Bitcoin Basics
A Bitcoin change output can send the remainder back to your own wallet
Bitcoin spends transaction outputs rather than subtracting from a single account balance. A change output can return the remainder to a wallet-controlled address.
TOKENS · NETWORKS · CONTEXT
transactions
Transaction basics
A Blockchain Transaction Fee Pays for More Than the Amount Sent
Separate network fees from exchange charges and transaction value, and check the network’s rules before assuming a failed transfer costs nothing.
Blockchain Basics
What a Block Explorer Can Tell You About a Transaction
Read a transaction hash, network, status and fee in a block explorer while recognising what public on-chain data cannot prove.