
blockchain-basics
Master blockchain fundamentals including consensus, cryptography, and distributed systems
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Install
Works with every agent the skills CLI supports.
npx skills add https://github.com/pluginagentmarketplace/custom-plugin-blockchain --skill blockchain-basics- 01
Install
Run the command in your project. The CLI asks which agents to install for.
- 02
Describe the task
Ask your agent for something this skill covers. It loads blockchain-basics automatically when relevant.
- 03
Review the result
The agent follows the SKILL.md steps, scripts and references bundled with the skill.
SKILL.md
The instructions your agent reads when the skill is triggered.
Blockchain Basics Skill
Master blockchain fundamentals including consensus mechanisms, cryptographic primitives, and distributed systems architecture.
Quick Start
# Invoke this skill for blockchain fundamentals
Skill("blockchain-basics", topic="consensus", depth="intermediate")
Topics Covered
1. Consensus Mechanisms
Learn how distributed networks achieve agreement:
- Proof of Work: Mining, hashrate, difficulty adjustment
- Proof of Stake: Validators, slashing, finality
- Byzantine Fault Tolerance: Leader election, view changes
2. Cryptographic Foundations
Understand the security primitives:
- Hash Functions: SHA-256, Keccak-256, properties
- Digital Signatures: ECDSA, Ed25519, verification
- Merkle Trees: Proof construction, verification
3. Network Architecture
Explore distributed systems:
- P2P Networks: Gossip protocols, peer discovery
- Node Types: Full nodes, light clients, archives
- Block Propagation: Compact blocks, relay networks
4. Transaction Lifecycle
Follow data through the chain:
- Transaction Structure: Inputs, outputs, signatures
- Mempool: Fee markets, ordering, priority
- Confirmation: Finality, reorganization
Code Examples
Verify Merkle Proof
import hashlib
def verify_merkle_proof(leaf: bytes, proof: list, root: bytes) -> bool:
"""Verify a Merkle proof for inclusion"""
current = leaf
for sibling, is_left in proof:
if is_left:
current = hashlib.sha256(sibling + current).digest()
else:
current = hashlib.sha256(current + sibling).digest()
return current == root
Calculate Block Hash
import hashlib
import struct
def calculate_block_hash(header: dict) -> bytes:
"""Calculate Bitcoin-style block hash"""
data = struct.pack(
'<I32s32sIII',
header['version'],
bytes.fromhex(header['prev_block']),
bytes.fromhex(header['merkle_root']),
header['timestamp'],
header['bits'],
header['nonce']
)
return hashlib.sha256(hashlib.sha256(data).digest()).digest()[::-1]
Common Pitfalls
| Pitfall | Issue | Solution |
|---|---|---|
| Finality confusion | PoW is probabilistic | Wait for 6+ confirmations |
| Hash vs encryption | Hashes are one-way | Use proper encryption for secrets |
| Timestamp trust | Miners can manipulate | Use block height for precision |
Troubleshooting
"Why is my transaction not confirming?"
- Check transaction fee vs current mempool
- Verify nonce is sequential (no gaps)
- Ensure sufficient balance for amount + gas
"How do I verify a signature?"
from eth_account import Account
from eth_account.messages import encode_defunct
message = encode_defunct(text="Hello")
address = Account.recover_message(message, signature=sig)
Learning Path
[Beginner] → Hash Functions → Digital Signatures → Transactions
↓
[Intermediate] → Merkle Trees → Consensus → Network Layer
↓
[Advanced] → BFT Protocols → Sharding → Cross-chain
Test Yourself
# Unit test template
def test_merkle_root():
txs = [b"tx1", b"tx2", b"tx3", b"tx4"]
root = build_merkle_root(txs)
assert len(root) == 32
assert verify_merkle_proof(txs[0], get_proof(0), root)
Cross-References
- Bonded Agent:
01-blockchain-fundamentals - Related Skills:
ethereum-development,smart-contract-security
Version History
| Version | Date | Changes |
|---|---|---|
| 2.0.0 | 2025-01 | Production-grade with validation, examples |
| 1.0.0 | 2024-12 | Initial release |
FAQ
What does the blockchain-basics skill do?
Master blockchain fundamentals including consensus, cryptography, and distributed systems
How do I install blockchain-basics?
Run npx skills add https://github.com/pluginagentmarketplace/custom-plugin-blockchain --skill blockchain-basics in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/blockchain-basics/ (personal) or .claude/skills/blockchain-basics/ (project).
Which AI agents can use blockchain-basics?
Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.
Is blockchain-basics safe to install?
No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.
Who maintains blockchain-basics?
It is published by pluginagentmarketplace in pluginagentmarketplace/custom-plugin-blockchain. It has 54 recorded installs.
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