0g-chain/x/hard/keeper/timelock.go
2020-12-21 18:18:55 +01:00

146 lines
7.1 KiB
Go

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