Contracts: Staking program (Solana / Anchor)

[PetarStoev02]

Parent

Part of #13 (Phase 4: Smart Contracts + Templates)

Goal

Create an Anchor staking program for SPL tokens.

Requirements

• Stake and unstake SPL tokens
• Reward distribution based on time staked
• Configurable reward rate
• Anchor test suite
• .learn.md with explanations and security considerations

Location

contracts/solana/staking/

[github-actions]

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