SigHashType.all constructor
      const
      SigHashType.all({ 
    
- bool anyOneCanPay = false,
Sign all of the outputs. If anyOneCanPay is true, then only the input
containing the signature will be signed.
If anyOneCanPay is false and a Taproot input is being signed, this will
be treated as "SIGHASH_DEFAULT".
Implementation
const SigHashType.all({ bool anyOneCanPay = false })
  : value = allValue | (anyOneCanPay ? anyOneCanPayFlag : 0);