63 lines
1.7 KiB
Go
63 lines
1.7 KiB
Go
package indexes
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import (
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"testing"
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"cosmossdk.io/collections"
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"github.com/stretchr/testify/require"
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)
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type (
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Address = string
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Denom = string
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Amount = uint64
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)
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// our balance index, allows us to efficiently create an index between the key that maps
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// balances which is a collections.Pair[Address, Denom] and the Denom.
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type balanceIndex struct {
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Denom *ReversePair[Address, Denom, Amount]
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}
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func (b balanceIndex) IndexesList() []collections.Index[collections.Pair[Address, Denom], Amount] {
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return []collections.Index[collections.Pair[Address, Denom], Amount]{b.Denom}
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}
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func TestReversePair(t *testing.T) {
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sk, ctx := deps()
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sb := collections.NewSchemaBuilder(sk)
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// we create an indexed map that maps balances, which are saved as
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// key: Pair[Address, Denom]
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// value: Amount
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keyCodec := collections.PairKeyCodec(collections.StringKey, collections.StringKey)
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indexedMap := collections.NewIndexedMap(
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sb,
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collections.NewPrefix("balances"), "balances",
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keyCodec,
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collections.Uint64Value,
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balanceIndex{
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Denom: NewReversePair[Amount](sb, collections.NewPrefix("denom_index"), "denom_index", keyCodec),
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},
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)
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err := indexedMap.Set(ctx, collections.Join("address1", "atom"), 100)
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require.NoError(t, err)
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err = indexedMap.Set(ctx, collections.Join("address1", "osmo"), 200)
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require.NoError(t, err)
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err = indexedMap.Set(ctx, collections.Join("address2", "osmo"), 300)
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require.NoError(t, err)
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// assert if we iterate over osmo we find address1 and address2
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iter, err := indexedMap.Indexes.Denom.MatchExact(ctx, "osmo")
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require.NoError(t, err)
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defer iter.Close()
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pks, err := iter.PrimaryKeys()
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require.NoError(t, err)
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require.Equal(t, "address1", pks[0].K1())
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require.Equal(t, "address2", pks[1].K1())
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}
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