Token Incentives — Volume-Based PUMP Token Rewards

Implement and maintain the token incentive system that rewards traders with PUMP governance tokens based on their SOL trading volume, using a day-based epoch system with pro-rata distribution.

Context

The Pump protocol incentivizes trading activity by distributing PUMP tokens to users proportional to their SOL trading volume. The system tracks volume in day-long epochs, with each day having a pre-configured token supply pool.

Day-Based Epoch System

Volume tracking operates in fixed-length epochs defined by the GlobalVolumeAccumulator:

• startTime — epoch system start timestamp
• secondsInADay — epoch length (typically 86,400 seconds)
• solVolumes[] — array of total SOL volume per day
• totalTokenSupply[] — array of PUMP tokens available per day

dayIndex = Math.floor((currentTimestamp - startTime) / secondsInADay)

Pro-Rata Reward Formula

$$\text{tokens} = \frac{\text{userSolVolume} \times \text{dayTokenSupply}}{\text{globalSolVolume}}$$

Account Lifecycle

1. Init (initUserVolumeAccumulator) — creates the user's volume accumulator PDA
2. Sync (syncUserVolumeAccumulator) — updates the accumulator with latest volume data
3. Claim (claimTokenIncentives) — claims accumulated PUMP token rewards
4. Close (closeUserVolumeAccumulator) — closes the account, reclaims rent

BothPrograms Aggregation

Since users trade on both the bonding curve (Pump) and AMM (PumpAMM):

• fetchUserVolumeAccumulatorTotalStats(user) — sums across both programs
• getTotalUnclaimedTokensBothPrograms(user) — combined unclaimed rewards
• claimTokenIncentivesBothPrograms(user, payer) — claims from both
• syncUserVolumeAccumulatorBothPrograms(user) — syncs both

Edge Cases

Case	Behavior
Zero global volume for a day	No tokens distributed (division by zero guarded)
User never synced	Only totalUnclaimedTokens from account state returned
Day index beyond arrays	No additional rewards computed
User updated same day	currentDayTokens returns preview, totalUnclaimedTokens excludes it

Patterns to Follow

• Pure functions in tokenIncentives.ts — no side effects, no RPC calls
• Accept optional currentTimestamp parameter for testability
• Always use BN arithmetic — never convert to JavaScript number
• Sync before claiming to ensure the latest volume is reflected

Common Pitfalls

• totalUnclaimedTokens does NOT include the current day's rewards — only finalized days
• currentDayTokens returns 0 if the user's last update was on a different day (sync first)
• Day indices are zero-based from startTime, not from epoch 0
• Volume accumulator PDAs differ between Pump and PumpAMM programs