0g-chain/x/bep3/simulation/genesis.go
2020-04-30 10:13:31 -04:00

170 lines
5.4 KiB
Go

package simulation
import (
"fmt"
"math/rand"
"strings"
"github.com/cosmos/cosmos-sdk/codec"
sdk "github.com/cosmos/cosmos-sdk/types"
"github.com/cosmos/cosmos-sdk/types/module"
"github.com/cosmos/cosmos-sdk/x/auth"
authexported "github.com/cosmos/cosmos-sdk/x/auth/exported"
"github.com/cosmos/cosmos-sdk/x/simulation"
"github.com/cosmos/cosmos-sdk/x/supply"
"github.com/kava-labs/kava/x/bep3/types"
)
// Simulation parameter constants
const (
BnbDeputyAddress = "bnb_deputy_address"
MinBlockLock = "min_block_lock"
MaxBlockLock = "max_block_lock"
SupportedAssets = "supported_assets"
)
var (
MaxSupplyLimit = sdk.NewInt(1000000000000)
accs []simulation.Account
ConsistentDenoms = [3]string{"bnb", "xrp", "btc"}
)
// GenRandBnbDeputy randomized BnbDeputyAddress
func GenRandBnbDeputy(r *rand.Rand) simulation.Account {
acc, _ := simulation.RandomAcc(r, accs)
return acc
}
// GenMinBlockLock randomized MinBlockLock
func GenMinBlockLock(r *rand.Rand) int64 {
min := int(types.AbsoluteMinimumBlockLock)
max := int(types.AbsoluteMaximumBlockLock)
return int64(r.Intn(max-min) + min)
}
// GenMaxBlockLock randomized MaxBlockLock
func GenMaxBlockLock(r *rand.Rand, minBlockLock int64) int64 {
min := int(minBlockLock)
max := int(types.AbsoluteMaximumBlockLock)
return int64(r.Intn(max-min) + min)
}
// GenSupportedAssets gets randomized SupportedAssets
func GenSupportedAssets(r *rand.Rand) types.AssetParams {
var assets types.AssetParams
numAssets := (r.Intn(10) + 1)
for i := 0; i < numAssets; i++ {
denom := strings.ToLower(simulation.RandStringOfLength(r, (r.Intn(3) + 3)))
asset := genSupportedAsset(r, denom)
assets = append(assets, asset)
}
// Add bnb, btc, or xrp as a supported asset for interactions with other modules
stableAsset := genSupportedAsset(r, ConsistentDenoms[r.Intn(3)])
assets = append(assets, stableAsset)
return assets
}
func genSupportedAsset(r *rand.Rand, denom string) types.AssetParam {
coinID, _ := simulation.RandPositiveInt(r, sdk.NewInt(100000))
limit, _ := simulation.RandPositiveInt(r, MaxSupplyLimit)
return types.AssetParam{
Denom: denom,
CoinID: int(coinID.Int64()),
Limit: limit,
Active: true,
}
}
// RandomizedGenState generates a random GenesisState
func RandomizedGenState(simState *module.SimulationState) {
accs = simState.Accounts
bep3Genesis := loadRandomBep3GenState(simState)
fmt.Printf("Selected randomly generated %s parameters:\n%s\n", types.ModuleName, codec.MustMarshalJSONIndent(simState.Cdc, bep3Genesis))
simState.GenState[types.ModuleName] = simState.Cdc.MustMarshalJSON(bep3Genesis)
authGenesis, totalCoins := loadAuthGenState(simState, bep3Genesis)
simState.GenState[auth.ModuleName] = simState.Cdc.MustMarshalJSON(authGenesis)
// Update supply to match amount of coins in auth
var supplyGenesis supply.GenesisState
simState.Cdc.MustUnmarshalJSON(simState.GenState[supply.ModuleName], &supplyGenesis)
for _, deputyCoin := range totalCoins {
supplyGenesis.Supply = supplyGenesis.Supply.Add(deputyCoin...)
}
simState.GenState[supply.ModuleName] = simState.Cdc.MustMarshalJSON(supplyGenesis)
}
func loadRandomBep3GenState(simState *module.SimulationState) types.GenesisState {
bnbDeputy := GenRandBnbDeputy(simState.Rand)
// min/max block lock are hardcoded to 50/100 for expected -NumBlocks=100
minBlockLock := int64(types.AbsoluteMinimumBlockLock)
maxBlockLock := minBlockLock * 2
var supportedAssets types.AssetParams
simState.AppParams.GetOrGenerate(
simState.Cdc, SupportedAssets, &supportedAssets, simState.Rand,
func(r *rand.Rand) { supportedAssets = GenSupportedAssets(r) },
)
bep3Genesis := types.GenesisState{
Params: types.Params{
BnbDeputyAddress: bnbDeputy.Address,
MinBlockLock: minBlockLock,
MaxBlockLock: maxBlockLock,
SupportedAssets: supportedAssets,
},
}
return bep3Genesis
}
func loadAuthGenState(simState *module.SimulationState, bep3Genesis types.GenesisState) (
auth.GenesisState, []sdk.Coins) {
var authGenesis auth.GenesisState
simState.Cdc.MustUnmarshalJSON(simState.GenState[auth.ModuleName], &authGenesis)
deputy, found := getAccount(authGenesis.Accounts, bep3Genesis.Params.BnbDeputyAddress)
if !found {
panic("deputy address not found in available accounts")
}
// Load total limit of each supported asset to deputy's account
var totalCoins []sdk.Coins
for _, asset := range bep3Genesis.Params.SupportedAssets {
assetCoin := sdk.NewCoins(sdk.NewCoin(asset.Denom, asset.Limit))
if err := deputy.SetCoins(deputy.GetCoins().Add(assetCoin...)); err != nil {
panic(err)
}
totalCoins = append(totalCoins, assetCoin)
}
authGenesis.Accounts = replaceOrAppendAccount(authGenesis.Accounts, deputy)
return authGenesis, totalCoins
}
// Return an account from a list of accounts that matches an address.
func getAccount(accounts []authexported.GenesisAccount, addr sdk.AccAddress) (authexported.GenesisAccount, bool) {
for _, a := range accounts {
if a.GetAddress().Equals(addr) {
return a, true
}
}
return nil, false
}
// In a list of accounts, replace the first account found with the same address. If not found, append the account.
func replaceOrAppendAccount(accounts []authexported.GenesisAccount, acc authexported.GenesisAccount) []authexported.GenesisAccount {
newAccounts := accounts
for i, a := range accounts {
if a.GetAddress().Equals(acc.GetAddress()) {
newAccounts[i] = acc
return newAccounts
}
}
return append(newAccounts, acc)
}