Staking Pool

Token staking with configurable reward rates and compound interest

Deployed Anchor 0.32

Program ID E3xDfoQKgqdCNgnK1B77xgRjKYjEsBCXvPxZDGoxercH

Repository ExpertVagabond/solana-staking-pool

Binary Size 344K

Cluster Devnet

Instructions

IX initialize_pool

Creates a new staking pool for a specific token mint with a configurable reward rate.

Parameter	Type	Description
`reward_rate`	`u64`	Reward tokens distributed per second per staked token

IX stake

Stakes tokens into the pool, creating or updating the user's stake entry.

Parameter	Type	Description
`amount`	`u64`	Number of tokens to stake

IX unstake

Withdraws staked tokens from the pool back to the owner's wallet.

Parameter	Type	Description
`amount`	`u64`	Number of tokens to unstake

IX claim_rewards

Claims accumulated staking rewards without unstaking the principal.

Parameter	Type	Description
No parameters

Accounts

StakePool

Field	Type	Description
`authority`	`Pubkey`	Pool creator and configuration authority
`mint`	`Pubkey`	Token mint for this staking pool
`reward_rate`	`u64`	Reward rate per second per staked token
`total_staked`	`u64`	Total tokens currently staked in the pool
`accumulated_reward`	`u64`	Accumulated reward per token (scaled)
`last_update`	`i64`	Timestamp of the last reward calculation
`bump`	`u8`	PDA bump seed

StakeEntry

Field	Type	Description
`pool`	`Pubkey`	The staking pool this entry belongs to
`owner`	`Pubkey`	Wallet that owns this stake
`amount`	`u64`	Number of tokens staked
`reward_debt`	`u64`	Reward debt for accurate reward calculation
`bump`	`u8`	PDA bump seed

PDA Derivation

pool

seeds = [b"pool", authority, mint]

stake

seeds = [b"stake", pool, owner]

vault

seeds = [b"vault", pool]

Error Codes

InsufficientStake Cannot unstake more tokens than currently staked

NothingToClaim No rewards have accrued since the last claim

Overflow Arithmetic overflow in reward calculation

Usage Example

import { Program, BN } from "@coral-xyz/anchor";
import { PublicKey } from "@solana/web3.js";

// Derive PDAs
const [poolPda] = PublicKey.findProgramAddressSync(
  [Buffer.from("pool"), authority.publicKey.toBuffer(), mint.toBuffer()],
  program.programId
);
const [stakePda] = PublicKey.findProgramAddressSync(
  [Buffer.from("stake"), poolPda.toBuffer(), staker.publicKey.toBuffer()],
  program.programId
);

// Stake 1000 tokens
await program.methods
  .stake(new BN(1_000_000_000))
  .accounts({
    pool: poolPda,
    stakeEntry: stakePda,
    owner: staker.publicKey,
    mint,
  })
  .signers([staker])
  .rpc();

Solana Programs