Swap Transfer Rules
STEP 1.\ Seller signs 2nd input containing the NFT Atomical 7771 and 2nd output to receive 4000 Satoshis.\ Signing with SIGHASH_SINGLE | ANYONECANPAY allows the buyer to add additional inputs for funding and their receive address for where to receive the NFT
\ STEP 2.\ Buyer adds funding input at 1st input and adds first output to receive the NFT Atomical 7771 value. Signing with SIGHASH_ALL commits the buyer to all inputs and outputs.
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