Questions tagged [chain-extension]
The chain-extension tag has no usage guidance.
15
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Cannot upgrade contract using chain extension
I am trying to update the code of a smart contract using the chain-extension functionality instead of using the ink_env::set_code_hash method. The contract pallet successfully emits the ...
1
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0
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30
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Error when compiling a contract using the XCM chain extension
I'm trying to implement this xcm chain extension mvp to send a XCM call from a simple contract.
The problem i'm facing is when i try to compile the contract with the given Cargo.toml, i get the ...
2
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1
answer
73
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Update: Access to chain extension method from another module
Summary
I am using an Ink! smart contract (implemented in contract.rs) code calling a chain extension method.
This works well.
However, I want to split my code and call the extension method in a new ...
- 21
1
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1
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100
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How ink! handles DispatchError from ChainExtension
ChainExtension will return Result<RetVal, DispatchError>. (As you can see in the bottom pircutre)
When ChainExtension implementation returns Ok(RetVal::Converging(1)) and handle that status ...
- 101
4
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1
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134
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How can I pass a Vec<u8> via chain extension to pallet?
I am working on chain extension to call rmrk pallet methods. One of the methods needs a BoundedVec that I need to pass via ink smart contract. What data type can I use to do this on smart contract ...
- 105
3
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1
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126
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Using Scheduler Pallet to schedule Contract pallet call
I'm trying to use the Scheduler pallet to schedule a call to the Contracts pallet as part
of a chain extension implementation.
I've managed to get the following to compile and execute:
// In `runtime/...
- 680
2
votes
2
answers
57
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How to receive multiple parameters of different types in chain extension
As ink chain-extension example https://github.com/paritytech/ink/blob/master/examples/rand-extension/runtime/chain-extension-example.rs#L32 .
It show how to receive one param.
But if I want receive ...
- 21
1
vote
1
answer
76
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How can I increase contract memory in pallet-contracts + chain-extension?
I am exposing some external functions to ink! contracts via a chain-extension in pallet-contracts. I am essentially passing a vector of bytes as a parameter to a contract method and directly ...
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1
answer
48
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Contract CodeRejected when using chain extension
I've recently upgraded my chain to the latest substrate master, however, I'm unable to deploy contracts that use a chain extension. When I try to use a chain extension, the contract fails to deploy ...
- 407
1
vote
1
answer
32
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How to retrieve dynamic type size data from chain extension in ink? [duplicate]
my example looks like this :
#[ink(extension = 1111]
fn asset_name(asset_id: u32) -> Result<[u8], PalletAssetErr>
or this
fn asset_name(asset_id: u32) -> Result<[u8], PalletAssetErr>...
- 41
3
votes
1
answer
56
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How to return error from chain extension?
I saw how to handle error from chain extension on smart contract side
https://paritytech.github.io/ink-docs/macros-attributes/chain-extension#error-code
But I can't find example
and can't understand ...
- 41
4
votes
1
answer
61
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How to benchmark a chain extension?
I would like to know the recommended way to benchmark a chain extension, and then how to charge the calculated weight. According to this document, we need to write benchmarks.
- 176
4
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2
answers
89
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Correct way to use dynamic sized types in chain extension
I'm writing chain extensions for my pallets and I have a few functions that require dynamic sized types, for example Vec<u8> for metadata and Vec<u64> for a list of asset ids.
The way I am ...
5
votes
2
answers
119
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How do I test a chain extension used in the runtime?
I am aware of this example that shows how to create a mock chain extension and test that. However, I do not know how to test the chain extension that is used by the runtime and calling functions from ...
- 176
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1
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56
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Chain Extension func_id enumeration is resulting in ContractTrapped for func ids greater than 1
I'm encountering an issue where a contract is only able to called functions in my chain extension if they are enumerated with function ids 0 and 1.
My chain extension has four functions, lets say ...
- 407