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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,51 +1,53 @@ | ||
| package simulation | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "math/rand" | ||
|
|
||
| sdk "github.com/cosmos/cosmos-sdk/types" | ||
| "github.com/cosmos/cosmos-sdk/types/simulation" | ||
| "github.com/cosmos/cosmos-sdk/x/params/types/proposal" | ||
| ) | ||
|
|
||
| func min(a int, b int) int { | ||
| if a <= b { | ||
| return a | ||
| } | ||
| return b | ||
| } | ||
|
|
||
| // SimulateParamChangeProposalContent returns random parameter change content. | ||
| // It will generate a ParameterChangeProposal object with anywhere between 1 and | ||
| // the total amount of defined parameters changes, all of which have random valid values. | ||
| func SimulateParamChangeProposalContent(paramChangePool []simulation.ParamChange) simulation.ContentSimulatorFn { | ||
| return func(r *rand.Rand, _ sdk.Context, _ []simulation.Account) simulation.Content { | ||
|
|
||
| lenParamChange := len(paramChangePool) | ||
| if lenParamChange == 0 { | ||
| panic("param changes array is empty") | ||
| } | ||
| numProposals := 0 | ||
| // Bound the maximum number of simultaneous parameter changes | ||
| maxSimultaneousParamChanges := min(len(paramChangePool), 1000) | ||
| if maxSimultaneousParamChanges == 0 { | ||
| panic("param changes array is empty") | ||
| } | ||
|
|
||
| numChanges := simulation.RandIntBetween(r, 1, lenParamChange) | ||
| return func(r *rand.Rand, _ sdk.Context, _ []simulation.Account) simulation.Content { | ||
| numChanges := simulation.RandIntBetween(r, 1, maxSimultaneousParamChanges) | ||
| paramChanges := make([]proposal.ParamChange, numChanges) | ||
|
|
||
| // map from key to empty struct; used only for look-up of the keys of the | ||
| // parameters that are already in the random set of changes. | ||
| paramChangesKeys := make(map[string]struct{}) | ||
| // perm here takes at most len(paramChangePool) calls to random | ||
| paramChoices := r.Perm(len(paramChangePool)) | ||
|
|
||
| for i := 0; i < numChanges; i++ { | ||
| spc := paramChangePool[r.Intn(len(paramChangePool))] | ||
|
|
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| // do not include duplicate parameter changes for a given subspace/key | ||
| _, ok := paramChangesKeys[spc.ComposedKey()] | ||
| for ok { | ||
| spc = paramChangePool[r.Intn(len(paramChangePool))] | ||
| _, ok = paramChangesKeys[spc.ComposedKey()] | ||
| } | ||
|
|
||
| // add a new distinct parameter to the set of changes and register the key | ||
| // to avoid further duplicates | ||
| paramChangesKeys[spc.ComposedKey()] = struct{}{} | ||
| spc := paramChangePool[paramChoices[i]] | ||
| // add a new distinct parameter to the set of changes | ||
| paramChanges[i] = proposal.NewParamChange(spc.Subspace(), spc.Key(), spc.SimValue()(r)) | ||
| } | ||
|
|
||
| title := fmt.Sprintf("title from SimulateParamChangeProposalContent-%d", numProposals) | ||
| desc := fmt.Sprintf("desc from SimulateParamChangeProposalContent-%d. Random short desc: %s", | ||
| numProposals, simulation.RandStringOfLength(r, 20)) | ||
| numProposals++ | ||
| return proposal.NewParameterChangeProposal( | ||
| simulation.RandStringOfLength(r, 140), // title | ||
| simulation.RandStringOfLength(r, 5000), // description | ||
| paramChanges, // set of changes | ||
| title, // title | ||
| desc, // description | ||
| paramChanges, // set of changes | ||
| ) | ||
| } | ||
| } |
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