Looking at a Bitcoin transaction in a mempool explorer can feel overwhelming. There are timestamps, virtual sizes, strange fee rates, and technical fields like nSequence and Witness. But don’t worry — it’s all easier than it looks.
At wmiran.com, we believe understanding how Bitcoin transactions are built and confirmed helps users make smarter, faster, and safer swaps. Let’s break down the key parameters you’ll see in a mempool explorer — using plain language.
Timestamp
Example: 2025-04-19 18:29:32
This shows the exact time the transaction was first seen in the mempool — Bitcoin’s waiting area before confirmation.
Confirmed
Example: After 15 minutes
This tells you how long the transaction stayed in the mempool before being included in a block. Faster fee = faster confirmation.
Features: SegWit, Taproot, RBF
- SegWit: Saves space and lowers fees
- Taproot: Increases privacy and smart contract ability
- RBF: Lets you re-send the transaction with a higher fee
Audit: Expected in Block
Means it’s likely to be confirmed soon based on network status.
Batch Payment
This transaction sends BTC to multiple recipients at once — efficient and fee-saving.
Fee and Fee Rate
Fee: 1,100 sats ($0.93)
Fee Rate: 4.71 sat/vB — paid 2x more than required
At wmiran.com, we recommend using mempool.space to check fees before sending.
Miner
Example: Foundry USA — the pool that mined the transaction’s block.
Inputs & Outputs
Inputs = source of BTC
Outputs = where the BTC is going
Every transaction pulls BTC from previous ones and creates new destinations.
Witness
Contains digital signatures. SegWit keeps them separate to save space.
nSequence
Allows rеplace-by-Fee or time-based locking of transactions.
Previous Output Type
Example: V0_P2WPKH (SegWit native type)
ScriptPubKey (ASM & HEX)
The locking sсript that defines spending conditions, shown in readable and hexadecimal formats.
Size, Virtual Size, Weight
- Size: Full byte size
- vSize: Affects fees
- Weight: Used to calculate space in a block
Version & Locktime
Version: Format version of the transaction (usually 2)
Locktime: The block number when it can be confirmed (e.g., 892,740)
Sigops
Number of signature operations — technical but mostly irrelevant for everyday users.
Transaction Hex
The raw code of the transaction — how it looks under the hood for broadcasting or debugging.
Final Thoughts
Understanding mempool parameters gives you more control. You can track delays, avoid overpaying, and troubleshoot issues fast.
At wmiran.com, we believe informed users are empowered users — and knowing how mempool explorers work makes you better at handling Bitcoin the smart way.
