Web App for exploring Substrate-based Chains using Subxt

Parity Technologies

Last update: Oct 30, 2023

Related tags

Cryptography subxt-explorer

Overview

Subxt Explorer

Check it out at https://paritytech.github.io/subxt-explorer/.

An SPA for exploring metadata of substrate based blockchains in the Browser. Uses Subxt in WASM to connect to nodes, fetch storage values and generate example code snippets of how to interact with the chain using Subxt.

Development:

Prerequisites:

node.js
rust + cargo (nightly)
wasm-pack

# build the wasm module
cd codegen
wasm-pack build --no-default-features --features web
cd ..

# run the frontend
npm install
npm run dev

Comments

Show the `index` for calls

It's handy that pallets have indexes. It'd be really nice to do this for calls as well! (just now I was manually building an extrinsic for a pallet and wanted to check on the call index for it, and realised I couldn't via subxt-explorer :)

opened by jsdw 0
Bump rustix from 0.37.23 to 0.37.25 in /codegen
Bumps rustix from 0.37.23 to 0.37.25.

Commits

00b84d6 chore: Release rustix version 0.37.25

cad15a7 Fixes for Dir on macOS, FreeBSD, and WASI.

df3c3a1 Merge pull request from GHSA-c827-hfw6-qwvm

b78aeff chore: Release rustix version 0.37.24

c0c3f01 Add GNU/Hurd support (#852)

f416b6b Fix the test_ttyname_ok test when /dev/stdin is inaccessable. (#821)

aee5b09 Downgrade dependencies and disable tests to compile under Rust 1.48.

6d42c38 Disable MIPS in CI. (#793)

See full diff in compare view

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dependencies rust
opened by dependabot[bot] 0
Light Client Support

Users can now use their own chain_spec.json files to connect via the Smoldot lightclient integration that subxt can use under the unstable-lightclient feature flag. Also at the start of the web app, chain spec presets are fetched from This Repo via the github API. Currently this amounts to 4 chain specs. They are loaded in about 100ms, so it is not that bad. Users can select these presets instead of supplying their own chain specs:

Also the app state has been cleaned up a little. Creating a client now involves two data structures, a ClientCreationConfig and ClientCreationData. At any point of the app lifecycle, a ClientCreationConfig can be derived from the query params. This is also done at app start. Any ClientCreationConfig can be used to generate ClientCreationData, which then is passed to the Rust Code in WASM to initiate the connection. However the opposite way (ClientCreationData -> ClientCreationConfig) is not always possible. That is because a ClientCreationConfig should be 100% representable in terms of query params. Which is e.g. not possible if a user uploads a file.

There is now the option to share URLs that use light client presets. For this a url needs to contain ?lightclient=Polkadot. This creates a ClientCreationConfig at app starts that is checked against any chain specs obtained from the aforementioned substrate connect repo.

Currently connecting with a light client is super slow. Ofter 30+ seconds. I think it is due to some state synching smoldot is doing. Also Smoldot makes a lot of P2P requests to random IP addresses that sometimes fail (sometimes a lot), which currently clutters the Javascript Console with error messages.

opened by tadeohepperle 1
Sharible URLs if using `Node Url` or `ChainSpec Preset` mode

Introduce a mode variable to the app state: | Mode | User Input | Metadata | Connection | Sharable Links | | ---------------- | -------------------------------------- | -------------------------------------- | ---------------- | -------------- | | Metadata File | a metadata file, e.g. metadata.scale | decoded from uploaded file | - | No | | Node Url | a url to a a node, e.g. | Fetched when constructing OnlineClient | Jsonrpsee Client | Yes | | ChainSpec File | a chainspec file, e.g. polkadot.json | Fetched when constructing LightClient | LightClient | No | | ChainSpec Preset | selection of a chainspec file preset | Fetched when constructing LightClient | LightClient | Yes |

opened by tadeohepperle 0
Integration of Light Client Connection
It should be possible to connect to a chain using the Lightclient in WASM. It needs a chainspec to connect to a chain. There should be two ways to connect:

Drag and Drop a chainspec file, similarly how you can drag and drop metadata in right now.

Have a list of chain specs ready to select from. These can be fetched via GET requests if they are hosted alongside the Webapp.
opened by tadeohepperle 0
`None` in the `QueueConfig` storage item of `XcmpQueue`

When using the Polkadot Explorer with wss://polkadot-asset-hub-rpc.polkadot.io navigating to https://paritytech.github.io/subxt-explorer/#/pallets/XcmpQueue/storage_entries#QueueConfig shows None for the QueueConfig storage item while polkadot Js can retrieve it: https://cloudflare-ipfs.com/ipns/dotapps.io/?rpc=wss%3A%2F%2Fpolkadot-asset-hub-rpc.polkadot.io#/chainstate

opened by tadeohepperle 0

Owner

Parity Technologies

Solutions for a trust-free world

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