Debug and Optimize Blockchain Codebase

$30-250 CAD

Closed

Posted 7 days ago

$30-250 CAD

Paid on delivery

BUDGET; 150 CAD, OUTSOURCING, SEE CODE ATTACHED I’m looking for an experienced blockchain developer to review, debug, and fully fix an existing codebase involving advanced DeFi mechanisms, including flash loans and a custom “flash bets” system integrated with ultra-fast, short-resolution markets. Project Context This system is designed to interact with instant-resolution betting markets and prediction markets, where outcomes resolve in seconds. The strategy focuses on arbitrage opportunities where pricing inefficiencies allow for risk-minimized profit when executed correctly and atomically. Important: The current system is not functioning correctly, and part of this job is to identify why (especially flash loans failing) and ensure everything works end-to-end in real conditions. Scope of Work Review the entire codebase for bugs, vulnerabilities, and inefficiencies Debug and fix critical issues preventing execution, especially: Flash loan failures (reverts, incorrect callbacks, repayment issues) Flash bets not executing or resolving properly Transaction flow breaking before completion Ensure all core features function correctly: Flash loan execution (borrow → execute → repay within one transaction) Flash bets execution with strict requirement that bets are placed and resolved within the same transaction (atomic execution) Flash Loan Logic (Critical Fix Required) Diagnose and fix why flash loans are currently failing Ensure proper integration with liquidity providers (e.g., correct interfaces, callbacks, approvals) Implement and/or refine logic to: Analyze wallet/contract balance prior to execution Determine and request the maximum viable flash loan size based on that balance Ensure repayment (including fees) is always satisfied within the same transaction Ensure: Capital is sourced from external liquidity pools/providers (deep liquidity) Strategy does not rely on personal funds beyond gas/fees Routing prioritizes high-liquidity pools to support larger position sizes Arbitrage Engine (Core Requirement) Implement, validate, and debug logic that: Detects arbitrage opportunities using implied probability calculations Confirms opportunities only when: Combined implied probability of all outcomes is < 100% Example logic to support: Convert odds to implied probability: Positive odds: 100 / (odds + 100) Negative odds: |odds| / (|odds| + 100) Identify arbitrage when total probability < 100% Dynamically calculate bet sizing across outcomes to: Balance returns across all possible outcomes Target consistent profit regardless of result (subject to execution conditions) Ensure: Bet sizing integrates with flash loan amount Entire arbitrage cycle (loan → bets → settlement → repayment) executes atomically Flash Bets + Market Execution Debug and ensure flash bets: Actually trigger and execute reliably Resolve within the same transaction where possible Do not fail due to timing, state changes, or external calls Must support: In-play instant markets Flash markets (micro-events) Prediction market pre-resolution opportunities Optimization & Risk Handling Optimize for: Execution speed Gas efficiency Reliable transaction inclusion Identify and mitigate: Slippage risks Liquidity constraints Oracle delays or inconsistencies MEV risks (frontrunning, sandwiching) Critical Requirements All logic must execute atomically in a single transaction Flash loans must be: Fully functional (no silent failures or partial execution) Properly repaid within the same transaction Sized dynamically using wallet balance + liquidity availability System must: Connect to deep liquidity providers Maximize usable capital per trade Execute arbitrage opportunities with balanced outcomes Deliverables Fully working, debugged, tested, and optimized code Clear fix for why flash loans were failing and how it was resolved Verified atomic execution of: Flash loans Flash bets Arbitrage strategy Working arbitrage detection + bet sizing logic Summary of issues found and fixes applied Recommendations for further improvements To Apply Please include: Experience debugging broken smart contract systems (not just building new ones) Experience with flash loan integrations and troubleshooting failures Examples of arbitrage bots or DeFi execution systems Your approach to identifying and fixing execution issues Timeline and rate

Project ID: 40418584

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12 freelancers are bidding on average $148 CAD for this job

@SmartCodeDev

Hello, I can review and fix your DeFi codebase with a focus on resolving flash loan failures, broken transaction flows, and ensuring fully atomic execution of your arbitrage and flash bet logic. I have hands on experience debugging smart contracts, fixing callback and repayment issues, and working with flash loan providers and arbitrage systems under real execution conditions. I will identify the root cause of failures, repair integrations, and validate the full cycle from loan to execution to repayment within a single transaction. I can also stabilize your arbitrage detection and bet sizing logic to ensure consistent and reliable outcomes. You will receive a working optimized codebase along with a clear report of issues found and fixes applied. I can start immediately and deliver within a short timeline based on code complexity.

$150 CAD in 7 days

5.0

(1 review)

2.8

@cindyviorinar

Hello, I am Cindy Viorina, an experienced blockchain developer with a strong focus on debugging and optimizing smart contract systems, particularly involving DeFi mechanisms like flash loans and complex betting systems. I understand that the current codebase faces critical issues, particularly with flash loans and the atomic execution of flash bets. My approach is to conduct a thorough review of the provided code, identify vulnerabilities, and ensure each function operates seamlessly. I have worked on similar projects where I improved execution speed, gas efficiency, and resolved flash loan failures through precise debugging. To solve your challenges, I will specifically analyze the transaction flow, integrate with liquidity providers effectively, and validate the execution within a single transaction. This will include diagnosing issues with repayment and ensuring all arbitrage opportunities are identified and executed reliably and dynamically. I am available for real-time communication according to your time zone and can provide a working demo or prototype within 12 hours of commencement. Q1: What specific issues have you encountered with the flash loans so far? Q2: Are there any specific security measures or protocols you want to enforce? Q3: What’s your timeline for the completion of this project? Looking forward to collaborating on this exciting project! Best regards, Cindy Viorina

$30 CAD in 15 days

0.0

(0 reviews)

0.0

@smitk9999

Hello, I can review, debug, and fix your Solidity flash loan and flash bets codebase, including reverts, callbacks, repayment logic, approvals, and atomic execution flow. I’ve worked with complex backend and financial transaction systems where reliability, state handling, and edge-case debugging are critical. For this project, I’ll trace the failing transaction path first, identify whether the issue is interface mismatch, liquidity provider callback logic, allowance, fee repayment, or timing/state dependency. I’ll also review the arbitrage calculation, implied probability logic, bet sizing, liquidity limits, and risk points like slippage, MEV, oracle delay, and gas usage. The goal is to make the full cycle execute safely in one transaction or clearly document where external market constraints prevent that. I’m ready to start right away. Could you share the attached codebase, failing transaction hashes, and target flash loan provider? Best, Smit

$140 CAD in 3 days