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			146 lines
		
	
	
		
			7.1 KiB
		
	
	
	
		
			Go
		
	
	
	
	
	
			
		
		
	
	
			146 lines
		
	
	
		
			7.1 KiB
		
	
	
	
		
			Go
		
	
	
	
	
	
package keeper
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import (
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	sdk "github.com/cosmos/cosmos-sdk/types"
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	sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
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	"github.com/cosmos/cosmos-sdk/x/auth"
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	authtypes "github.com/cosmos/cosmos-sdk/x/auth/types"
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	"github.com/cosmos/cosmos-sdk/x/auth/vesting"
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	supplyExported "github.com/cosmos/cosmos-sdk/x/supply/exported"
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	"github.com/kava-labs/kava/x/hard/types"
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	validatorvesting "github.com/kava-labs/kava/x/validator-vesting"
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)
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// SendTimeLockedCoinsToAccount sends time-locked coins from the input module account to the recipient.
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// If the recipients account is not a vesting account and the input length is greater than zero,
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// the recipient account is converted to a periodic vesting account and the coins are added to the vesting balance as a vesting period with the input length.
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func (k Keeper) SendTimeLockedCoinsToAccount(ctx sdk.Context, senderModule string, recipientAddr sdk.AccAddress, amt sdk.Coins, length int64) error {
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	macc := k.supplyKeeper.GetModuleAccount(ctx, senderModule)
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	if !macc.GetCoins().IsAllGTE(amt) {
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		return sdkerrors.Wrapf(types.ErrInsufficientModAccountBalance, "%s", senderModule)
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	}
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	// 0. Get the account from the account keeper and do a type switch, error if it's a validator vesting account or module account (can make this work for validator vesting later if necessary)
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	acc := k.accountKeeper.GetAccount(ctx, recipientAddr)
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	if acc == nil {
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		return sdkerrors.Wrapf(types.ErrAccountNotFound, recipientAddr.String())
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	}
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	if length == 0 {
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		return k.supplyKeeper.SendCoinsFromModuleToAccount(ctx, senderModule, recipientAddr, amt)
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	}
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	switch acc.(type) {
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	case *validatorvesting.ValidatorVestingAccount, supplyExported.ModuleAccountI:
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		return sdkerrors.Wrapf(types.ErrInvalidAccountType, "%T", acc)
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	case *vesting.PeriodicVestingAccount:
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		return k.SendTimeLockedCoinsToPeriodicVestingAccount(ctx, senderModule, recipientAddr, amt, length)
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	case *auth.BaseAccount:
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		return k.SendTimeLockedCoinsToBaseAccount(ctx, senderModule, recipientAddr, amt, length)
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	default:
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		return sdkerrors.Wrapf(types.ErrInvalidAccountType, "%T", acc)
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	}
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}
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// SendTimeLockedCoinsToPeriodicVestingAccount sends time-locked coins from the input module account to the recipient
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func (k Keeper) SendTimeLockedCoinsToPeriodicVestingAccount(ctx sdk.Context, senderModule string, recipientAddr sdk.AccAddress, amt sdk.Coins, length int64) error {
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	err := k.supplyKeeper.SendCoinsFromModuleToAccount(ctx, senderModule, recipientAddr, amt)
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	if err != nil {
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		return err
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	}
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	k.addCoinsToVestingSchedule(ctx, recipientAddr, amt, length)
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	return nil
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}
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// SendTimeLockedCoinsToBaseAccount sends time-locked coins from the input module account to the recipient, converting the recipient account to a vesting account
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func (k Keeper) SendTimeLockedCoinsToBaseAccount(ctx sdk.Context, senderModule string, recipientAddr sdk.AccAddress, amt sdk.Coins, length int64) error {
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	err := k.supplyKeeper.SendCoinsFromModuleToAccount(ctx, senderModule, recipientAddr, amt)
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	if err != nil {
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		return err
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	}
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	acc := k.accountKeeper.GetAccount(ctx, recipientAddr)
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	// transition the account to a periodic vesting account:
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	bacc := authtypes.NewBaseAccount(acc.GetAddress(), acc.GetCoins(), acc.GetPubKey(), acc.GetAccountNumber(), acc.GetSequence())
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	newPeriods := vesting.Periods{types.NewPeriod(amt, length)}
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	bva, err := vesting.NewBaseVestingAccount(bacc, amt, ctx.BlockTime().Unix()+length)
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	if err != nil {
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		return err
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	}
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	pva := vesting.NewPeriodicVestingAccountRaw(bva, ctx.BlockTime().Unix(), newPeriods)
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	k.accountKeeper.SetAccount(ctx, pva)
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	return nil
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}
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// addCoinsToVestingSchedule adds coins to the input account's vesting schedule where length is the amount of time (from the current block time), in seconds, that the coins will be vesting for
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// the input address must be a periodic vesting account
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func (k Keeper) addCoinsToVestingSchedule(ctx sdk.Context, addr sdk.AccAddress, amt sdk.Coins, length int64) {
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	acc := k.accountKeeper.GetAccount(ctx, addr)
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	vacc := acc.(*vesting.PeriodicVestingAccount)
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	// Add the new vesting coins to OriginalVesting
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	vacc.OriginalVesting = vacc.OriginalVesting.Add(amt...)
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	if vacc.EndTime < ctx.BlockTime().Unix() {
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		// edge case one - the vesting account's end time is in the past (ie, all previous vesting periods have completed)
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		// append a new period to the vesting account, update the end time, update the account in the store and return
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		newPeriodLength := (ctx.BlockTime().Unix() - vacc.EndTime) + length
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		newPeriod := types.NewPeriod(amt, newPeriodLength)
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		vacc.VestingPeriods = append(vacc.VestingPeriods, newPeriod)
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		vacc.EndTime = ctx.BlockTime().Unix() + length
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		k.accountKeeper.SetAccount(ctx, vacc)
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		return
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	}
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	if vacc.StartTime > ctx.BlockTime().Unix() {
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		// edge case two - the vesting account's start time is in the future (all periods have not started)
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		// update the start time to now and adjust the period lengths in place - a new period will be inserted in the next code block
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		updatedPeriods := vesting.Periods{}
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		for i, period := range vacc.VestingPeriods {
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			updatedPeriod := period
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			if i == 0 {
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				updatedPeriod = types.NewPeriod(period.Amount, (vacc.StartTime-ctx.BlockTime().Unix())+period.Length) // 110 - 100 + 6 = 16
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			}
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			updatedPeriods = append(updatedPeriods, updatedPeriod)
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		}
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		vacc.VestingPeriods = updatedPeriods
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		vacc.StartTime = ctx.BlockTime().Unix()
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	}
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	// logic for inserting a new vesting period into the existing vesting schedule
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	remainingLength := vacc.EndTime - ctx.BlockTime().Unix()
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	elapsedTime := ctx.BlockTime().Unix() - vacc.StartTime
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	proposedEndTime := ctx.BlockTime().Unix() + length
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	if remainingLength < length {
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		// in the case that the proposed length is longer than the remaining length of all vesting periods, create a new period with length equal to the difference between the proposed length and the previous total length
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		newPeriodLength := length - remainingLength
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		newPeriod := types.NewPeriod(amt, newPeriodLength)
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		vacc.VestingPeriods = append(vacc.VestingPeriods, newPeriod)
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		// update the end time so that the sum of all period lengths equals endTime - startTime
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		vacc.EndTime = proposedEndTime
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	} else {
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		// In the case that the proposed length is less than or equal to the sum of all previous period lengths, insert the period and update other periods as necessary.
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		newPeriods := vesting.Periods{}
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		lengthCounter := int64(0)
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		appendRemaining := false
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		for _, period := range vacc.VestingPeriods {
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			if appendRemaining {
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				newPeriods = append(newPeriods, period)
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				continue
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			}
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			lengthCounter += period.Length
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			if lengthCounter < elapsedTime+length {
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				newPeriods = append(newPeriods, period)
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			} else if lengthCounter == elapsedTime+length {
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				newPeriod := types.NewPeriod(period.Amount.Add(amt...), period.Length)
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				newPeriods = append(newPeriods, newPeriod)
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				appendRemaining = true
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			} else {
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				newPeriod := types.NewPeriod(amt, elapsedTime+length-types.GetTotalVestingPeriodLength(newPeriods))
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				previousPeriod := types.NewPeriod(period.Amount, period.Length-newPeriod.Length)
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				newPeriods = append(newPeriods, newPeriod, previousPeriod)
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				appendRemaining = true
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			}
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		}
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		vacc.VestingPeriods = newPeriods
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	}
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	k.accountKeeper.SetAccount(ctx, vacc)
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	return
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}
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