Solana smart contract built with Anchor.

Design

A feature-poor, tightly scoped smart contract for p2p betting.

• Makers offer bets, designating a settlement authority, posting all data onchain (bet is 'offered')
• Makers specify payouts, which can be asymmetrical, in native SOL
• Anyone takes any offered bet in (exactly) the size specified by the maker (bet is then 'live')
• On or after the settlement date, settlement authority decides the outcome (bet is then 'settled')
• On settlement, contract sends funds to the winner, cleans up bet state, and repays Solana blockspace rent to the maker

Structure

Directory structure lightly modified from anchor init --test-template rust:

.
├── Anchor.toml           # anchor framework config
├── Cargo.toml            # rust workspace
├── app                   # front end code, eventually
├── cli                   # cli to offer, take, and settle bets
├── programs              # smart contracts
│   └── bet               # main program I'm working on
├── tests                 # tests that use LiteSVM (in process SVM)

Prerequisites

Install Rust, Anchor, and the Solana CLI.

Usage

See the cli README for details.

Development

Key setup*:

• Program keys are generated automatically by programs/build.rs, which
  • generates a new keypair under ./keys/ if none exists
  • writes it into the program source
  • updates Anchor.toml to set the program address

* Unclear if this is misguided. The default is pretty cumbersome but I might just be misunderstanding the workflow.

Run tests:

anchor test