Lesson 1Runtime protections: on-chain limits, slippage bounds, debt ceilings, rate limitsThis part explains runtime guards that set safe bounds, including on-chain limits, slippage controls, debt caps, rate limits that hold protocol under stress or attack.
On-chain limits and guardrail parametersSlippage bounds and price impact capsDebt ceilings and exposure controlsRate limits and throughput throttlingKill switches and graceful degradationLesson 2Safe upgrade and deployment strategies: immutable core vs upgradeable modules, upgrade governanceThis part explains safe deploy and update ways, comparing fixed cores and updatable parts, setting update governance, testing lines, rollback plans to cut risk in contract changes.
Immutable core versus upgradeable modulesProxy patterns and storage safetyUpgrade governance and voting flowsStaging, canary, and phased rolloutsRollback, freezes, and migration plansLesson 3Secure smart contract design patterns: checks-effects-interactions, pull-over-push, nonReentrant, circuit breakersThis part introduces core safe design ways for contracts, like checks-effects-interactions, pull-over-push pays, nonReentrant guards, circuit breakers that limit bug or attack damage.
Checks-effects-interactions patternPull over push payment mechanismsReentrancy guards and nonReentrantCircuit breakers and emergency stopsAccess control and capability patternsLesson 4Developer processes: code review checklists, pre-merge CI gates, dependency management, reproducible buildsThis part covers safe dev processes, including code check lists, pre-merge CI gates, dependency handling, repeatable builds that ensure steady, checkable, tamper-proof releases.
Security-focused code review checklistsPre-merge CI and mandatory test gatesManaging third-party dependenciesReproducible and deterministic buildsRelease signing and artifact verificationLesson 5Key management and operational hygiene: hardware wallets, threshold signatures, secret rotation policiesThis part covers safe key life handling for blockchain ops, including hardware wallets, threshold signs, backup recovery, rotation rules, ops cleanliness to stop key theft, misuse, loss.
Hardware wallets for operational signersThreshold and MPC signing architecturesSecure key backup and recovery plansKey rotation and revocation proceduresWorkstation and network hygiene controlsLesson 6Documentation and transparency: security disclosures, public parameters, bug bounty visibilityThis part describes how to doc security ideas, public params, admin powers, update rules, and run clear bug bounties that help users and checkers understand and trust the system.
Documenting trust and threat modelsPublishing admin roles and powersPublic parameters and risk disclosuresBug bounty scope and visibilityChangelogs and user-facing updatesLesson 7Monitoring and incident response: metrics to track, alert thresholds, playbooks, and forensics preparationThis part details how to watch blockchain, set security and steady metrics, config alert levels, prepare incident guides, collect check data for quick probes and good postmortems.
Core security and reliability metricsAlert thresholds and escalation pathsIncident response playbook designOn-chain and off-chain log collectionForensics readiness and evidence handlingLesson 8Admin controls and governance: multisig, timelocks, role separation, emergency pause proceduresThis part explains how to build strong admin governance using multisig wallets, timelocks, role splits, emergency pause controls, cutting single fails and limiting privileged action spread.
Designing secure multisig admin walletsConfiguring timelocks for critical actionsRole separation and least privilege modelsEmergency pause and circuit breaker runbooksDelegation, signers rotation, and auditsLesson 9Oracle hardening controls: multi-source feeds, TWAP, oracle guardians, dispute windowsThis part focuses on strengthening oracle designs using multi-source feeds, TWAP, guardians, dispute times, failover ways to cut trick risk and ensure steady, trusted price data.
Multi-source and medianized price feedsTWAP and liquidity-aware pricingOracle guardians and kill switchesDispute windows and challenge flowsFailover, liveness, and stale data checksLesson 10Testing and QA best practices: deterministic tests, fuzz targets, simulated attacker testsThis part shows testing and QA ways for contracts, including steady unit tests, fuzzing, property tests, sim attacker cases that show edge spots and security weak points.
Deterministic unit and integration testsFuzzing and property-based testingSimulated attacker and chaos testsTest coverage and invariant trackingTest data, fixtures, and environments
