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