Academy Lesson mempool

Summary

-local cache of valid but unconfirmed transactions.

Security Notes

No security notes for this node yet.

Node Security Panel

Vulnerabilities (1)

Pre-SegWit Transaction Malleability

Attacks (4)

Assumptions (2)

Policy vs Consensus (0)

Graph Neighbors

Direction	Relation	Node
Outgoing	DEPENDS_ON	Transaction
Incoming	DEPENDS_ON	Mining (Lesson Anchor)
Incoming	STRENGTHENS	Fee Rate
Incoming	PART_OF	Replace-by-Fee (RBF)
Incoming	POLICY_ONLY	Replace-by-Fee (RBF)
Incoming	PART_OF	Child Pays For Parent (CPFP)
Incoming	EXPLOITS	Double Spend

Related Nodes

Knowledge Check

Question 1 of 3

What happens to a transaction in the mempool if its fee relies on unconfirmed parents?

Journey Progress

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Lesson 1/80% complete

This node is not part of the guided sequence.

Node status: Not completed

Current Guided Lesson

What is Bitcoin?

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Open Home Journey

Glossary

Hover the headers for quick tooltips, then read the short canonical distinction.

Pseudonymity vs Anonymity

Bitcoin is pseudonymous: addresses are public identifiers without built-in real names, but flows can still be traced and clustered.

Nodes vs Miners

Nodes enforce consensus rules by validating blocks/transactions. Miners order transactions into blocks and compete in proof-of-work.

Wallets vs Keys

Wallets store and manage cryptographic keys used to sign spends. The bitcoin itself exists as UTXOs on the blockchain state.

Base Layer vs Lightning

Bitcoin base layer optimizes final settlement and security. Lightning optimizes speed and cost for day-to-day payment flow.

Bitcoin Academy Learning Paths

Structured concept nodes connect blocks, transactions, mempool policy, mining incentives, and security models into guided journeys you can resume anytime.

Each node links to live explorer modules and labs so theory maps directly to observable mainnet behavior.

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