Signature Hash ALL

• The signature hash marker determines which inputs and outputs of the transaction are endorsed.

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• The inputs & outputs of the transaction which are not endorsed can be modified after the endorsement is built.

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• Sighash ALL (0x01)
• Endorses/Signs all inputs and outputs of transaction
• Endorsement becomes invalid if these are modifed.
• The serialised transaction sets other input scripts and sequences to 0.

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Signature Hash NONE

• Sighash NONE (0x02)
• Endorses none of the outputs.
• Outputs can be modified anytime after the endorsement is built.
• The serialised transaction sets other input scripts and sequences to 0.
• The serialised transaction sets outputs to 0.

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Signature Hash SINGLE

• Sighash SINGLE (0x03)
• Endorses all inputs and single output of the same index.
• Non-endorsed outputs can be modified anytime after the endorsement is built.
• The serialised transaction sets other input scripts and sequences to 0.
• The serialised transaction sets non-endorsed output fields to 0.

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Signature Hash ANYONECANPAY

• ANYONECANPAY is a sighash modifier, which is set to modify any of sighash types ALL|NONE|SINGLE.

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• It allows all other inputs to be modified.

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• It is applied to the marker: Sighash Byte|0x80

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• For example:
• Sighash ALL|ANYONECANPAY (0x81)
• Endorses/Signs single input and all outputs of transaction
• The serialised transaction only includes single input, but all outputs.

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