01 Fixing calculateDBPMPayouts with Test Functionality

[pwdel]

• calculateDBPMP was outputting payouts to both winners and losers.
• Adding test functionality for proof of fix
• This change may have been superseded by: Refactoring Payout #431

Works on Local after testing, all tests passed.

Upon further analysing and comparing to 432 which had already been merged into main, calculateDBPMPayouts should be merged and used because:

Branch Comparison: payoutbyratio vs calculatedbpmpayouts

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1 Structural / Directory-Level Differences

🔹 Only in calculatedbpmpayouts

New / moved package / file	Purpose (quick read)
handlers/math/payout/*	Payout core moved out of handlers/markets/; exposes DistributePayoutsWithRefund, splits logic further.
handlers/math/positions/*	Centralises share-count ↔ valuation math; adds rounding-correction helper.
security/* (ratelimit.go, headers.go, sanitizer.go + tests)	Mini security middleware: header hardening, simple rate-limit, HTML/JS sanitiser.
handlers/users/apply_transaction.go	Single entry for credit/debit with enums (TransactionWin, etc.).
Several README_*.md files	Dev notes for math & users modules.
Extra bot / WPAM tests (wpam_current_test.go)	Unit tests for the probability algorithm.

🔹 Only in payoutbyratio

File	Purpose
handlers/markets/resolvemarketpayouts.go	Ratio-based payout (SelectWinningPositions, AllocateWinningSharePool).
handlers/markets/resolvemarketcore.go	Thin wrapper that calls the above and updates balances in-place.
handlers/users/updatebalanceafterpayout.go	Direct balance-mutation helper.
(draft) handlers/math/financials/calculateprofit.draft.go	Early stub for profit calculations.

Take-away: calculatedbpmpayouts is much more than just “DBPM payout.”
It introduces a security layer, new math/positions abstraction, extra tests, and rewires payout logic into its own package.

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2 Logic Overlap vs. Divergence

Concern	payoutbyratio branch	calculatedbpmpayouts branch
Payout algorithm	Distributes market volume pro-rata to winning shares (ratio = userShares / totalWinningShares).	Calls positionsmath.CalculateValuations_WPAM_DBPM() first, then pays out integer valuations. Also refunds on “N/A” resolutions.
Payout-code location	Lives under handlers/markets/; touches HTTP handler directly.	Lives under handlers/math/payout/; markets handler merely orchestrates → test-friendly.
User balance updates	Helper updatebalanceafterpayout.go mutates balances directly.	ApplyTransactionToUser() centralises balance changes & labels them (TransactionWin, TransactionRefund, …).
Safety / error handling	Minimal checks (nil market, zero shares).	Adds explicit nil checks, DB tx rollbacks, structured logs.
Tests	4 payout-focused unit tests.	12 payout/position tests plus security & WPAM tests.

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3 What’s Already on main

• Ratio-based payout (handlers/markets/*).
• No security/* middleware.
• No handlers/math/payout/* separation.
• Fewer unit tests around payout/positions.

[astrosnat]

LGTM but why are some of the backend tests failing?

[pwdel]

LGTM but why are some of the backend tests failing?

Which ones @astrosnat ? Can you paste the results you are getting?

[pwdel]

@astrosnat

Whoops, didn't realize results are in the pipeline now.

ok  	socialpredict/handlers/positions	0.050s
--- FAIL: TestGetSetupHandler (0.00s)
    --- FAIL: TestGetSetupHandler/successful_load (0.00s)
        setuphandler_test.go:73: successful load: handler returned unexpected body: got {"MarketCreation":{"InitialMarketProbability":0.5,"InitialMarketSubsidization":10,"InitialMarketYes":0,"InitialMarketNo":0},"MarketIncentives":{"CreateMarketCost":10,"TraderBonus":1},"User":{"InitialAccountBalance":0,"MaximumDebtAllowed":500},"Betting":{"MinimumBet":1,"BetFees":{"InitialBetFee":1,"BuySharesFee":0,"SellSharesFee":0}}}
             want {
            				"MarketCreation":{"InitialMarketProbability":0.5,"InitialMarketSubsidization":10,"InitialMarketYes":0,"InitialMarketNo":0},
            				"MarketIncentives":{"CreateMarketCost":10,"TraderBonus":1},
            				"User":{"InitialAccountBalance":0,"MaximumDebtAllowed":500},
            				"Betting":{"MinimumBet":1,"BetFees":{"InitialBetFee":1,"EachBetFee":0,"SellSharesFee":0}}}
FAIL
FAIL	socialpredict/handlers/setup	0.004s
ok  	socialpredict/handlers/stats	0.006s [no tests to run]

I'll look into this.

[pwdel]

Need to fix tests then can merge

[pwdel]

Finished this set of features so I'm going to try to merge main back into this branch here above. #438

[pwdel]

/draft

[pwdel]

We need to do usability testing on this @astrosnat because I had noted that this may have been superseded by:

#431

Basically we should see if it gives us the results we are looking for.