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Results tagged with ink
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user 275
eDSL to write smart contracts in Rust for blockchains built on the Substrate framework
1
vote
1
answer
153
views
How to recover AccountId from ECDSA signature in ink!
In ink! 4.0 ink::env crate, it provides ecdsa_recover function.
It returns compressed public key &[u8, 33] as is explained here.
Assumed that blake2 is used for hashing. … #[ink(message)]
pub fn verify(&self, req: ForwardRequest, signature: [u8; 65]) -> bool {
let mut message_hash = <ink::env::hash::Blake2x256 as ink::env::hash::HashOutput>::Type::default();
ink: …
- 432
1
vote
Accepted
Using Permill in the ink! contract
In above example,
royalty: Option<u32>,
on ink! smart contract side. …
- 432
2
votes
1
answer
100
views
pallet-contracts and ink! version (v3.x.x & v4.0.0) compatibility
ink! v4.0.0 release is incoming. … Are there any backward incompatibility issues with ink! v3.4.0 or lower? which contracts developers need to be aware of.
If yes, what exactly are they? …
- 432
3
votes
How to deploy smart contract in ink which constructor takes value in params
Constructor takes Balance instead of boolean.
So, you need to pass some Balance value via swanky command.
E.g. swanky contract deploy erc20 --account alice -g 10000000000 -a 10000000
- 432
1
vote
1
answer
148
views
How ink! handles DispatchError from ChainExtension
(As you can see in the bottom pircutre)
When ChainExtension implementation returns Ok(RetVal::Converging(1)) and handle that status code 1 on ink! … The question is
What is the appropriate way for ink! smart contract messages to handle DispatchError (from ChainExtension) and return it as its returned value? …
- 432
3
votes
Accepted
cargo contract throws error about supplied arguments in ` #[ink(constructor)]` for version 3...
I had the same situation above.
After specify indirect dependencies' version declaratively, I succeded to compile and deploy contracts to the local node with pallet-contracts polkadot-v0.9.19 support. …
- 432