02-22-2025 
OP_CAT
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3 September, 2024
Efficient multi-input transaction grinding for OP_CAT Bitcoin covenants
sCrypt previously implemented Bitcoin covenants using OP_CAT, based on this Schnorr trick, which they say can greatly simplify signature calculation...
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8 July, 2024
Bitcoin OP_CAT use cases series #4: Recursive covenants
A recursive covenant applies to the immediate transaction and subsequent transactions that spend the bitcoins, meaning the imposed conditions could...
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2 July, 2024
Bitcoin OP_CAT use cases series #3: Vaults
Following our series #1 and #2, sCrypt demonstrates how to construct non-custodial vaults to provide enhanced security for stored bitcoins.
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25 June, 2024
Bitcoin OP_CAT Use Cases Series #2: Merkle Trees
In this article, sCrypt enumerates the numerous applications for Merkle trees and how the OP_CAT opcode can be utilized to...
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28 May, 2024
Trustless Ordinal sales using OP_CAT-enabled covenants on Bitcoin
In this piece, sCrypt demonstrates a trustless sale of an Ordinal NFT using a layer-1 covenant made possible by re-enabling...
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