descriptor: Implement wallet-policies BIP#369

Merged

jgriffiths merged 25 commits intomasterfrom

wallet_policies

Sep 25, 2023

Commits on Sep 7, 2023

descriptor-policy: initial implementation of wallet-policies
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descriptor-policy: ensure policy key expressions are unique
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descriptor-policy: ensure at least one policy key is present
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descriptor-policy: ensure key ordering is sequential
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descriptor: store and expose the number of keys in a descriptor
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descriptor-policy: ensure all policy keys are substituted key expressions
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descriptor-policy: disallow mixed cardinality key expressions
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descriptor-policy: disallow solved cardinalities other than 1 and 2
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Commits on Sep 11, 2023