cccz

cccz

@thereksfour

100

Spearbit

sr

Public earnings

$66,307.23

43rd


Public findings

51


Achievements


Skillset

Self-reported

Admin verified

Account Abstraction & Wallets

Intents / SolversMultisig (Safe)Smart WalletsSocial Recovery

Blockchain Platforms (L1 + VM)

BitcoinEthereumEVMSolana

Consensus & Node Infra

Consensus (PoS / BFT)

Cross-Chain & Interoperability

Cross-Chain Bridges

Worked with

Lido
Coinbase
infiniFi
Kintsu
Foresight
Sorella Labs
Sujith S
Jonatas Martins
cergyk
Arno
Gerard Persoon
Chinmay Farkya

Biography

Senior Smart Contract Security Researcher
Code4rena #4 All-Time | 300+ Valid High/Medium Findings | Black Hat / DEFCON Speaker

I specialize in high-impact smart contract security reviews across DeFi, infrastructure, bridges, account abstraction, AMMs, lending, staking, oracles, RWA, stablecoins, and protocol-specific business logic.

Highlights

  • Ranked #4 on Code4rena's all-time leaderboard
  • $334K+ in Code4rena awards
  • 104 High and 215 Medium valid findings on Code4rena
  • 115+ projects helped secure on Code4rena
  • Private or managed reviews involving Coinbase, Lido, zkSync, Optimism, Uniswap, and other protocols

Public Competition Results

PlatformProjectPlacementPayout
Code4renaNouns DAO🥇 1st$31.7K
CantinaGoat Tech Smart-contracts🥇 1st$28.1K
Code4renaMaple Finance🥇 1st$21.5K
Code4renaLooksRare Aggregator🥇 1st$10.9K
Code4renaNFTX🥇 1st$10.7K
Code4renaRubicon v2🥇 1st$10.5K
Code4renaFEI and TRIBE Redemption🥈 2nd$18.9K
Code4renaAura Finance🥈 2nd$18.1K
Code4renaCanto🥈 2nd$11.6K
Code4renaJuicebox V2🥈 2nd$11.1K
Code4renaPaladin Warden Pledges🥈 2nd$5.7K
Code4renaBlur Exchange🥈 2nd$3.8K
Code4renaRubicon🥈 2nd$3.5K
CantinaBeraborrow Blockend🥉 3rd$7.7K
Code4renaLSD Network - Stakehouse🥉 3rd$5.1K
Code4renaOoki🥉 3rd$5.1K
Code4renaQuickSwap and StellaSwap🥉 3rd$4.9K
Code4renaFractional v2🥉 3rd$4.8K
Code4renaFrankencoin🥉 3rd$4.4K
Code4renaIlluminate🥉 3rd$3.6K
Code4renaCanto Identity Subprotocols🥉 3rd$3.3K

Background

Before focusing on smart contract security, I worked on browser and blockchain security research, including multiple Chrome vulnerabilities and a critical vulnerability in TRON. My research has been presented at Black Hat USA, Black Hat Europe, and DEFCON.

Review Focus

  • DeFi accounting and solvency invariants
  • Lending, liquidation, collateral, and oracle risks
  • AMMs, DEXs, liquidity routing, and pool accounting
  • Bridges, cross-chain assumptions, and account abstraction
  • Staking, rewards, vaults, RWA, stablecoins, and protocol-specific business logic
  • PoC-backed validation and actionable remediation guidance

Top competitions

View all
Contest
Position
Date
Payout
Smart-contracts

Smart-contracts

1

/ 65

March 2024$28,058
beraborrow-blockend

beraborrow-blockend

3

/ 5

February 2025$7,672
incentive-contracts

incentive-contracts

8

/ 41

January 2024$3,540
Euler-v2

Euler-v2

33

/ 70

May 2024$1,000
core-and-erc1155a

core-and-erc1155a

18

/ 50

November 2023$852

Private reviews

View all
Engagement
Project title
Timeframe
Researchers
Coinbase

Coinbase

Coinbase: SpendRouter

Mar 2026 - Mar 2026

cccz
0xRajeev
Coinbase

Coinbase

Coinbase - Spend Router PR 79

Mar 2026 - Mar 2026

cccz
0xRajeev
Lido

Lido

Lido PR 85 - Bytecode Verification

Mar 2026 - Mar 2026

cccz
Sujith S
Kintsu

Kintsu

Kintsu

Aug 2025 - Aug 2025

cccz
HickupHH3
infiniFi

infiniFi

infiniFi: PR 167

Jun 2025 - Jun 2025

cccz
r0bert

Security portfolio

Title
Description
Black Hat USA 2021 SpeakerPresented a critical vulnerability in TRON
DEFCON 29 speakerPresented a critical vulnerability in TRON
Black Hat Europe 2020 SpeakerPresenting an interesting chrome vulnerability
Code4renaRanked #4 on Code4rena's all-time leaderboard, with $330k+ in awards and 300+ valid High/Medium findings.