Solana Program Library (SPL)

The Name Service is an SPL program designed for issuing and managing the ownership of various identifiers, including:

• Domain names
• Solana Pubkeys
• URLs
• Twitter handles
• IPFS CIDs
• Metadata

It provides an interface and implementation that allows third parties to build and utilize their own custom versions of a name service.

The Single-Validator Stake Pool is an SPL program designed for trustless liquid staking. It allows for zero-fee liquid staking with no counterparty and 100% capital efficiency.

Key features:

• Defines a canonical pool for every vote account.
• Pools can be initialized permissionlessly.
• Mints tokens in exchange for stake delegated to a designated validator.
• It is a stripped-down version of the multi-validator stake pool program, containing ~80% less code to minimize execution risk.

The Token Lending program is a lending protocol for the Token program on the Solana blockchain, inspired by Aave and Compound. It allows for the creation of lending markets and the management of reserves.

Resources:

• Full Documentation: https://spl.solana.com/token-lending
• Client Library Docs: https://solana-labs.github.io/solana-program-library/token-lending/
• CLI Docs: https://github.com/solana-labs/solana-program-library/tree/master/token-lending/cli
• Web3 Bindings: Available in the ./js directory of the repository.

The SPL Name Service is a program designed for issuing and managing ownership of various identifiers, including domain names, Solana Pubkeys, URLs, Twitter handles, and IPFS CIDs.

Core Concepts:

• Name: A string that maps to a Program Derived Account (PDA) containing data.
• Class: A category for names. Each class has an authority (pubkey) that must sign for the issuance of names within that class.
• Owner: The pubkey that owns the name.
• Hierarchy: Names can have a parent name (identified by the parent's record address). Issuing a child name requires the signature of the parent name's owner.
• Data Control: Data within a name registry is controlled by the class keypair. If the class is set to Pubkey::default(), the data is controlled by the name owner keypair.
• Deletion: Only the owner can delete a name registry.

The spl-account-compression Rust SDK provides implementation details for account compression on Solana. This crate is specifically targeted towards supporting Metaplex Compressed NFTs and its implementation details may be subject to change.

For more detailed information regarding account compression, refer to the main solana-program-library repo.