54 lines
2.0 KiB
Go
54 lines
2.0 KiB
Go
package operations
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import (
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"math/rand"
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sdk "github.com/cosmos/cosmos-sdk/types"
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govsimops "github.com/cosmos/cosmos-sdk/x/gov/simulation/operations"
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govtypes "github.com/cosmos/cosmos-sdk/x/gov/types"
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"github.com/cosmos/cosmos-sdk/x/params"
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"github.com/cosmos/cosmos-sdk/x/simulation"
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)
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// SimulateParamChangeProposalContent returns random parameter change content.
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// It will generate a ParameterChangeProposal object with anywhere between 1 and
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// the total amount of defined parameters changes, all of which have random valid values.
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func SimulateParamChangeProposalContent(paramChangePool []simulation.ParamChange) govsimops.ContentSimulator {
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return func(r *rand.Rand, _ sdk.Context, _ []simulation.Account) govtypes.Content {
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lenParamChange := len(paramChangePool)
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if lenParamChange == 0 {
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panic("param changes array is empty")
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}
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numChanges := simulation.RandIntBetween(r, 1, lenParamChange)
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paramChanges := make([]params.ParamChange, numChanges, numChanges)
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// map from key to empty struct; used only for look-up of the keys of the
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// parameters that are already in the random set of changes.
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paramChangesKeys := make(map[string]struct{})
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for i := 0; i < numChanges; i++ {
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spc := paramChangePool[r.Intn(len(paramChangePool))]
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// do not include duplicate parameter changes for a given subspace/key
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_, ok := paramChangesKeys[spc.ComposedKey()]
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for ok {
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spc = paramChangePool[r.Intn(len(paramChangePool))]
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_, ok = paramChangesKeys[spc.ComposedKey()]
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}
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// add a new distinct parameter to the set of changes and register the key
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// to avoid further duplicates
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paramChangesKeys[spc.ComposedKey()] = struct{}{}
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paramChanges[i] = params.NewParamChangeWithSubkey(spc.Subspace, spc.Key, spc.Subkey, spc.SimValue(r))
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}
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return params.NewParameterChangeProposal(
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simulation.RandStringOfLength(r, 140), // title
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simulation.RandStringOfLength(r, 5000), // description
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paramChanges, // set of changes
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)
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}
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}
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