Generalize UTxO identifier type within UTxOIndex.
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jonathanknowles
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UTxOIndexUTxOIndex.
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Anviking
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Feb 23, 2022
| @@ -505,7 +508,7 @@ prop_selectRandom_one_withAdaOnly u = checkCoverage $ monadicIO $ do | |||
| -- This should only succeed if there is at least one element with a non-zero | |||
| -- quantity of the asset. | |||
| -- | |||
| prop_selectRandom_one_withAsset :: UTxOIndex -> AssetId -> Property | |||
| prop_selectRandom_one_withAsset :: UTxOIndex InputId -> AssetId -> Property | |||
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All these properties would work with any Ord i => UTxOIndex i right?
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All these properties would work with any Ord i => UTxOIndex i right?
Yes, precisely!
I haven't converted the test suites yet, but I'm thinking of making a simple TestUTxOKey type with generators and shrinkers for it.
I haven't done this yet, because I predict some effort (though not too much) with be required to maintain the coverage conditions.
| @@ -234,7 +234,7 @@ toList = fold (\ubs u b -> (u, b) : ubs) [] | |||
| -- Consider using 'fold' if your goal is to consume all entries in the output. | |||
| -- | |||
| toUTxO :: UTxOIndex u -> Map u TokenBundle | |||
| toUTxO = utxo | |||
| toUTxO = universe | |||
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utxos? allUTxOs? rawUTxO? Maybe universe is a bit too "dressed up"
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utxos?allUTxOs?rawUTxO? Maybeuniverseis a bit too dressed up
I take your point. 😄
How about everything?
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We use the following convention for identifier names:
- `u` represents a unique identifier for an individual UTxO (unspent
transaction output).
- `b` represents a `TokenBundle` value.
- `i` represents an index of type `UTxOIndex`.
The former field name was confusing because it overloaded the term "UTxO" (used elsewhere in the module to refer to a single UTxO) with the complete set of UTxOs in the index.
These names better reflect the types involved.
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Issue Number
ADP-1418
Summary
This PR adds the type parameter
uto theUTxOIndextype, to represent unique UTxO identifiers. The parameterucan be instantiated to any type for which there is anOrdinstance.Additional Work
This PR also:
UTxOIndexmodule to reflect theUTxOIndextype's generality.UTxOIndexaccording to the following scheme:-
urepresents a unique identifier for an individual UTxO (unspent transaction output).-
brepresents aTokenBundlevalue.-
irepresents an index of typeUTxOIndex.UTxOIndex.{to,from}UTxOtoUTxOIndex.{to,from}Map, since these functions really do produce and consume values of typeMap.utxoof typeUTxOIndextouniverse, to avoid overloading the termUTxO, which refers to a single unspent transaction output in this module.