比特幣交易如何運作
📖 6 min read
Quick Answer
When you send Bitcoin, you are not "moving" a coin like a file. You are signing a message that consumes some of your previous received amounts and creates new ones for the recipient. Here is exactly what happens in the few seconds and minutes after you hit send.
💡 Think of it as…
Paying with cash. To pay 7 dollars you hand over a 10-dollar bill (an input) and get 3 back as change (an output to yourself). Bitcoin works the same way — you spend whole chunks and receive change.
輸入和輸出
Your wallet gathers "inputs" (coins you previously received) and creates "outputs" (the amount to the recipient, plus change back to you). The difference between inputs and outputs is the miner fee.
The mempool
簽署並廣播後，交易會在記憶體池中等待－記憶體池是未確認交易的保存區域。礦工從這裡選擇交易，通常傾向於那些支付更高每位元組費用的交易。
Confirmation
When a miner includes your transaction in a block, it gets its first confirmation. Each new block on top adds another. After a few confirmations the payment is effectively irreversible.
🔑 Key takeaway
一筆交易花費以前的輸出並創建新的輸出，在記憶體池中等待，然後一旦被挖掘到一個區塊中就變得永久。費用可以讓您更快得到確認。
Why this matters for you
Understanding fees and confirmations helps you avoid overpaying when sending remittances or moving funds between exchanges like Bitkub, WazirX or Indodax — and explains why the Lightning Network exists for instant, near-free small payments.
常见问题
Why is my transaction stuck or pending?▼
It is likely waiting in the mempool with a fee too low for current demand. You can wait for traffic to drop, or use fee-bumping features (RBF or CPFP) if your wallet supports them.
我可以取消比特幣交易嗎？▼
Once confirmed, no. While unconfirmed, some wallets let you replace it with a higher-fee version (Replace-By-Fee). Always double-check the address before sending.
Why are fees sometimes high?▼
塊空間是有限的。當許多人同時進行交易時，他們會出更高的費用以更快地進入。費用隨需求而上升或下降。