54 lines
1.8 KiB
Go
54 lines
1.8 KiB
Go
package simulation
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import (
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"fmt"
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"math/rand"
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sdk "github.com/cosmos/cosmos-sdk/types"
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"github.com/cosmos/cosmos-sdk/types/simulation"
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"github.com/cosmos/cosmos-sdk/x/params/types/proposal"
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)
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func min(a int, b int) int {
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if a <= b {
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return a
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}
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return b
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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) simulation.ContentSimulatorFn {
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numProposals := 0
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// Bound the maximum number of simultaneous parameter changes
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maxSimultaneousParamChanges := min(len(paramChangePool), 1000)
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if maxSimultaneousParamChanges == 0 {
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panic("param changes array is empty")
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}
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return func(r *rand.Rand, _ sdk.Context, _ []simulation.Account) simulation.Content {
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numChanges := simulation.RandIntBetween(r, 1, maxSimultaneousParamChanges)
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paramChanges := make([]proposal.ParamChange, numChanges)
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// perm here takes at most len(paramChangePool) calls to random
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paramChoices := r.Perm(len(paramChangePool))
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for i := 0; i < numChanges; i++ {
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spc := paramChangePool[paramChoices[i]]
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// add a new distinct parameter to the set of changes
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paramChanges[i] = proposal.NewParamChange(spc.Subspace(), spc.Key(), spc.SimValue()(r))
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}
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title := fmt.Sprintf("title from SimulateParamChangeProposalContent-%d", numProposals)
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desc := fmt.Sprintf("desc from SimulateParamChangeProposalContent-%d. Random short desc: %s",
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numProposals, simulation.RandStringOfLength(r, 20))
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numProposals++
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return proposal.NewParameterChangeProposal(
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title, // title
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desc, // 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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