490 lines
14 KiB
Go
490 lines
14 KiB
Go
package simulation
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import (
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"errors"
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"fmt"
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"math/rand"
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"github.com/cosmos/cosmos-sdk/baseapp"
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"github.com/cosmos/cosmos-sdk/codec"
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"github.com/cosmos/cosmos-sdk/simapp/helpers"
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simappparams "github.com/cosmos/cosmos-sdk/simapp/params"
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sdk "github.com/cosmos/cosmos-sdk/types"
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"github.com/cosmos/cosmos-sdk/x/simulation"
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"github.com/cosmos/cosmos-sdk/x/staking/keeper"
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"github.com/cosmos/cosmos-sdk/x/staking/types"
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)
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// Simulation operation weights constants
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const (
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OpWeightMsgCreateValidator = "op_weight_msg_create_validator"
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OpWeightMsgEditValidator = "op_weight_msg_edit_validator"
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OpWeightMsgDelegate = "op_weight_msg_delegate"
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OpWeightMsgUndelegate = "op_weight_msg_undelegate"
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OpWeightMsgBeginRedelegate = "op_weight_msg_begin_redelegate"
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)
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// WeightedOperations returns all the operations from the module with their respective weights
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func WeightedOperations(
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appParams simulation.AppParams, cdc *codec.Codec, ak types.AccountKeeper,
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k keeper.Keeper,
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) simulation.WeightedOperations {
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var (
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weightMsgCreateValidator int
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weightMsgEditValidator int
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weightMsgDelegate int
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weightMsgUndelegate int
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weightMsgBeginRedelegate int
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)
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appParams.GetOrGenerate(cdc, OpWeightMsgCreateValidator, &weightMsgCreateValidator, nil,
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func(_ *rand.Rand) {
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weightMsgCreateValidator = simappparams.DefaultWeightMsgCreateValidator
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},
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)
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appParams.GetOrGenerate(cdc, OpWeightMsgEditValidator, &weightMsgEditValidator, nil,
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func(_ *rand.Rand) {
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weightMsgEditValidator = simappparams.DefaultWeightMsgEditValidator
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},
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)
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appParams.GetOrGenerate(cdc, OpWeightMsgDelegate, &weightMsgDelegate, nil,
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func(_ *rand.Rand) {
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weightMsgDelegate = simappparams.DefaultWeightMsgDelegate
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},
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)
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appParams.GetOrGenerate(cdc, OpWeightMsgUndelegate, &weightMsgUndelegate, nil,
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func(_ *rand.Rand) {
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weightMsgUndelegate = simappparams.DefaultWeightMsgUndelegate
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},
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)
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appParams.GetOrGenerate(cdc, OpWeightMsgBeginRedelegate, &weightMsgBeginRedelegate, nil,
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func(_ *rand.Rand) {
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weightMsgBeginRedelegate = simappparams.DefaultWeightMsgBeginRedelegate
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},
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)
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return simulation.WeightedOperations{
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simulation.NewWeightedOperation(
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weightMsgCreateValidator,
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SimulateMsgCreateValidator(ak, k),
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),
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simulation.NewWeightedOperation(
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weightMsgEditValidator,
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SimulateMsgEditValidator(ak, k),
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),
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simulation.NewWeightedOperation(
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weightMsgDelegate,
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SimulateMsgDelegate(ak, k),
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),
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simulation.NewWeightedOperation(
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weightMsgUndelegate,
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SimulateMsgUndelegate(ak, k),
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),
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simulation.NewWeightedOperation(
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weightMsgBeginRedelegate,
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SimulateMsgBeginRedelegate(ak, k),
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),
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}
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}
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// SimulateMsgCreateValidator generates a MsgCreateValidator with random values
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// nolint: funlen
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func SimulateMsgCreateValidator(ak types.AccountKeeper, k keeper.Keeper) simulation.Operation {
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return func(
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r *rand.Rand, app *baseapp.BaseApp, ctx sdk.Context, accs []simulation.Account, chainID string,
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) (simulation.OperationMsg, []simulation.FutureOperation, error) {
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simAccount, _ := simulation.RandomAcc(r, accs)
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address := sdk.ValAddress(simAccount.Address)
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// ensure the validator doesn't exist already
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_, found := k.GetValidator(ctx, address)
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if found {
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return simulation.NoOpMsg(types.ModuleName), nil, nil
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}
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denom := k.GetParams(ctx).BondDenom
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amount := ak.GetAccount(ctx, simAccount.Address).GetCoins().AmountOf(denom)
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if !amount.IsPositive() {
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return simulation.NoOpMsg(types.ModuleName), nil, nil
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}
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amount, err := simulation.RandPositiveInt(r, amount)
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if err != nil {
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return simulation.NoOpMsg(types.ModuleName), nil, err
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}
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selfDelegation := sdk.NewCoin(denom, amount)
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account := ak.GetAccount(ctx, simAccount.Address)
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coins := account.SpendableCoins(ctx.BlockTime())
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var fees sdk.Coins
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coins, hasNeg := coins.SafeSub(sdk.Coins{selfDelegation})
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if !hasNeg {
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fees, err = simulation.RandomFees(r, ctx, coins)
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if err != nil {
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return simulation.NoOpMsg(types.ModuleName), nil, err
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}
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}
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description := types.NewDescription(
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simulation.RandStringOfLength(r, 10),
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simulation.RandStringOfLength(r, 10),
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simulation.RandStringOfLength(r, 10),
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simulation.RandStringOfLength(r, 10),
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simulation.RandStringOfLength(r, 10),
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)
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maxCommission := sdk.NewDecWithPrec(int64(simulation.RandIntBetween(r, 0, 100)), 2)
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commission := types.NewCommissionRates(
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simulation.RandomDecAmount(r, maxCommission),
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maxCommission,
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simulation.RandomDecAmount(r, maxCommission),
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)
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msg := types.NewMsgCreateValidator(address, simAccount.PubKey,
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selfDelegation, description, commission, sdk.OneInt())
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tx := helpers.GenTx(
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[]sdk.Msg{msg},
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fees,
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helpers.DefaultGenTxGas,
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chainID,
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[]uint64{account.GetAccountNumber()},
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[]uint64{account.GetSequence()},
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simAccount.PrivKey,
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)
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res := app.Deliver(tx)
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if !res.IsOK() {
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return simulation.NoOpMsg(types.ModuleName), nil, errors.New(res.Log)
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}
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return simulation.NewOperationMsg(msg, true, ""), nil, nil
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}
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}
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// SimulateMsgEditValidator generates a MsgEditValidator with random values
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// nolint: funlen
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func SimulateMsgEditValidator(ak types.AccountKeeper, k keeper.Keeper) simulation.Operation {
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return func(
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r *rand.Rand, app *baseapp.BaseApp, ctx sdk.Context, accs []simulation.Account, chainID string,
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) (simulation.OperationMsg, []simulation.FutureOperation, error) {
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if len(k.GetAllValidators(ctx)) == 0 {
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return simulation.NoOpMsg(types.ModuleName), nil, nil
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}
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val, ok := keeper.RandomValidator(r, k, ctx)
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if !ok {
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return simulation.NoOpMsg(types.ModuleName), nil, nil
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}
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address := val.GetOperator()
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newCommissionRate := simulation.RandomDecAmount(r, val.Commission.MaxRate)
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if err := val.Commission.ValidateNewRate(newCommissionRate, ctx.BlockHeader().Time); err != nil {
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// skip as the commission is invalid
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return simulation.NoOpMsg(types.ModuleName), nil, nil
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}
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simAccount, found := simulation.FindAccount(accs, sdk.AccAddress(val.GetOperator()))
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if !found {
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return simulation.NoOpMsg(types.ModuleName), nil, fmt.Errorf("validator %s not found", val.GetOperator())
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}
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account := ak.GetAccount(ctx, simAccount.Address)
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fees, err := simulation.RandomFees(r, ctx, account.SpendableCoins(ctx.BlockTime()))
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if err != nil {
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return simulation.NoOpMsg(types.ModuleName), nil, err
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}
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description := types.NewDescription(
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simulation.RandStringOfLength(r, 10),
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simulation.RandStringOfLength(r, 10),
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simulation.RandStringOfLength(r, 10),
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simulation.RandStringOfLength(r, 10),
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simulation.RandStringOfLength(r, 10),
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)
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msg := types.NewMsgEditValidator(address, description, &newCommissionRate, nil)
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tx := helpers.GenTx(
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[]sdk.Msg{msg},
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fees,
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helpers.DefaultGenTxGas,
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chainID,
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[]uint64{account.GetAccountNumber()},
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[]uint64{account.GetSequence()},
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simAccount.PrivKey,
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)
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res := app.Deliver(tx)
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if !res.IsOK() {
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return simulation.NoOpMsg(types.ModuleName), nil, errors.New(res.Log)
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}
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return simulation.NewOperationMsg(msg, true, ""), nil, nil
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}
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}
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// SimulateMsgDelegate generates a MsgDelegate with random values
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// nolint: funlen
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func SimulateMsgDelegate(ak types.AccountKeeper, k keeper.Keeper) simulation.Operation {
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return func(
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r *rand.Rand, app *baseapp.BaseApp, ctx sdk.Context, accs []simulation.Account, chainID string,
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) (simulation.OperationMsg, []simulation.FutureOperation, error) {
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denom := k.GetParams(ctx).BondDenom
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if len(k.GetAllValidators(ctx)) == 0 {
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return simulation.NoOpMsg(types.ModuleName), nil, nil
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}
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simAccount, _ := simulation.RandomAcc(r, accs)
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val, ok := keeper.RandomValidator(r, k, ctx)
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if !ok {
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return simulation.NoOpMsg(types.ModuleName), nil, nil
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}
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if val.InvalidExRate() {
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return simulation.NoOpMsg(types.ModuleName), nil, nil
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}
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amount := ak.GetAccount(ctx, simAccount.Address).GetCoins().AmountOf(denom)
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if !amount.IsPositive() {
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return simulation.NoOpMsg(types.ModuleName), nil, nil
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}
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amount, err := simulation.RandPositiveInt(r, amount)
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if err != nil {
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return simulation.NoOpMsg(types.ModuleName), nil, err
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}
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bondAmt := sdk.NewCoin(denom, amount)
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account := ak.GetAccount(ctx, simAccount.Address)
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coins := account.SpendableCoins(ctx.BlockTime())
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var fees sdk.Coins
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coins, hasNeg := coins.SafeSub(sdk.Coins{bondAmt})
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if !hasNeg {
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fees, err = simulation.RandomFees(r, ctx, coins)
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if err != nil {
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return simulation.NoOpMsg(types.ModuleName), nil, err
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}
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}
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msg := types.NewMsgDelegate(simAccount.Address, val.GetOperator(), bondAmt)
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tx := helpers.GenTx(
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[]sdk.Msg{msg},
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fees,
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helpers.DefaultGenTxGas,
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chainID,
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[]uint64{account.GetAccountNumber()},
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[]uint64{account.GetSequence()},
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simAccount.PrivKey,
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)
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res := app.Deliver(tx)
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if !res.IsOK() {
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return simulation.NoOpMsg(types.ModuleName), nil, errors.New(res.Log)
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}
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return simulation.NewOperationMsg(msg, true, ""), nil, nil
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}
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}
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// SimulateMsgUndelegate generates a MsgUndelegate with random values
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// nolint: funlen
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func SimulateMsgUndelegate(ak types.AccountKeeper, k keeper.Keeper) simulation.Operation {
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return func(
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r *rand.Rand, app *baseapp.BaseApp, ctx sdk.Context, accs []simulation.Account, chainID string,
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) (simulation.OperationMsg, []simulation.FutureOperation, error) {
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// get random validator
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validator, ok := keeper.RandomValidator(r, k, ctx)
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if !ok {
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return simulation.NoOpMsg(types.ModuleName), nil, nil
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}
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valAddr := validator.GetOperator()
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delegations := k.GetValidatorDelegations(ctx, validator.OperatorAddress)
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// get random delegator from validator
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delegation := delegations[r.Intn(len(delegations))]
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delAddr := delegation.GetDelegatorAddr()
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if k.HasMaxUnbondingDelegationEntries(ctx, delAddr, valAddr) {
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return simulation.NoOpMsg(types.ModuleName), nil, nil
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}
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totalBond := validator.TokensFromShares(delegation.GetShares()).TruncateInt()
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if !totalBond.IsPositive() {
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return simulation.NoOpMsg(types.ModuleName), nil, nil
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}
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unbondAmt, err := simulation.RandPositiveInt(r, totalBond)
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if err != nil {
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return simulation.NoOpMsg(types.ModuleName), nil, err
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}
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if unbondAmt.IsZero() {
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return simulation.NoOpMsg(types.ModuleName), nil, nil
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}
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msg := types.NewMsgUndelegate(
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delAddr, valAddr, sdk.NewCoin(k.BondDenom(ctx), unbondAmt),
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)
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// need to retrieve the simulation account associated with delegation to retrieve PrivKey
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var simAccount simulation.Account
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for _, simAcc := range accs {
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if simAcc.Address.Equals(delAddr) {
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simAccount = simAcc
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break
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}
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}
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// if simaccount.PrivKey == nil, delegation address does not exist in accs. Return error
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if simAccount.PrivKey == nil {
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return simulation.NoOpMsg(types.ModuleName), nil, fmt.Errorf("delegation addr: %s does not exist in simulation accounts", delAddr)
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}
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account := ak.GetAccount(ctx, delAddr)
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fees, err := simulation.RandomFees(r, ctx, account.SpendableCoins(ctx.BlockTime()))
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if err != nil {
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return simulation.NoOpMsg(types.ModuleName), nil, err
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}
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tx := helpers.GenTx(
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[]sdk.Msg{msg},
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fees,
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helpers.DefaultGenTxGas,
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chainID,
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[]uint64{account.GetAccountNumber()},
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[]uint64{account.GetSequence()},
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simAccount.PrivKey,
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)
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res := app.Deliver(tx)
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if !res.IsOK() {
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return simulation.NoOpMsg(types.ModuleName), nil, errors.New(res.Log)
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}
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return simulation.NewOperationMsg(msg, true, ""), nil, nil
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}
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}
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// SimulateMsgBeginRedelegate generates a MsgBeginRedelegate with random values
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// nolint: funlen
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func SimulateMsgBeginRedelegate(ak types.AccountKeeper, k keeper.Keeper) simulation.Operation {
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return func(
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r *rand.Rand, app *baseapp.BaseApp, ctx sdk.Context, accs []simulation.Account, chainID string,
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) (simulation.OperationMsg, []simulation.FutureOperation, error) {
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// get random source validator
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srcVal, ok := keeper.RandomValidator(r, k, ctx)
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if !ok {
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return simulation.NoOpMsg(types.ModuleName), nil, nil
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}
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srcAddr := srcVal.GetOperator()
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delegations := k.GetValidatorDelegations(ctx, srcAddr)
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// get random delegator from src validator
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delegation := delegations[r.Intn(len(delegations))]
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delAddr := delegation.GetDelegatorAddr()
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if k.HasReceivingRedelegation(ctx, delAddr, srcAddr) {
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return simulation.NoOpMsg(types.ModuleName), nil, nil // skip
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}
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// get random destination validator
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destVal, ok := keeper.RandomValidator(r, k, ctx)
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if !ok {
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return simulation.NoOpMsg(types.ModuleName), nil, nil
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}
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destAddr := destVal.GetOperator()
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if srcAddr.Equals(destAddr) ||
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destVal.InvalidExRate() ||
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k.HasMaxRedelegationEntries(ctx, delAddr, srcAddr, destAddr) {
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return simulation.NoOpMsg(types.ModuleName), nil, nil
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}
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totalBond := srcVal.TokensFromShares(delegation.GetShares()).TruncateInt()
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if !totalBond.IsPositive() {
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return simulation.NoOpMsg(types.ModuleName), nil, nil
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}
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redAmt, err := simulation.RandPositiveInt(r, totalBond)
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if err != nil {
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return simulation.NoOpMsg(types.ModuleName), nil, err
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}
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if redAmt.IsZero() {
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return simulation.NoOpMsg(types.ModuleName), nil, nil
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}
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// check if the shares truncate to zero
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shares, err := srcVal.SharesFromTokens(redAmt)
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if err != nil {
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return simulation.NoOpMsg(types.ModuleName), nil, err
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}
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if srcVal.TokensFromShares(shares).TruncateInt().IsZero() {
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return simulation.NoOpMsg(types.ModuleName), nil, nil // skip
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}
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// need to retrieve the simulation account associated with delegation to retrieve PrivKey
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var simAccount simulation.Account
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for _, simAcc := range accs {
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if simAcc.Address.Equals(delAddr) {
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simAccount = simAcc
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break
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}
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}
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// if simaccount.PrivKey == nil, delegation address does not exist in accs. Return error
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if simAccount.PrivKey == nil {
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return simulation.NoOpMsg(types.ModuleName), nil, fmt.Errorf("delegation addr: %s does not exist in simulation accounts", delAddr)
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}
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// get tx fees
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account := ak.GetAccount(ctx, delAddr)
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fees, err := simulation.RandomFees(r, ctx, account.SpendableCoins(ctx.BlockTime()))
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if err != nil {
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return simulation.NoOpMsg(types.ModuleName), nil, err
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}
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msg := types.NewMsgBeginRedelegate(
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delAddr, srcAddr, destAddr,
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sdk.NewCoin(k.BondDenom(ctx), redAmt),
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)
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tx := helpers.GenTx(
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[]sdk.Msg{msg},
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fees,
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helpers.DefaultGenTxGas,
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chainID,
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[]uint64{account.GetAccountNumber()},
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[]uint64{account.GetSequence()},
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simAccount.PrivKey,
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)
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res := app.Deliver(tx)
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if !res.IsOK() {
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return simulation.NoOpMsg(types.ModuleName), nil, errors.New(res.Log)
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}
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return simulation.NewOperationMsg(msg, true, ""), nil, nil
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}
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}
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