Transactions and Fees
11 posts
- 1Intermediate
Understanding the UTXO Model
Understand Bitcoin's UTXO (Unspent Transaction Output) model through hands-on examples. Compare it with Ethereum's account model and learn how UTXO selection affects transaction fees.
- 2Beginner
What Is a Bitcoin Wallet Address?
A complete guide to Bitcoin wallet addresses: how they are generated, the different address types (P2PKH, P2SH, SegWit, Taproot), and best practices for safe use.
- 3Beginner
What Is a TXID?
The definition of a Bitcoin Transaction ID (TXID), how it is generated, real-world examples, the malleability problem, and how SegWit solved it. Understanding TXIDs is the key to tracking Bitcoin transactions.
- 4Beginner
How to Read a Bitcoin Transaction
Learn how to break down and read the internal structure of a Bitcoin transaction. Interpret the version, inputs, outputs, and locktime fields one by one, understand fee calculation and what confirmations mean, then practice by looking up a real transaction on txid.uk.
- 5
Checking for Yourself That Bitcoin Actually Arrived
Learn how to verify Bitcoin transactions step by step - from using block explorers and understanding txid to running your own full node for trustless verification.
- 6Intermediate
What Is the Mempool?
How the mempool works: the waiting room for Bitcoin transactions before they are included in a block. Covers each node's independent mempool, miner transaction selection, fee competition, RBF and CPFP, and the risks of zero-confirmation transactions.
- 7Intermediate
Why Bitcoin Fees Suddenly Spike Out of Nowhere
A practical and technical guide to Bitcoin mempool congestion - what causes fee spikes, how to read mempool visualizations, fee estimation strategies, CPFP, RBF, and Lightning as a congestion escape.
- 8Intermediate
Why Bitcoin Fees Cost 10 Cents One Day and 10 Dollars the Next
Learn the real mechanics of Bitcoin transaction fees with practical examples. Covers sat/vbyte units, virtual byte calculation, how to estimate the right fee, and strategies to avoid overpaying.
- 9Beginner
I Sent Bitcoin and It Never Arrived
Bitcoin transaction stuck and unconfirmed? Fix it now with broadcast tools, Replace-By-Fee (RBF), CPFP, and TXID lookup. Step-by-step guide to unstick your Bitcoin TX from the mempool.
- 10Beginner
How to Broadcast a Bitcoin Transaction
Step-by-step guide to broadcasting a raw Bitcoin transaction using online tools, Bitcoin Core, and block explorers. Includes fixes for stuck and unconfirmed transactions.
- 11Intermediate
A Hardware Wallet Demands the Whole Previous Transaction
The format that makes air-gapped wallets and multisig actually work. The six roles of BIP-174, what a signing device is required to verify, the attack that lies to offline devices about the fee, and how Taproot ended it.