7
votes
Accepted
How to verify EVM contracts with openzeppelin using subscan or blockscout
In order for Blockscout to verify your source code it requires that you upload the source of each smart contract you want to verify. That means all the source code used to generate binary. Note that ...
- 659
6
votes
How to calculate the optimal tip for Substrate
The Substrate transaction queue uses solely the transaction priority passed via the SignedExtension API to prioritise which transactions make it into a block.
I'm not at all familiar with EIP-1159 and ...
- 2,681
5
votes
Accepted
Ink! smart contracts and extrinsics
ChainExtension is what you are looking for. It allows the runtime developer to register some native functions in the ink! wasm environment, and allow the ink! code to interact with the pallets ...
- 732
5
votes
Accepted
Private key for EVM Frontier
IIUC, these are two different crypto systems.
The public key works. But it doesn't mean anything.
You can even make a transfer to 0x12345.... But you don't know its private key.
You need to generate ...
- 11.2k
4
votes
Accepted
Process ethereum transactions in an offchain worker
You can use some of the tools from: https://github.com/rust-ethereum/.
Namely, if you're looking to create Ethereum transactions in an offchain worker then this should work:
https://github.com/rust-...
- 1,214
4
votes
Accepted
Existential deposit in EVM compatible address
It is up to each individual chain to decide.
By default, EVM uses pallet-balances to handle native token, so the same ED rule applies.
It is possible to configure the pallets to use other pallets to ...
- 826
4
votes
What is the best way to deploy Substrate and EVM based blockchain?
You can deploy to Moonbeam/Astar or if you fancy having a go yourself you can check out the EVM Pallet
https://paritytech.github.io/frontier/frame/evm.html
- 1,233
4
votes
Private key for EVM Frontier
my question is how I calculate the ETH private key of this account?
There is no way to do that =/
The most important thing to note here is that the mnemonic:
worth wrestle meat ecology merry ginger ...
- 1,047
4
votes
Accepted
Is it possible to use ink! with Ethereum-style accounts?
Wondering if anyone knows whether ink! supports AccountIds which are
ethereum-style accounts?
Yes. pallet-contracts will work with the unified account setup you referenced. It is generic over the ...
- 3,615
4
votes
Accepted
How to interact between a smart contract written in Solidity from a smart contract written in ink!?
But how would it be possible to build smart contracts written in ink! that call public functions in smart contracts written in Solidity and vice versa?
We need to distinguish between Solidity ...
- 66
3
votes
Accepted
Why does the Astar XC20 wrapper example use the ERC20 wrapper functionality?
The BAI is existing ERC20 token on Astar EVM. In order to make that token xChain it needs to be connected via Astar precompile ERC20Plus with the new xcBAI asset. For this connection to happen we need ...
- 659
3
votes
Accepted
Is it possible to run moonbeam/Astar as a standalone network
It's possible. In this case, your network will have to run (and use) its own finality gadget (rather than that of the relay chain). You can implement the GRANDPA pallet in your network for block ...
- 388
3
votes
Implementing min gas fee for pallet_evm
To activate and set the BaseFee in your Frontier-based chain, you can simply change these runtime parameters:
frame_support::parameter_types! {
pub IsActive: bool = true;
pub ...
- 355
3
votes
Accepted
Similar eth_call for substrate
There is actually. There is a JSONRPC endpoint named state_call. It works in a similar way to eth_call.
You can see the definition here.
- 2,194
3
votes
What is the best way to deploy Substrate and EVM based blockchain?
Most evm compatible substrate chains uses pallet-evm and pallet-ethereum provided by frontier, for example Moonbeam, ChainX, Edgeware etc.
You can start with the Substrate Frontier Node Template ...
- 301
3
votes
What is the best way to deploy Substrate and EVM based blockchain?
You can turn your substrate into being as close as possible to ethereum by adopting ethereum conventions for example changing address types to match. But if you do that, those addresses need a ...
- 3,901
3
votes
Accepted
Is it possible call wasm from evm smart contract on substrate chain?
It is be possible through Astar Network xvm_pallet, interaction between WASAM and EVM Contract. You can go through this article and there is also video for this.
- 1,253
3
votes
Explorer for Substrate-based EVM chains
Yes, there is an open source indexer and explorer called Blockscout, which is fairly user-friendly. You can use for your Substrate-based EVM chain.
Here are some examples of its usage by Moonbeam ...
- 355
3
votes
Private key for EVM Frontier
Thanks to AurevoirXavier and Artur for the responses, as they explained to sign and send Ethereum Transactions using a Substrate Account has to be done via the EVM pallet.
I just want to add here the ...
- 5,767
3
votes
How to change evm token decimals?
You should, and I recommend changing your native token decimals. Otherwise, you need a converter.
Then, I have a question.
Why do you need EVM? This will break almost every existing thing (such as ...
- 11.2k
3
votes
Is it possible to use ink! with Ethereum-style accounts?
You can use Ethereum accounts in ink! as long as pallet-contracts is present.
You can use ink! on any blockchain that was built with the Substrate
framework and includes the pallet-contracts
module.
...
- 1,514
2
votes
Why should you start with Substrate?
Substrate allows you to handle the complex processes of Blockchain development without the limitations imposed by other frameworks. Since its launch, Substrate has been shaped to be a flexible and ...
- 37
2
votes
Smart contract to IPFS communication
here's some potentially useful docs: https://rs-ipfs.github.io/offchain-ipfs-manual/substrate-core-modifications.html
- 1,727
2
votes
Accepted
trait bound `H256: TypeInfo` is not satisfied; `TypeInfo` is not implemented for `H256, H160, H64, ethereum_types::U256`
This looks like mismatching versions.
cargo tree -p scale-info will show you.
ethereum-types has very permissive requirements for scale-info, so maybe a cargo update -p scale-info will fix the ...
- 1,207
2
votes
Accepted
Can an off-chain worker read/write the state of an EVM contract?
I don't know much about EVM and Frontier, but in general offchain workers cannot write to the state directly, so if they call into a function directly that has some side effect, it will be ignored. ...
- 2,864
2
votes
Private key for EVM Frontier
The best way I found to interact with the EVM in Substrate Frontier is to use the Web3.js lib as explained in this Moonbeam tutorial: https://docs.moonbeam.network/builders/build/eth-api/libraries/...
- 51
2
votes
Accepted
Unified accounts with AURA
Check Darwinia2.0. We are doing this now.
https://github.com/darwinia-network/darwinia-2.0
But for the session keys, it's still Sr25519. This is decided by AURA.
Key point: https://github.com/...
- 11.2k
2
votes
Accepted
`UnknownTransaction::CannotLookup` error on each extrinsic
I've fixed it by making these changes in my runtime:
In the frame_system::Config, changed Lookup from type Lookup = AccountIdLookup<AccountId, ()>; to type Lookup = sp_runtime::traits::...
- 436
2
votes
Accepted
NFT Enlisting on OpenSea
You should ask Opensea to list your network...
https://support.opensea.io/hc/en-us/articles/4404027708051-Which-blockchains-are-compatible-with-OpenSea-
- 11.2k
2
votes
How to add evm and ethereum pallet from scratch into substrate node?
If you are totally new first take a look into the Substrate Documentation: Add a pallet to the runtime.
Then take a look into the Frontier Node Template, it is a template node that has this two ...
- 5,767
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