Lesson 1Runtime protections: on-chain limits, slippage bounds, debt ceilings, rate limitsDis section explains runtime protections dat enforce safe operatin' bounds, includin' on-chain limits, slippage controls, debt ceilings, an' rate limits dat constrain protocol behavior under stress or attack.
On-chain limits an' guardrail parametersSlippage bounds an' price impact capsDebt ceilings an' exposure controlsRate limits an' throughput throttlin'Kill switches an' graceful degradationLesson 2Safe upgrade an' deployment strategies: immutable core vs upgradeable modules, upgrade governanceDis section explains safe deployment an' upgrade strategies, comparin' immutable cores an' upgradeable modules, definin' upgrade governance, testin' pipelines, an' rollback plans to minimize risk durin' contract changes.
Immutable core versus upgradeable modulesProxy patterns an' storage safetyUpgrade governance an' votin' flowsStagin', canary, an' phased rolloutsRollback, freezes, an' migration plansLesson 3Secure smart contract design patterns: checks-effects-interactions, pull-over-push, nonReentrant, circuit breakersDis section introduces core secure design patterns fi smart contracts, such as checks-effects-interactions, pull-over-push payments, nonReentrant guards, an' circuit breakers dat limit damage from bugs or attacks.
Checks-effects-interactions patternPull over push payment mechanismsReentrancy guards an' nonReentrantCircuit breakers an' emergency stopsAccess control an' capability patternsLesson 4Developer processes: code review checklists, pre-merge CI gates, dependency management, reproducible buildsDis section covers secure development processes, includin' code review checklists, pre-merge CI gates, dependency management, an' reproducible builds dat ensure consistent, auditable, an' tamper-resistant releases.
Security-focused code review checklistsPre-merge CI an' mandatory test gatesManagin' third-party dependenciesReproducible an' deterministic buildsRelease signin' an' artifact verificationLesson 5Key management an' operational hygiene: hardware wallets, threshold signatures, secret rotation policiesDis section covers secure key lifecycle management fi blockchain operations, includin' hardware wallets, threshold signatures, backup an' recovery, rotation policies, an' operational hygiene to prevent key theft, misuse, or accidental loss.
Hardware wallets fi operational signersThreshold an' MPC signin' architecturesSecure key backup an' recovery plansKey rotation an' revocation proceduresWorkstation an' network hygiene controlsLesson 6Documentation an' transparency: security disclosures, public parameters, bug bounty visibilityDis section describes how fi document security assumptions, public parameters, admin powers, an' upgrade policies, an' how fi run transparent bug bounties dat help users an' auditors understand an' trust de system.
Documentin' trust an' threat modelsPublishin' admin roles an' powersPublic parameters an' risk disclosuresBug bounty scope an' visibilityChangelogs an' user-fac'in' updatesLesson 7Monitorin' an' incident response: metrics to track, alert thresholds, playbooks, an' forensics preparationDis section details how fi monitor blockchain systems, define security an' reliability metrics, configure alert thresholds, prepare incident playbooks, an' collect forensic data to support rapid investigation an' effective postmortems.
Core security an' reliability metricsAlert thresholds an' escalation pathsIncident response playbook designOn-chain an' off-chain log collectionForensics readiness an' evidence handlin'Lesson 8Admin controls an' governance: multisig, timelocks, role separation, emergency pause proceduresDis section explains how fi design robust admin governance usin' multisig wallets, timelocks, role separation, an' emergency pause controls, reducin' single points of failure an' limitin' de blast radius of privileged actions.
Designin' secure multisig admin walletsConfigurin' timelocks fi critical actionsRole separation an' least privilege modelsEmergency pause an' circuit breaker runbooksDelegation, signers rotation, an' auditsLesson 9Oracle hardenin' controls: multi-source feeds, TWAP, oracle guardians, dispute windowsDis section focuses on hardenin' oracle designs usin' multi-source feeds, TWAP mechanisms, guardians, dispute windows, an' failover strategies to reduce manipulation risk an' ensure resilient, trustworthy price data.
Multi-source an' medianized price feedsTWAP an' liquidity-aware pricin'Oracle guardians an' kill switchesDispute windows an' challenge flowsFailover, liveness, an' stale data checksLesson 10Testin' an' QA best practices: deterministic tests, fuzz targets, simulated attacker testsDis section presents testin' an' QA strategies fi smart contracts, includin' deterministic unit tests, fuzzin', property-based tests, an' simulated attacker scenarios dat reveal edge cases an' security weaknesses.
Deterministic unit an' integration testsFuzzin' an' property-based testin'Simulated attacker an' chaos testsTest coverage an' invariant trackin'Test data, fixtures, an' environments