# minaminao/ctf-blockchain

A summary and solutions for 200+ CTF blockchain challenges

Repository: https://github.com/minaminao/ctf-blockchain
Canonical: https://ross.abutalabs.com/products/ctf-blockchain
Language: Solidity
License Family: other
Topics: ctf, blockchain, ethereum, solidity, evm
Last push: 2025-10-09T22:51:54+00:00

## Health v2 (maintenance only)
Score: 53/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 46, release rhythm 35, longevity 100
- inputs: {"age_days": 1729, "days_push": 328, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1092, forks 84 (observed 2026-08-28T04:03:33.354808+00:00)

## What it is
A curated collection of 200+ blockchain CTF challenges and wargames with categorized writeups and solutions, focused on Ethereum, Solidity, and the EVM. It organizes challenges by vulnerability topic such as reentrancy, oracle manipulation, and delegatecall storage collisions.

## Use cases
- learn blockchain ctf challenges
- study solidity smart contract vulnerabilities
- prepare for paradigm ctf
- find writeups for evm puzzles
- practice ethereum security wargames
- learn reentrancy and flash loan attacks

## When to choose
- you are preparing for blockchain CTF competitions
- you want categorized examples of EVM and Solidity attack techniques
- you want writeups with working Solidity solutions

## When to avoid
- you need production smart contract auditing tools
- you want a structured beginner course rather than challenge writeups
- you need non-Ethereum blockchain content

## Facets
- artifact type: learning-resource
- maturity: active
- function: security, cryptography, developer-tools
- domain: blockchain, security, education, tutorials
- platform: cross-platform
- tags: ctf, solidity, ethereum, evm, writeups, wargames, smart-contract-security

## Member repositories
- minaminao/ctf-blockchain (main) score 53

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:03:33.354808+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T06:49:03.111789+00:00, confidence not recorded.
  - readme: https://github.com/minaminao/ctf-blockchain (fetched 2026-08-28T04:03:33.354808+00:00, sha 36f200f9d5de)
- Data as of 2026-08-30T08:39:29.467469+00:00.