Glossary

Redeem Script

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A RedeemScript is the script used to unlock bitcoin sent to a P2SH or P2WSH address. In a P2SH or P2WSH transaction, bitcoin is locked to the hash of a RedeemScript, ensuring that only someone who can reproduce the RedeemScript and add any required signatures can spend the bitcoin. Redeem scripts most commonly entail multisig scripts or wrapped SegWit scripts.

Related Terms
Pay-to-Script-Hash (P2SH)
Pay-to-Script-Hash (P2SH) is a type of transaction which allows for the spending of bitcoin based on the satisfaction of any script provided by the sender. P2SH is used for multisig and SegWit transactions.
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Pay-to-Witness-Script-Hash (P2WSH)
A Pay-to-Witness-Script-Hash (P2WSH) is a type of transaction similar to a P2SH transaction in most ways, except that it uses SegWit.
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Bitcoin Script
Script is the language Bitcoin uses to determine who can spend a given piece of bitcoin (a UTXO). Script is intentionally limited in order to maintain Bitcoin's simplicity and ensure that any individual can run a node and validate the blockchain.
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Multisig
Bitcoin can be sent to an address such that spending that bitcoin requires multiple signatures from different private keys. This setup allows joint custody of funds, and can be as simple or as complex as needed.
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