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Canton SDK/Splice Daml Models splice-amulet docs Splice.Amulet.CryptoHash

Splice.Amulet.CryptoHash

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Splice.Amulet.CryptoHash

Utilities to compute cryptographic hashes of Daml data structures. We use this for computing compact commitments for reflecting off-ledger data shared by the SV nodes on-ledger.

Note that the hashes are based on viewing all scalar values as strings and taking a structural view of Daml records; i.e., the hashes do not include a unique type tag by default. Make sure to include a type tag using hashVariant if you want to hash different data structures in the same scope.

Typeclasses

class Hashable a where

hash

: a -> Hash

instance Hashable Hash

instance Hashable Batch

instance Hashable MintingAllowance

instance Hashable Decimal

instance Hashable Int

instance Hashable Text

instance Hashable Party

instance Hashable a => Hashable (Optional a)

instance Hashable a => Hashable [a]

Data Types

data Hash

Hash

Field

Type

Description

value

Text

instance Hashable Hash

instance Eq Hash

instance Show Hash

instance GetField "batchHash" ProcessRewardsV2 Hash

instance GetField "batchHash" AmuletRules_StartProcessingRewardsV2 Hash

instance GetField "value" Hash Text

instance SetField "batchHash" ProcessRewardsV2 Hash

instance SetField "batchHash" AmuletRules_StartProcessingRewardsV2 Hash

instance SetField "value" Hash Text

Functions

hashRecord

: [Hash] -> Hash

Compute the hash of a record.

hashUpgradedRecord

: [Hash] -> [Optional Hash] -> Hash

Compute the hash of an upgraded record so that it agrees with the old record hash when ignoring trailing None fields.

hashVariant

: Text -> [Hash] -> Hash

Compute the hash of a variant.

hashUpgradedVariant

: Text -> [Hash] -> [Optional Hash] -> Hash

Compute the hash of an upgraded variant so that it agrees with the old variant hash when ignoring trailing None fields.

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