mirror of
https://github.com/0glabs/0g-chain.git
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262 lines
8.7 KiB
Go
262 lines
8.7 KiB
Go
package simulation
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import (
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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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sdk "github.com/cosmos/cosmos-sdk/types"
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"github.com/cosmos/cosmos-sdk/x/simulation"
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appparams "github.com/kava-labs/kava/app/params"
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"github.com/kava-labs/kava/x/bep3/keeper"
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"github.com/kava-labs/kava/x/bep3/types"
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)
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var (
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noOpMsg = simulation.NoOpMsg(types.ModuleName)
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randomNumber = []byte{114, 21, 74, 180, 81, 92, 21, 91, 173, 164, 143, 111, 120, 58, 241, 58, 40, 22, 59, 133, 102, 233, 55, 149, 12, 199, 231, 63, 122, 23, 88, 9}
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)
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// Simulation operation weights constants
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const (
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OpWeightMsgCreateAtomicSwap = "op_weight_msg_create_atomic_swap"
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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, k keeper.Keeper,
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) simulation.WeightedOperations {
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var weightCreateAtomicSwap int
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appParams.GetOrGenerate(cdc, OpWeightMsgCreateAtomicSwap, &weightCreateAtomicSwap, nil,
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func(_ *rand.Rand) {
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weightCreateAtomicSwap = appparams.DefaultWeightMsgCreateAtomicSwap
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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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weightCreateAtomicSwap,
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SimulateMsgCreateAtomicSwap(ak, k),
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),
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}
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}
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// SimulateMsgCreateAtomicSwap generates a MsgCreateAtomicSwap with random values
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func SimulateMsgCreateAtomicSwap(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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// Set up deputy address as it's required for all atomic swaps
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deputyAddr := k.GetBnbDeputyAddress(ctx)
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deputyAcc, foundDeputy := simulation.FindAccount(accs, deputyAddr)
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if !foundDeputy {
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return noOpMsg, nil, nil
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}
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// Get asset supplies and shuffle them
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supplies := k.GetAllAssetSupplies(ctx)
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r.Shuffle(len(supplies), func(i, j int) {
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supplies[i], supplies[j] = supplies[j], supplies[i]
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})
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// Search for an account that holds coins received by an atomic swap
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minAmountPlusFee := k.GetMinAmount(ctx).Add(k.GetBnbDeputyFixedFee(ctx))
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senderOut, asset, found := findValidAccountAssetSupplyPair(accs, supplies, func(acc simulation.Account, asset types.AssetSupply) bool {
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if asset.CurrentSupply.Amount.IsPositive() {
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authAcc := ak.GetAccount(ctx, acc.Address)
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if authAcc.SpendableCoins(ctx.BlockTime()).AmountOf(asset.Denom).GT(minAmountPlusFee) {
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return true
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}
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}
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return false
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})
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// Set sender, recipient, and denom depending on swap direction
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var sender simulation.Account
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var recipient simulation.Account
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var denom string
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// If an outgoing swap can be created, it's chosen 50% of the time.
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if found && r.Intn(100) < 50 {
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sender = senderOut
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recipient = deputyAcc
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denom = asset.Denom
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} else {
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sender = deputyAcc
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recipient, _ = simulation.RandomAcc(r, accs)
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// Randomly select an asset from supported assets
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assets, foundAsset := k.GetAssets(ctx)
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if !foundAsset {
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return noOpMsg, nil, fmt.Errorf("no supported assets found")
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}
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denom = assets[r.Intn(len(assets))].Denom
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}
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recipientOtherChain := simulation.RandStringOfLength(r, 43)
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senderOtherChain := simulation.RandStringOfLength(r, 43)
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// Use same random number for determinism
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timestamp := ctx.BlockTime().Unix()
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randomNumberHash := types.CalculateRandomHash(randomNumber, timestamp)
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// Check that the sender has coins for fee
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senderAcc := ak.GetAccount(ctx, sender.Address)
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fees, err := simulation.RandomFees(r, ctx, senderAcc.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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// Get maximum valid amount
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maximumAmount := senderAcc.SpendableCoins(ctx.BlockTime()).Sub(fees).AmountOf(denom)
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// The maximum amount for outgoing swaps is limited by the asset's current supply
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if recipient.Equals(deputyAcc) {
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assetSupply, foundAssetSupply := k.GetAssetSupply(ctx, []byte(denom))
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if !foundAssetSupply {
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return noOpMsg, nil, fmt.Errorf("no asset supply found")
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}
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if maximumAmount.GT(assetSupply.CurrentSupply.Amount) {
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maximumAmount = assetSupply.CurrentSupply.Amount
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}
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}
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// The maximum amount for all swaps is limited by the total max limit
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if maximumAmount.GT(k.GetMaxAmount(ctx)) {
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maximumAmount = k.GetMaxAmount(ctx)
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}
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// Get an amount of coins between 0.1 and 2% of total coins
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amount := maximumAmount.Quo(sdk.NewInt(int64(simulation.RandIntBetween(r, 50, 1000))))
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if amount.LT(minAmountPlusFee) {
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return simulation.NewOperationMsgBasic(types.ModuleName, fmt.Sprintf("no-operation (all funds exhausted for asset %s)", denom), "", false, nil), nil, nil
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}
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coins := sdk.NewCoins(sdk.NewCoin(denom, amount))
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// We're assuming that sims are run with -NumBlocks=100
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heightSpan := uint64(55)
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msg := types.NewMsgCreateAtomicSwap(
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sender.Address, recipient.Address, recipientOtherChain, senderOtherChain,
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randomNumberHash, timestamp, coins, heightSpan,
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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{senderAcc.GetAccountNumber()},
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[]uint64{senderAcc.GetSequence()},
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sender.PrivKey,
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)
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_, result, err := app.Deliver(tx)
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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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// Construct a MsgClaimAtomicSwap or MsgRefundAtomicSwap future operation
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var futureOp simulation.FutureOperation
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swapID := types.CalculateSwapID(msg.RandomNumberHash, msg.From, msg.SenderOtherChain)
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if r.Intn(100) < 50 {
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// Claim future operation
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executionBlock := uint64(ctx.BlockHeight()) + msg.HeightSpan/2
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futureOp = simulation.FutureOperation{
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BlockHeight: int(executionBlock),
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Op: operationClaimAtomicSwap(ak, k, swapID, randomNumber),
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}
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} else {
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// Refund future operation
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executionBlock := uint64(ctx.BlockHeight()) + msg.HeightSpan
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futureOp = simulation.FutureOperation{
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BlockHeight: int(executionBlock),
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Op: operationRefundAtomicSwap(ak, k, swapID),
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}
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}
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return simulation.NewOperationMsg(msg, true, result.Log), []simulation.FutureOperation{futureOp}, nil
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}
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}
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func operationClaimAtomicSwap(ak types.AccountKeeper, k keeper.Keeper, swapID []byte, randomNumber []byte) 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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acc := ak.GetAccount(ctx, simAccount.Address)
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msg := types.NewMsgClaimAtomicSwap(acc.GetAddress(), swapID, randomNumber)
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fees, err := simulation.RandomFees(r, ctx, acc.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{acc.GetAccountNumber()},
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[]uint64{acc.GetSequence()},
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simAccount.PrivKey,
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)
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_, result, err := app.Deliver(tx)
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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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return simulation.NewOperationMsg(msg, true, result.Log), nil, nil
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}
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}
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func operationRefundAtomicSwap(ak types.AccountKeeper, k keeper.Keeper, swapID []byte) 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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acc := ak.GetAccount(ctx, simAccount.Address)
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msg := types.NewMsgRefundAtomicSwap(acc.GetAddress(), swapID)
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fees, err := simulation.RandomFees(r, ctx, acc.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{acc.GetAccountNumber()},
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[]uint64{acc.GetSequence()},
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simAccount.PrivKey,
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)
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_, result, err := app.Deliver(tx)
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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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return simulation.NewOperationMsg(msg, true, result.Log), nil, nil
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}
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}
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// findValidAccountAssetSupplyPair finds an account for which the callback func returns true
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func findValidAccountAssetSupplyPair(accounts []simulation.Account, supplies types.AssetSupplies,
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cb func(simulation.Account, types.AssetSupply) bool) (simulation.Account, types.AssetSupply, bool) {
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for _, supply := range supplies {
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for _, acc := range accounts {
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if isValid := cb(acc, supply); isValid {
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return acc, supply, true
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}
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}
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}
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return simulation.Account{}, types.AssetSupply{}, false
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}
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