Overview
Create another transaction with the same senders and amount, and increase the new transaction fee rate to make it confirmed first, and the original transaction will be discarded.You can double spend by changing the recipient or quantity. No service fee will be charged for unsuccessful double-spending.
Step 1: Enter the unconfirmed transaction hash or raw transaction (rawtx)
Step 2: Modify the receiving address or quantity.
The user modifies the receiving address or quantity of the transaction so that the same input of the original transaction is sent to the specified address.
Note: Available refers to the total input of the original transaction minus the service fee, which is currently 30,000 satoshis. The total receiving quantity should be less than the available quantity, because some needs to be reserved for network fee.
If the total receiving quantity is found to be greater than the available quantity, you can adjust the receiving quantity or delete a receiver to achieve this.
Step 3: Confirm Double-spending
Confirm relevant fees , and then click ‘Pay&Sign’
Step 4: Pay the service fee and Sign transaction
After the signed transaction is completed, the raw transaction (rawtx) of the new transaction can be broadcast to multiple nodes faster through the transaction broadcast tool (https://tools.btc.com/zh-CN/tools/broadcast), so that the transaction can be confirmed faster.
4.1 Choose QR code signature transaction
1. Select psbt code(popular) to sign transaction
The wallet address for payment & signature must be consistent with the address displayed in the QR code [marked in red box].Click ‘QR Code"’to enlarge the QR code.
Currently supported wallets:
Psbt: electrum, bluewallet, sparrow, ledger, trezor, keystone, etc.;
UR(crypto-psbt): electrum, bluewallet, sparrow, ledger, trezor, keystone, etc.;
Base43: electrum.
2. Sign transaction
Use the wallet to scan the QR code and then sign the transaction.
3. Broadcast the new transaction
After entering the rawtx of the new transaction, click ‘Broadcast Transaction’.
4. Transaction confirmation
After the signature transaction is completed, wait for confirmation on the chain. When this transaction confirmed on the chain , means we complete the service for you.
4.2 Google extension signature transaction
1. Choose google extension wallet(taking the BTC.com wallet as an example)
First, you need to install the Google extension wallet. The download url for the BTC.com wallet extension is:https://chromewebstore.google.com/detail/cloverpool-wallet/lakggbcodlaclcbbbepmkpdhbcomcgkd?hl=zh-CN&utm_source=ext_sidebar，Click "Connect Wallet".The wallet address for the authorized signature must be consistent with the address displayed on the page (marked in a red box).
Currently supported google extension wallets: BTC.com, Unisat, OKX, Xverse, Bitget, Leather, Phantom etc.
2. Sign transaction
Use the selected google extension wallet to sign the transaction. After the signature is successful, the status changes to Pending.
3. Transaction confirmation
After the signature transaction is completed, wait for confirmation on the chain. When this transaction confirmed on the chain , means we complete the service for you.