- 21
1
vote
1
answer
56
views
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
...
- 1,148
0
votes
1
answer
31
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 ...
- 109
1
vote
2
answers
37
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Sending native token in loop not running
Please explain why the following occurs
When this method is called, the tokens are equally divided and distributed to the user. (as expected)
All user balances get updated with the new amounts.
#[ink(...
- 119
3
votes
1
answer
64
views
How to "graceful terminate" a smart contract from the "rococo-contracts-rpc.polkadot.io" chain?
In theory we could use this command:
cargo contract remove --execute --code-hash '******' --url 'wss://rococo-contracts-rpc.polkadot.io' --suri 'seeds'
But in order to do that we have first to ...
- 149
0
votes
1
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25
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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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1
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49
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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 ...
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5
votes
1
answer
49
views
How do I upgrade an ink contract with storage changes?
Let's say I have a simple/contrived ink contract:
#[ink(storage)
pub struct MyContract {
a: u8,
b: u8,
}
Now let's say it's in production and a == 1 and b == 2.
I've done some work and ...
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3
votes
0
answers
54
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
177
views
Getting OutOfGas Error when trying to call smart contract
I am running tests of my !ink smart contracts using @727-ventures/typechain-polkadot module.
But when I am running tests, sometimes getting OutOfGas Error.
The strange thing is that not all cases are ...
- 61
2
votes
1
answer
79
views
Error while trying to run e2e rust ink! tests
Im getting the following error while trying to run e2e rust ink! smart contracts tests:
#![feature(min_specialization)] using the following command: cargo test --features e2e-tests
Im using the ...
3
votes
1
answer
50
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
5
votes
2
answers
123
views
"ERROR: Loading of original wasm failed" after upgrading rustup
I'm getting the following error when compiling a rust ink! 4.0;
ERROR: Loading of original wasm failed
It's started happening to me after I rustup update and now my rustc versions are:
stable-...
3
votes
1
answer
59
views
Problem deploying smart contract on rococo
I have been following the public documentation of polkadot API to deploy contract: https://polkadot.js.org/docs/api-contract/start/code
but I'm getting error Uncaught (in promise) TypeError: code.tx....
- 61
5
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0
answers
63
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?
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4
votes
1
answer
43
views
How to compile to wasm and deploy a custom pallet instead of an ink! smart contract to the Contracts module/pallet?
I enjoy writing custom pallets so I would like to know if instead of writing an ink! smart contract and then compiling it to .wasm and deploying it to the Contracts module/pallet of a Substrate-based ...
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3
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0
answers
26
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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
2
votes
1
answer
40
views
I Can't Generate The right AccountId from Ethereum(H160) Address
I am writing a test to test evm contract instantiation using polkadot api.
I get to derive the evm account like this:
const alice = keyring.addFromUri('//Alice', { name: 'Alice default' });
const ...
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1
vote
1
answer
25
views
Calculation gives the wrong result
After doing a simple calculation in rust ink! 4.0 smart contract, the result is incorrect and doesnt match the expected result.
Here is the simple formula:
let a0_balance_mul:U256 = U256::from(...
3
votes
1
answer
49
views
Error while dividing two u128/Balance types
#[ink(storage)]
pub struct Variables {
a: u128,
b: u128,
multiplier: u128
}
impl Variables {
#[ink(constructor)]
pub fn new(a: u128, b: u128) ->...
- 31
2
votes
0
answers
33
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 ...
- 2,262
1
vote
1
answer
61
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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,...
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5
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2
answers
62
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Trying to implement U256 in rust ink! 4.0
I've implemented use primitive_types::U256 and now I'm trying to return a U256 int as a result from one of my functions, but I'm getting the following error: the trait TypeInfo is not implemented for ...
3
votes
0
answers
25
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 ...
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