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Josh Green
9 lines
921 B
Markdown
9 lines
921 B
Markdown
# Unlocking Script
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An unlocking script is a [Script](/protocol/blockchain/script) that is used to prove that a transaction is permitted to spend a given UTXO.
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This is accomplished by first executing the unlocking script and then executing the [locking script](/protocol/blockchain/transaction/locking-script) for the UTXO referenced by the transaction input.
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If this execution triggers no failures and leaves a single non-zero (TRUE) value on the stack, the UTXO has been successfully unlocked.
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One way to look at this is that the unlocking script provides an initial state that acts as an inverse to the previously published locking script.
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For more information about how script execution works, see [Script](/protocol/blockchain/script). For information on how signatures (which typically go in the unlocking script) are generated, see [Transaction Signatures](/protocol/blockchain/transaction/transaction-signing).
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