mirror of
https://github.com/0glabs/0g-chain.git
synced 2024-12-27 08:45:19 +00:00
3375484f79
* Use cosmossdk.io/errors for deprecated error methods * Update error registration with cosmossdk.io/errors * Use cosmossdk.io/math for deprecated sdk.Int alias * Fix modified proto file * Update sdk.Int usage in swap hooks * Update e2e test deprecated method usage
272 lines
8.6 KiB
Go
272 lines
8.6 KiB
Go
package keeper
|
|
|
|
import (
|
|
"fmt"
|
|
|
|
errorsmod "cosmossdk.io/errors"
|
|
sdkmath "cosmossdk.io/math"
|
|
sdk "github.com/cosmos/cosmos-sdk/types"
|
|
sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
|
|
evmtypes "github.com/evmos/ethermint/x/evm/types"
|
|
|
|
"github.com/kava-labs/kava/x/evmutil/types"
|
|
)
|
|
|
|
const (
|
|
// EvmDenom is the gas denom used by the evm
|
|
EvmDenom = "akava"
|
|
|
|
// CosmosDenom is the gas denom used by the kava app
|
|
CosmosDenom = "ukava"
|
|
)
|
|
|
|
// ConversionMultiplier is the conversion multiplier between akava and ukava
|
|
var ConversionMultiplier = sdkmath.NewInt(1_000_000_000_000)
|
|
|
|
var _ evmtypes.BankKeeper = EvmBankKeeper{}
|
|
|
|
// EvmBankKeeper is a BankKeeper wrapper for the x/evm module to allow the use
|
|
// of the 18 decimal akava coin on the evm.
|
|
// x/evm consumes gas and send coins by minting and burning akava coins in its module
|
|
// account and then sending the funds to the target account.
|
|
// This keeper uses both the ukava coin and a separate akava balance to manage the
|
|
// extra percision needed by the evm.
|
|
type EvmBankKeeper struct {
|
|
akavaKeeper Keeper
|
|
bk types.BankKeeper
|
|
ak types.AccountKeeper
|
|
}
|
|
|
|
func NewEvmBankKeeper(akavaKeeper Keeper, bk types.BankKeeper, ak types.AccountKeeper) EvmBankKeeper {
|
|
return EvmBankKeeper{
|
|
akavaKeeper: akavaKeeper,
|
|
bk: bk,
|
|
ak: ak,
|
|
}
|
|
}
|
|
|
|
// GetBalance returns the total **spendable** balance of akava for a given account by address.
|
|
func (k EvmBankKeeper) GetBalance(ctx sdk.Context, addr sdk.AccAddress, denom string) sdk.Coin {
|
|
if denom != EvmDenom {
|
|
panic(fmt.Errorf("only evm denom %s is supported by EvmBankKeeper", EvmDenom))
|
|
}
|
|
|
|
spendableCoins := k.bk.SpendableCoins(ctx, addr)
|
|
ukava := spendableCoins.AmountOf(CosmosDenom)
|
|
akava := k.akavaKeeper.GetBalance(ctx, addr)
|
|
total := ukava.Mul(ConversionMultiplier).Add(akava)
|
|
return sdk.NewCoin(EvmDenom, total)
|
|
}
|
|
|
|
// SendCoins transfers akava coins from a AccAddress to an AccAddress.
|
|
func (k EvmBankKeeper) SendCoins(ctx sdk.Context, senderAddr sdk.AccAddress, recipientAddr sdk.AccAddress, amt sdk.Coins) error {
|
|
// SendCoins method is not used by the evm module, but is required by the
|
|
// evmtypes.BankKeeper interface. This must be updated if the evm module
|
|
// is updated to use SendCoins.
|
|
panic("not implemented")
|
|
}
|
|
|
|
// SendCoinsFromModuleToAccount transfers akava coins from a ModuleAccount to an AccAddress.
|
|
// It will panic if the module account does not exist. An error is returned if the recipient
|
|
// address is black-listed or if sending the tokens fails.
|
|
func (k EvmBankKeeper) SendCoinsFromModuleToAccount(ctx sdk.Context, senderModule string, recipientAddr sdk.AccAddress, amt sdk.Coins) error {
|
|
ukava, akava, err := SplitAkavaCoins(amt)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
if ukava.Amount.IsPositive() {
|
|
if err := k.bk.SendCoinsFromModuleToAccount(ctx, senderModule, recipientAddr, sdk.NewCoins(ukava)); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
senderAddr := k.GetModuleAddress(senderModule)
|
|
if err := k.ConvertOneUkavaToAkavaIfNeeded(ctx, senderAddr, akava); err != nil {
|
|
return err
|
|
}
|
|
|
|
if err := k.akavaKeeper.SendBalance(ctx, senderAddr, recipientAddr, akava); err != nil {
|
|
return err
|
|
}
|
|
|
|
return k.ConvertAkavaToUkava(ctx, recipientAddr)
|
|
}
|
|
|
|
// SendCoinsFromAccountToModule transfers akava coins from an AccAddress to a ModuleAccount.
|
|
// It will panic if the module account does not exist.
|
|
func (k EvmBankKeeper) SendCoinsFromAccountToModule(ctx sdk.Context, senderAddr sdk.AccAddress, recipientModule string, amt sdk.Coins) error {
|
|
ukava, akavaNeeded, err := SplitAkavaCoins(amt)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
if ukava.IsPositive() {
|
|
if err := k.bk.SendCoinsFromAccountToModule(ctx, senderAddr, recipientModule, sdk.NewCoins(ukava)); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
if err := k.ConvertOneUkavaToAkavaIfNeeded(ctx, senderAddr, akavaNeeded); err != nil {
|
|
return err
|
|
}
|
|
|
|
recipientAddr := k.GetModuleAddress(recipientModule)
|
|
if err := k.akavaKeeper.SendBalance(ctx, senderAddr, recipientAddr, akavaNeeded); err != nil {
|
|
return err
|
|
}
|
|
|
|
return k.ConvertAkavaToUkava(ctx, recipientAddr)
|
|
}
|
|
|
|
// MintCoins mints akava coins by minting the equivalent ukava coins and any remaining akava coins.
|
|
// It will panic if the module account does not exist or is unauthorized.
|
|
func (k EvmBankKeeper) MintCoins(ctx sdk.Context, moduleName string, amt sdk.Coins) error {
|
|
ukava, akava, err := SplitAkavaCoins(amt)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
if ukava.IsPositive() {
|
|
if err := k.bk.MintCoins(ctx, moduleName, sdk.NewCoins(ukava)); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
recipientAddr := k.GetModuleAddress(moduleName)
|
|
if err := k.akavaKeeper.AddBalance(ctx, recipientAddr, akava); err != nil {
|
|
return err
|
|
}
|
|
|
|
return k.ConvertAkavaToUkava(ctx, recipientAddr)
|
|
}
|
|
|
|
// BurnCoins burns akava coins by burning the equivalent ukava coins and any remaining akava coins.
|
|
// It will panic if the module account does not exist or is unauthorized.
|
|
func (k EvmBankKeeper) BurnCoins(ctx sdk.Context, moduleName string, amt sdk.Coins) error {
|
|
ukava, akava, err := SplitAkavaCoins(amt)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
if ukava.IsPositive() {
|
|
if err := k.bk.BurnCoins(ctx, moduleName, sdk.NewCoins(ukava)); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
moduleAddr := k.GetModuleAddress(moduleName)
|
|
if err := k.ConvertOneUkavaToAkavaIfNeeded(ctx, moduleAddr, akava); err != nil {
|
|
return err
|
|
}
|
|
|
|
return k.akavaKeeper.RemoveBalance(ctx, moduleAddr, akava)
|
|
}
|
|
|
|
// ConvertOneUkavaToAkavaIfNeeded converts 1 ukava to akava for an address if
|
|
// its akava balance is smaller than the akavaNeeded amount.
|
|
func (k EvmBankKeeper) ConvertOneUkavaToAkavaIfNeeded(ctx sdk.Context, addr sdk.AccAddress, akavaNeeded sdkmath.Int) error {
|
|
akavaBal := k.akavaKeeper.GetBalance(ctx, addr)
|
|
if akavaBal.GTE(akavaNeeded) {
|
|
return nil
|
|
}
|
|
|
|
ukavaToStore := sdk.NewCoins(sdk.NewCoin(CosmosDenom, sdk.OneInt()))
|
|
if err := k.bk.SendCoinsFromAccountToModule(ctx, addr, types.ModuleName, ukavaToStore); err != nil {
|
|
return err
|
|
}
|
|
|
|
// add 1ukava equivalent of akava to addr
|
|
akavaToReceive := ConversionMultiplier
|
|
if err := k.akavaKeeper.AddBalance(ctx, addr, akavaToReceive); err != nil {
|
|
return err
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// ConvertAkavaToUkava converts all available akava to ukava for a given AccAddress.
|
|
func (k EvmBankKeeper) ConvertAkavaToUkava(ctx sdk.Context, addr sdk.AccAddress) error {
|
|
totalAkava := k.akavaKeeper.GetBalance(ctx, addr)
|
|
ukava, _, err := SplitAkavaCoins(sdk.NewCoins(sdk.NewCoin(EvmDenom, totalAkava)))
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
// do nothing if account does not have enough akava for a single ukava
|
|
ukavaToReceive := ukava.Amount
|
|
if !ukavaToReceive.IsPositive() {
|
|
return nil
|
|
}
|
|
|
|
// remove akava used for converting to ukava
|
|
akavaToBurn := ukavaToReceive.Mul(ConversionMultiplier)
|
|
finalBal := totalAkava.Sub(akavaToBurn)
|
|
if err := k.akavaKeeper.SetBalance(ctx, addr, finalBal); err != nil {
|
|
return err
|
|
}
|
|
|
|
fromAddr := k.GetModuleAddress(types.ModuleName)
|
|
if err := k.bk.SendCoins(ctx, fromAddr, addr, sdk.NewCoins(ukava)); err != nil {
|
|
return err
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (k EvmBankKeeper) GetModuleAddress(moduleName string) sdk.AccAddress {
|
|
addr := k.ak.GetModuleAddress(moduleName)
|
|
if addr == nil {
|
|
panic(errorsmod.Wrapf(sdkerrors.ErrUnknownAddress, "module account %s does not exist", moduleName))
|
|
}
|
|
return addr
|
|
}
|
|
|
|
// SplitAkavaCoins splits akava coins to the equivalent ukava coins and any remaining akava balance.
|
|
// An error will be returned if the coins are not valid or if the coins are not the akava denom.
|
|
func SplitAkavaCoins(coins sdk.Coins) (sdk.Coin, sdkmath.Int, error) {
|
|
akava := sdk.ZeroInt()
|
|
ukava := sdk.NewCoin(CosmosDenom, sdk.ZeroInt())
|
|
|
|
if len(coins) == 0 {
|
|
return ukava, akava, nil
|
|
}
|
|
|
|
if err := ValidateEvmCoins(coins); err != nil {
|
|
return ukava, akava, err
|
|
}
|
|
|
|
// note: we should always have len(coins) == 1 here since coins cannot have dup denoms after we validate.
|
|
coin := coins[0]
|
|
remainingBalance := coin.Amount.Mod(ConversionMultiplier)
|
|
if remainingBalance.IsPositive() {
|
|
akava = remainingBalance
|
|
}
|
|
ukavaAmount := coin.Amount.Quo(ConversionMultiplier)
|
|
if ukavaAmount.IsPositive() {
|
|
ukava = sdk.NewCoin(CosmosDenom, ukavaAmount)
|
|
}
|
|
|
|
return ukava, akava, nil
|
|
}
|
|
|
|
// ValidateEvmCoins validates the coins from evm is valid and is the EvmDenom (akava).
|
|
func ValidateEvmCoins(coins sdk.Coins) error {
|
|
if len(coins) == 0 {
|
|
return nil
|
|
}
|
|
|
|
// validate that coins are non-negative, sorted, and no dup denoms
|
|
if err := coins.Validate(); err != nil {
|
|
return errorsmod.Wrap(sdkerrors.ErrInvalidCoins, coins.String())
|
|
}
|
|
|
|
// validate that coin denom is akava
|
|
if len(coins) != 1 || coins[0].Denom != EvmDenom {
|
|
errMsg := fmt.Sprintf("invalid evm coin denom, only %s is supported", EvmDenom)
|
|
return errorsmod.Wrap(sdkerrors.ErrInvalidCoins, errMsg)
|
|
}
|
|
|
|
return nil
|
|
}
|