Bitcoin Universe · Model 01

The life of a transaction

Follow one payment along the workbench, from the coins in a wallet to a block buried under confirmations. Every number is exact satoshi arithmetic; the wallet, network and mempool are simulated.

Simulated data

Station 1 of 6

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Payment

Amount to pay (sat)

Fee rate (sat/vB)

The example pays 120,000 sat at 12 sat/vB. Switch to Explore to change the amount and the fee.

Inside the transaction

Your transaction, its fee and its block Inputs and the payment output Change output Simulated data

Column heights on the carriage are to scale with the wallet's coins, except the orange fee band, which is drawn thicker than true scale so it stays visible; the exact fee is in the readout. Wallet coins, identifiers, signatures, peers and the mempool backlog are simulated, and time is accelerated: a real block takes about ten minutes on average. Coin selection is a simple demonstration policy; real wallets use more sophisticated ones. The waiting estimate assumes no new transactions arrive.