Fomero
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Step 1 of 2: Enter your double spend details

Amount to send: btc (0.001 minimum)

First transaction

Send to address: (Victim/Target Wallet)
Fee: satos per byte (must be between 1 and 990)

Second transaction

Send to address: (Your Wallet for funds to return)
Fee: satos per byte (must be between 11 and 1000 and at least 10 higher than first transaction fee)

On the next screen you will fund and send your transactions.

First transaction recommended Fee: 1
Second transaction recommended Fee: 23
Recommended priority Fee: 79

Check mempool.space for Unconfirmed transactions. If they are under 3k, the chances of a successfully double spend are under 50%. You can still do it if u make it fast ;)
Unconfirmed transactions now: 4267
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