cmd/quicksilverd: AddGenesisAccountCmd has a redundant condition checking if a balance is zero and if the vesting amount is greater but it really should check that the coalesced vesting amounts are not greater than the coalesced balances in case there are duplicate denomination entries in the coins

[odeke-em]

If we look at this code https://github.com/ingenuity-build/quicksilver/blob/4434d8801040205d86a68a3ca681c69f94ba5815/cmd/quicksilverd/genaccounts.go#L101-L102 really if someone accidentally entered a duplicate denomination entry those checks could fail for example with {500qck, 400qck} for vestingAmount then {600qck} for balance, that check doesn't complain yet technically the total balance is less than the collective vesting amount. Unfortunately the cosmos-sdk's code doesn't support coalescing but we should perhaps apply this coalescing

// coalesceAndSort takes in coins and coalesces them by denomination
// and adds those values, then later sorts them and returns the result.
func coalesceAndSort(cL sdk.Coins) (filtered sdk.Coins) {
	uniqCoins := make(map[string]sdk.Coins)
	anyDups := false
	for _, c := range cL {
		uniqCoins[c.Denom] = append(uniqCoins[c.Denom], c)
		if len(uniqCoins[c.Denom]) > 1 {
			anyDups = true
		}
	}
	if !anyDups {
		return cL
	}

	for denom, cL := range uniqCoins {
		unitCoin := sdk.Coin{Denom: denom, Amount: sdk.NewInt(0)}
		for _, c := range cL {
			unitCoin = unitCoin.Add(c)
		}
		filtered = append(filtered, unitCoin)
	}
	return filtered.Sort()
}

which will catch those checks after being applied to each sdk.Coins values.

/cc @elias-orijtech

[odeke-em]

I fixed this in cosmos-sdk per cosmos/cosmos-sdk#13234 with PR cosmos/cosmos-sdk#13265