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## BIP322_for_Signing_Devices.md

      
        
          
            
              
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                orangesurf
                / BIP322_for_Signing_Devices.md
            
            
              Last active
              February 12, 2026 21:44
            
          
        
      
        

      
      
    BIP322 Message Verification for Signing Devices

A proposal for displaying human-readable messages on hardware signing devices during BIP322 signature operations.
Problem

BIP322 defines a generic message signing format using virtual Bitcoin transactions. The message is reduced to a 32-byte hash (message_hash) embedded in the to_spend transaction's scriptSig:
vin[0].scriptSig = OP_0 PUSH32[ message_hash ]