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https://github.com/pezkuwichain/pezkuwi-subxt.git
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honeywest
122 lines
4.2 KiB
Plaintext
122 lines
4.2 KiB
Plaintext
= Structure
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:Author: Substrate developers
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:Revision: 0.3.0
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:toc:
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:sectnums:
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== Overview
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Substrate is split into multiple levels with increasing opinion and decreasing flexibility:
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* primitives
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* client
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* FRAME (formerly `srml`)
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Putting all these components together we have:
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* Integration Tests
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* Node
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* Node template
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* Subkey
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=== Runtime
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* _found in_: `/primitives`
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* _crates prefix_: `sp-`
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* _constraints_:
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** must be `[no_std]`
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** crates may not (dev-)depend on crates in other subfolders of this repo
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In the lowest level, Substrate defines primitives, interfaces and traits to implement any on-chain Substrate transition system and its interactions with the outside world. This is the lowest level of abstraction and opinion that everything else builds upon.
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=== Client
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* _found in_: `/client`
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* _crates prefix_: `sc-`
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* _constraints_:
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** crates may not (dev-)depend on any `frame-`-crates
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In the client you can find a set of crates to construct the outer substrate-node, implementing outer runtime interfaces, thus it depends on `runtime`. It provides the outer building blocks like transaction queue, networking layer, database backend, full* and light-client support.
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=== FRAME (formerly `srml`)
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* _found in_: `/frame`
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* _crates prefix_: `frame-` and `pallet-`
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* _constraints_:
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** all crates that go on chain must be `[no_std]`
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** must not (dev-)depend on anything in `/client`
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FRAME is a set of modules that implement specific transition functions and features one might want to have in their runtime.
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_Pallets_ are individual modules within _FRAME._ These are containers that host domain-specific logic. They have the `pallet-` prefix. For example, `pallet-staking` contains logic for staking tokens.
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There are a few crates with the `frame-` prefix. These do not contain domain-specific logic. Rather, they are the main FRAME support infrastructure. These are:
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- Executive
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- Metadata
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- Support
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- System
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- Utility
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=== Integration Tests
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* _found in_: `/test`
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* _crates prefix_: `substrate-test`
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* _constraints_:
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** only helpers may be published
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** purely testing crates must be `publish = false`
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All tests that have to pull (dev)-dependencies out of their subtree and would thus break the dependency rules are considered integration tests and should be stored in here. Only helper-crates in here shall be published, everything else is expected to be non-publish.
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=== Binaries and template
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* _found in_: `/bin`
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We also provide some binaries pulling from the components creating full applications.
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==== Node
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* _found in_: `/bin/node`
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The default (testing) application pulling together our recommended setup of substrate-client with a wasm-contracts-supporting frame-runtime. The node pulls it all together, constructs the (upgradable) runtime, and wires up the client around it. You can find an example client, which includes a full wasm-contracts chain in `node`. This is also what is being built and run if you do `cargo run`.
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==== Node Template
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* _found in_: `/bin/node-template`
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We also provide a template to get you started building your own node.
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==== Utils
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* _found in_: `/bin/utils`
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- **subkey**
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Subkey is a client library to generate keys and sign transactions to send to a substrate node.
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- **chain-spec-builder**
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The chain spec builder builds a chain specification that includes a Substrate runtime compiled as WASM. To ensure proper functioning of the included runtime compile (or run) the chain spec builder binary in `--release` mode.
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== Internal Dependency Tree
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[ditaa]
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....
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+---------------+ +----------------+
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| runtime +<------+ frame |
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+------+-----+--+ +-------------+--+
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^ ^ ^
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| +----------------+ |
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+------+--------+ | |
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| client | +--+-------+--------+
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| +<---------+ |
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+---------------+ | |
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| test /bin/* |
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+-------------------+
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....
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