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Questions tagged [substrate-node-template]

Posts that reference the Substrate node template, a basic Substrate node typically used for getting started with Substrate.

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11 votes
1 answer
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Understanding service.rs in substrate-node-template

Recently, I have been trying to understand the block import for Aura and Grandpa but I don't understand some parts in substrate-node-template/node/service.rs: 1- In the new_partial() method when ...
dadzerlaze's user avatar
  • 1,083
10 votes
1 answer
308 views

How to change the era period?

I believe the default era period in substrate-node-template is 24 hours. Is there a way for me to change that period?
Kanishka's user avatar
  • 465
9 votes
3 answers
204 views

Error adding Custom RPCs for pallet

I've been trying to add some rpc calls available for my node, but an error related to the 'getrandom' module appears (even tho I'm not even using it). I have a very simple pallet that creates and ...
andresvsm's user avatar
  • 1,114
9 votes
1 answer
250 views

Single node performance

I've a couple of questions: I'm running a the node-template on a machine that has 8 cores and 64GB of RAM and its using an SSD. I have some pallets working there and I'm using the python client to ...
andresvsm's user avatar
  • 1,114
8 votes
6 answers
13k views

How do I fix a failed build error [E0635]: unknown feature 'proc_macro_span_shrink'?

Following the instructions at (https://bruno.id/preparation-for-the-substrate-workshop/) until I received a build error, executing the instructions under the 'Error' heading, I received the following ...
Brian's user avatar
  • 83
8 votes
1 answer
302 views

`MaxEncodedLen` is not implemented for `Vec<u8>`

Here is a simple edit of the pallet/template/lib.rs that uses Vec<u8> in storage: #![cfg_attr(not(feature = "std"), no_std)] pub use pallet::*; #[frame_support::pallet] pub mod ...
Artur Gontijo's user avatar
8 votes
1 answer
103 views

What are the best practices for keeping chain specifications for Devnet, Testnet, and Mainnet environments?

can anybody help me to understand what questions I should address before choosing the approach for keeping the runtime configuration for Devnet/Testnet/Mainnet environments in a substrate-based ...
Yahor Tsaryk's user avatar
7 votes
2 answers
90 views

What are the differences between using declarative and attribute macros in FRAME?

What's the main difference (besides the code) between using the decl_storage! macro rule and using the [pallet::storage] macro? I've seen pretty much everyone using macro rules, but on the latest ...
andresvsm's user avatar
  • 1,114
7 votes
1 answer
157 views

How to perform arithmetic operation on Option<BalanceOf<T>>?

Hello all developers and community members, I am very new to Substrate and Rust. I am creating a pallet for NFT marketplace. for storing out the NFT details I've created a struct as mentioned below. ...
Kapil Yadav's user avatar
7 votes
2 answers
119 views

How to change the number of heap pages

We are running into an allocator memory error where the number of heap pages appears to be insufficient to run a transaction on our validator (substrate-node). This is the error in question: 2022-04-...
shibshib's user avatar
  • 127
7 votes
1 answer
267 views

pallet loose-coupling+tight-coupling, and missing traits

The question is about both types of pallets-coupling. let's say we have 3 pallets A,B, and C. C is tightly coupled to B (C Config is added in B Config), and we want to do a loose Coupling of A and B ...
Kazunobu Ndong's user avatar
7 votes
1 answer
274 views

usage parity-db instead of rocksdb

in the substrate-node-template case , I don't want to compile rocks-db at all. how it would be possible compile parity-db instead of rocks-db?
kayvan jam's user avatar
6 votes
1 answer
277 views

How does Substrate detect the signing scheme when verifying signatures?

Substrate supports multiple signature schemes: ecdsa, sr2551, ed25519. When sending a signed transaction how does substrate know what scheme to use for signature verification?
Yatusabes's user avatar
  • 766
6 votes
2 answers
154 views

How to use substrate archive for custom chains?

In the substrate archive wiki, they showed how to archive the polkadot chain's data. Now I want to get other chains' data (like a substrate template node or Astar, Moonbeam, etc). How can I do that? ...
Minh Mốc's user avatar
  • 1,009
6 votes
1 answer
214 views

Building a substrate node template with a global cargo `target` directory

I'm trying to build a substrate-node-template with the following command: cargo build I have my cargo target-dir set inside a global ~/.cargo/config.toml file: [build] target-dir = "/home/foo/....
Rtsne42's user avatar
  • 379
6 votes
1 answer
91 views

Using Go Runtime in Substrate node template

I am trying to run a local network using Substrate Node Template and have replaced the wasm runtime with one, built from Go. Unfortunately, when I start the network I get the following error: Error: ...
lime's user avatar
  • 121
6 votes
1 answer
60 views

Use of ProposalIndex in pallet-collective

What is the use of ProposalIndex in pallet-collective? However, we also have proposal_hash for identifying the proposal.
Deepak Chaudhary's user avatar
6 votes
2 answers
210 views

What's the different between "Extrinsic" and "RPC" methods for pallets?

I notice that for the nicks pallet there is no need to write a custom RPC or configure that, while with the contracts pallet that need seems to be there. It also seems that in the Substrate Front End ...
Darian Foulds's user avatar
6 votes
1 answer
1k views

Error: failed to run custom build command for `tikv-jemalloc-sys v0.4.3+5.2.1-patched.2`

I was trying to build the substrate-node-template (https://docs.substrate.io/tutorials/v3/create-your-first-substrate-chain/) for the first time. I am using WSL2 with Ubuntu 22.04 LTS. I came to the ...
gmluqa's user avatar
  • 91
6 votes
1 answer
276 views

How to get previous block time using timestamp

How I can get the previous block time using timestamp pallet
Deepak Chaudhary's user avatar
6 votes
1 answer
117 views

What this 'grandpa-voter' error means?

I was doing last section of substrate private network tutorial. Before i stored key set, i could started network smoothly. But after i stored key set of aura and grandpa, i got this error. yc6936@...
Michael kane's user avatar
5 votes
1 answer
940 views

How to add custom RPCs?

I have the template pallet in the Substrate node template. This pallet template has a function do_something that store a value in the storage. I would like to create an RPC call that queries that ...
Alex Bean's user avatar
  • 5,722
5 votes
1 answer
133 views

How to convert substrate Specific Types(Option<BalanceOf<T>> ) to Rust Primitive types (U64)?

I don't know how can I convert Option<BalanceOf> (subtrate specific type)to u64 (rust primitive types)? I followed this article( How do you convert between Substrate specific types and Rust ...
Kapil Yadav's user avatar
5 votes
1 answer
71 views

Substrate dependency management

My team is looking to implement a project in Substrate, and after some studying it seems like a dependency management nightmare. Many of the 'sp' libraries call specific required functions within our ...
Greg Perrin's user avatar
5 votes
1 answer
79 views

Gas less Transactions

Hi I am building a solo chain by using the substrate node template but i am stuck here that i wanna change the gas fee to 0 of every transaction that is happening on the chain this chain will be a ...
Abubakar Mujahid's user avatar
5 votes
1 answer
155 views

adding an account

I just want to simply add an account in the development config but have no idea how to do it, i tried simply adding the seed in the development_config function but it dosent work, what can i do to add ...
Muhammed Rasheed's user avatar
5 votes
1 answer
42 views

Hot Reloading of changes in Pallet in substrate

While developing with substrate when we make changes in pallets and want to quickly test the changes have explicitly stop existing running node and build the node template (which obviously takes time) ...
Arjun's user avatar
  • 317
5 votes
1 answer
473 views

How do the Staking Rewards payouts work?

I've added Staking to substrate-node-template and just explored the feature. I've managed to add validators and nominators and it looks like everything is working well. One thing I'm not able to ...
Kanishka's user avatar
  • 465
5 votes
1 answer
159 views

How to solve this error: associated type `BlockNumber` not found for `T`?

I have substrate node template with babe and i want to integrate orml-currencies. I'm using this in cargo.toml: orml-currencies = { default-features = false, git = "https://github.com/open-web3-...
Deepak Chaudhary's user avatar
5 votes
1 answer
382 views

the trait `WrapperTypeEncode` is not implemented for `ethereum_types::H256` & `ethereum_types::U256`

I am using: ethereum-type version = "0.12", codec = { package = "parity-scale-codec", version = "3.0.0", default-features = false, features = ["derive"]} scale-...
Asmita's user avatar
  • 305
5 votes
1 answer
87 views

Custom deposit function for Substrate runtime

As you're aware, the latest version of substrate removed the need for manual memory management, hence when creating the new SC - tokens are automatically reserved from caller's balance. To my ...
Raid Ateir's user avatar
5 votes
1 answer
312 views

Build a docker file/image for my new pallet

I am using substrate-node-template and recently I added a new pallet. Now I need to build a docker file because I would like to send it for testing. Any information? Thank you.
P.E's user avatar
  • 181
5 votes
2 answers
185 views

How to implement `into_rpc` method in jsonrpsee's rpc macro

I'm trying to add custom RPC to Substrate node template. As explained in the jsonrpsee's proc_macro doc here, I define BalancesApi trait where #[rpc(server)] attribute added, and implement ...
Shunsuke's user avatar
  • 432
5 votes
0 answers
121 views

Query node information from PeerId only

How do I get Listen addresses of a node (and possibly other info like agent, protocols etc..) given that I only have node's PeerId? Is there any existing solutions available for this? Simple enter ...
Matt Duncan's user avatar
5 votes
0 answers
54 views

Error on Launching the First Node Following the Tutorial

I was following the substrate get started tutorial. In the "Trusted Network - Add trusted nodes", I was failed to start the first node step. (I was using the virtual machine and the os is ...
Tony Ma's user avatar
  • 51
4 votes
3 answers
326 views

How do i find the address of the treasury?

I have implemented pallet_treasury just like Kusama, how do i find the resulting address?
Ramsey - Decentration's user avatar
4 votes
1 answer
404 views

How the transaction payment pallet handles transaction fee of every extrinsic?

I was doing some experiments with Substrate Node Template. I found that for every extrinsic, user is charged with some fee. I explored https://github.com/paritytech/substrate/blob/master/frame/...
Boleng's user avatar
  • 497
4 votes
1 answer
185 views

Adding pallet-gilt to a running chain breaks the chain

I am running a simple 2-validator substrate chain with my own keys (https://github.com/paritytech/substrate, branch = polkadot-v0.9.27). I have removed pallet-gilt from the runtime and what I am ...
Zycon's user avatar
  • 63
4 votes
2 answers
101 views

How to fetch all accounts in a pallet?

I need to change the balances of all the accounts in my custom pallet, For that first i need to fetch the accounts in the pallet. How to do this?
Deepak Chaudhary's user avatar
4 votes
4 answers
207 views

How could I configure that reward amount or value for my Aura validators?

Now that the PoA is running with multiple Aura validators in my substrate-node-template. How could I configure that reward amount or value for my validators?
hgminerva's user avatar
  • 467
4 votes
3 answers
247 views

How to increase performance of building Substrate by "cargo build --release" command

I using Substrate-template-node to build pallet and my laptop have Core-i7 chip, but the time to build is range from 9-12 minutes. So, when I change code and have to wait to build and run. So, my ...
Rong Nguyen's user avatar
4 votes
2 answers
3k views

failed to resolve: use of undeclared crate or module `imp`

I got this error when building the whole project 'cargo build --release'. But build package works fine 'cargo build -p pallet-template' error: the wasm32-unknown-unknown target is not supported by ...
Stefan Muto's user avatar
4 votes
2 answers
1k views

error[E0512]: cannot transmute between types of different sizes, or dependently-sized types

I am using the latest substrate-node-template few weeks back it was building fine. But the same project isn't building now, I did not do any changes. Error is occurring in runtime interface. I am ...
Vjendra Gaorh's user avatar
4 votes
2 answers
400 views

Local network does not change validator set

Currently, we have a local test net with 4 substrate nodes using this runtime which has the staking and session pallets. 2 nodes (Alice and Bob) are validators, placed in the chain spec json file and ...
eclesiomelo's user avatar
4 votes
2 answers
208 views

Read a value from offchain storage of a node

I want to read a single value from OffchainStorage of a live substrate node. Is it possible? Assume I can not use localStorageGet rpc request because it is an unsafe rpc.
Matt Duncan's user avatar
4 votes
2 answers
678 views

"error: failed to select a version for `parity-util-mem`"

Currently dealing with an issue building my chain where parity-util-mem is conflicting with parity-util-mem-ban duplicates and I don't know the exact way to specify a certain version for all ...
Monty Jack's user avatar
4 votes
1 answer
89 views

How do I include a new rpc that uses a NetworkWorker in the node-template?

The node-template says its service.rs is a specialisation of that on the substrate master branch. Hence, it's sort of hard to relate the two. Nonetheless, I'd like to expose an RPC endpoint that's ...
islami00's user avatar
  • 561
4 votes
1 answer
116 views

This function takes 2 arguments but 1 argument was supplied

I'm working on a Substrate project, and I have the following storage definition: #[pallet::storage] #[pallet::getter(fn bids)] pub(super) type Bids<T: Config> = StorageDoubleMap< _, ...
Mr Coder's user avatar
  • 923
4 votes
2 answers
89 views

Polkadot vs Rococo runtimes

I noticed various projects having multiple runtimes for Kusama, Polkadot and maybe a local-testnet. This makes sense as they can have different set of features. In my case I only want to test on ...
Yatusabes's user avatar
  • 766
4 votes
1 answer
48 views

How often to refresh chain metadata?

I was surprised to see that there while state_subscribeRuntimeVersion exists, there's no chain_subscribeMetadata so that made me wonder two things: What is the expected process for detecting metadata ...
georgiosd's user avatar
  • 277

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