Merkelized Alternative Script Tree (MAST)
A Merkelized Alternative Script Tree (MAST) is a proposal to encapsulate an arbitrary number of different scripts in a Bitcoin address.
A Merkelized Alternative Script Tree (MAST) is a proposal to encapsulate an arbitrary number of different scripts in a Bitcoin address. The concept is now part of the Taproot upgrade. MAST expands the flexibility and utility of Bitcoin contracts in an inexpensive and privacy preserving way.
The original proposal for the concept of MAST was named Merkelized Abstract Syntax Tree. However, since the current version of the proposal no longer implements abstract syntax trees, the name was changed in 2018. In order to avoid taking up large amounts of space by including many scripts in a transaction, a Merkle tree is used to summarize the collection of possible spending scripts.
In this way, MAST is similar to a P2SH script, except that the script hash of a MAST transaction represents multiple scripts. When bitcoin is sent to a MAST output, the bitcoin is technically locked to the Merkle root of these scripts. To spend the bitcoin, the spender must reveal the script which they are using to unlock the bitcoin,as well as proof that this script is included in the Merkle root of the previous transaction.
The privacy and efficiency improvements come from the fact that the spender of a MAST output need not reveal all of the scripts, only the one they used.
Merkelized Alternative Script Tree (MAST) is a Bitcoin protocol specification that defines technical standards for how Bitcoin software operates. Onramp's Bitcoin glossary provides detailed educational resources on Merkelized Alternative Script Tree (MAST) and other protocol-level concepts to help investors understand the technology underpinning their Bitcoin holdings.
Frequently Asked Questions
What is Merkelized Alternative Script Tree (MAST)?
Merkelized Alternative Script Tree (MAST) is a technical standard in the Bitcoin protocol that specifies how certain operations or data structures should be implemented. It helps ensure interoperability between different Bitcoin software implementations.
Why is Merkelized Alternative Script Tree (MAST) important for Bitcoin?
Merkelized Alternative Script Tree (MAST) improves Bitcoin's functionality, security, or efficiency. Technical standards like this ensure that all participants in the Bitcoin network follow consistent rules, maintaining network consensus.
How does Merkelized Alternative Script Tree (MAST) affect Bitcoin investors?
While Merkelized Alternative Script Tree (MAST) operates at the protocol level, Onramp ensures that clients benefit from these technical improvements through secure, up-to-date infrastructure for Bitcoin custody and transactions.
