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account.go
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account.go
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package simulation
import (
"math/rand"
"github.com/furyaxyz/fuxchain/libs/tendermint/crypto"
"github.com/furyaxyz/fuxchain/libs/tendermint/crypto/secp256k1"
sdk "github.com/furyaxyz/fuxchain/libs/cosmos-sdk/types"
)
// Account contains a privkey, pubkey, address tuple
// eventually more useful data can be placed in here.
// (e.g. number of coins)
type Account struct {
PrivKey crypto.PrivKey
PubKey crypto.PubKey
Address sdk.AccAddress
}
// Equals returns true if two accounts are equal
func (acc Account) Equals(acc2 Account) bool {
return acc.Address.Equals(acc2.Address)
}
// RandomAcc picks and returns a random account from an array and returs its
// position in the array.
func RandomAcc(r *rand.Rand, accs []Account) (Account, int) {
idx := r.Intn(len(accs))
return accs[idx], idx
}
// RandomAccounts generates n random accounts
func RandomAccounts(r *rand.Rand, n int) []Account {
accs := make([]Account, n)
for i := 0; i < n; i++ {
// don't need that much entropy for simulation
privkeySeed := make([]byte, 15)
r.Read(privkeySeed)
accs[i].PrivKey = secp256k1.GenPrivKeySecp256k1(privkeySeed)
accs[i].PubKey = accs[i].PrivKey.PubKey()
accs[i].Address = sdk.AccAddress(accs[i].PubKey.Address())
}
return accs
}
// FindAccount iterates over all the simulation accounts to find the one that matches
// the given address
func FindAccount(accs []Account, address sdk.Address) (Account, bool) {
for _, acc := range accs {
if acc.Address.Equals(address) {
return acc, true
}
}
return Account{}, false
}
// RandomFees returns a random fee by selecting a random coin denomination and
// amount from the account's available balance. If the user doesn't have enough
// funds for paying fees, it returns empty coins.
func RandomFees(r *rand.Rand, ctx sdk.Context, spendableCoins sdk.Coins) (sdk.Coins, error) {
if spendableCoins.Empty() {
return nil, nil
}
denomIndex := r.Intn(len(spendableCoins))
randCoin := spendableCoins[denomIndex]
if randCoin.Amount.IsZero() {
return nil, nil
}
amt, err := RandPositiveInt(r, randCoin.Amount)
if err != nil {
return nil, err
}
// Create a random fee and verify the fees are within the account's spendable
// balance.
fees := sdk.NewCoins(sdk.NewCoin(randCoin.Denom, amt))
return fees, nil
}