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proposals.go
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proposals.go
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package keeper
import (
"strings"
sdk "github.com/cosmos/cosmos-sdk/types"
sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
banktypes "github.com/cosmos/cosmos-sdk/x/bank/types"
"github.com/ethereum/go-ethereum/common"
fxtypes "github.com/functionx/fx-core/v3/types"
"github.com/functionx/fx-core/v3/x/erc20/types"
)
// RegisterCoin deploys an erc20 contract and creates the token pair for the existing cosmos coin
func (k Keeper) RegisterCoin(ctx sdk.Context, coinMetadata banktypes.Metadata) (*types.TokenPair, error) {
// check if the conversion is globally enabled
if !k.GetEnableErc20(ctx) {
return nil, sdkerrors.Wrap(types.ErrERC20Disabled, "registration is currently disabled by governance")
}
decimals := getErc20Decimals(coinMetadata)
// check if the denomination already registered
if k.IsDenomRegistered(ctx, coinMetadata.Base) {
return nil, sdkerrors.Wrapf(types.ErrTokenPairAlreadyExists, "coin denomination already registered: %s", coinMetadata.Base)
}
// base not register as alias
if k.IsAliasDenomRegistered(ctx, coinMetadata.Base) {
return nil, sdkerrors.Wrapf(types.ErrInvalidMetadata, "alias %s already registered", coinMetadata.Base)
}
if len(coinMetadata.DenomUnits) > 0 && len(coinMetadata.DenomUnits[0].Aliases) > 0 {
for _, alias := range coinMetadata.DenomUnits[0].Aliases {
if alias == coinMetadata.Base || alias == coinMetadata.Display || alias == coinMetadata.Symbol {
return nil, sdkerrors.Wrap(types.ErrInvalidMetadata, "alias can not equal base, display or symbol")
}
// alias not register as base
if k.IsDenomRegistered(ctx, alias) {
return nil, sdkerrors.Wrapf(types.ErrInvalidMetadata, "denom %s already registered", alias)
}
// alias must not register
if k.IsAliasDenomRegistered(ctx, alias) {
return nil, sdkerrors.Wrapf(types.ErrInvalidMetadata, "alias %s already registered", alias)
}
}
k.SetAliasesDenom(ctx, coinMetadata.Base, coinMetadata.DenomUnits[0].Aliases...)
}
meta, isExist := k.bankKeeper.GetDenomMetaData(ctx, coinMetadata.Base)
if isExist {
if err := types.EqualMetadata(meta, coinMetadata); err != nil {
return nil, sdkerrors.Wrap(types.ErrInvalidMetadata, err.Error())
}
} else {
k.bankKeeper.SetDenomMetaData(ctx, coinMetadata)
}
addr, err := k.DeployUpgradableToken(ctx, k.moduleAddress, coinMetadata.Name, coinMetadata.Symbol, decimals)
if err != nil {
return nil, err
}
pair := types.NewTokenPair(addr, coinMetadata.Base, true, types.OWNER_MODULE)
k.AddTokenPair(ctx, pair)
return &pair, nil
}
// RegisterERC20 creates a cosmos coin and registers the token pair between the coin and the ERC20
func (k Keeper) RegisterERC20(ctx sdk.Context, contract common.Address) (*types.TokenPair, error) {
if !k.GetEnableErc20(ctx) {
return nil, sdkerrors.Wrap(types.ErrERC20Disabled, "registration is currently disabled by governance")
}
if k.IsERC20Registered(ctx, contract) {
return nil, sdkerrors.Wrapf(types.ErrTokenPairAlreadyExists, "token ERC20 contract already registered: %s", contract.String())
}
erc20Data, err := k.QueryERC20(ctx, contract)
if err != nil {
return nil, err
}
// base denomination
base := strings.ToLower(erc20Data.Symbol)
if erc20Data.Symbol == fxtypes.DefaultDenom || k.IsDenomRegistered(ctx, base) {
return nil, sdkerrors.Wrapf(types.ErrInternalTokenPair, "coin denomination already registered: %s", erc20Data.Name)
}
// base not register as alias
if k.IsAliasDenomRegistered(ctx, base) {
return nil, sdkerrors.Wrapf(types.ErrInternalTokenPair, "alias %s already registered", base)
}
_, isExist := k.bankKeeper.GetDenomMetaData(ctx, base) // TODO if register must be equal
if isExist {
// metadata already exists; exit
return nil, sdkerrors.Wrap(types.ErrInternalTokenPair, "denom metadata already registered")
}
// create a bank denom metadata based on the ERC20 token ABI details
// metadata name is should always be the contract since it's the key
// to the bank store
metadata := banktypes.Metadata{
Description: types.CreateDenomDescription(contract.String()),
DenomUnits: []*banktypes.DenomUnit{
{
Denom: base,
Exponent: 0,
},
},
Base: base,
Display: base,
Name: erc20Data.Name,
Symbol: erc20Data.Symbol,
}
// only append metadata if decimals > 0, otherwise validation fails
if erc20Data.Decimals > 0 {
metadata.DenomUnits = append(
metadata.DenomUnits,
&banktypes.DenomUnit{
Denom: erc20Data.Symbol,
Exponent: uint32(erc20Data.Decimals),
},
)
}
if err := metadata.Validate(); err != nil {
return nil, sdkerrors.Wrapf(err, "FIP20 token data is invalid for contract %s", contract.String())
}
k.bankKeeper.SetDenomMetaData(ctx, metadata)
pair := types.NewTokenPair(contract, metadata.Base, true, types.OWNER_EXTERNAL)
k.AddTokenPair(ctx, pair)
return &pair, nil
}
// ToggleRelay toggles relaying for a given token pair
func (k Keeper) ToggleRelay(ctx sdk.Context, token string) (types.TokenPair, error) {
pair, found := k.GetTokenPair(ctx, token)
if !found {
return types.TokenPair{}, sdkerrors.Wrapf(types.ErrTokenPairNotFound, "token '%s' not registered", token)
}
pair.Enabled = !pair.Enabled
k.SetTokenPair(ctx, pair)
return pair, nil
}
// UpdateDenomAlias update denom alias
// if alias not registered, add to denom alias
// if alias registered with denom, remove from denom alias
// if alias registered, but not with denom, return error
func (k Keeper) UpdateDenomAlias(ctx sdk.Context, denom, alias string) (bool, error) {
// check if the denom denomination already registered
if !k.IsDenomRegistered(ctx, denom) {
return false, sdkerrors.Wrapf(types.ErrInvalidDenom, "coin denomination not registered: %s", denom)
}
// check if the alias not registered
if k.IsDenomRegistered(ctx, alias) {
return false, sdkerrors.Wrapf(types.ErrInvalidDenom, "coin denomination already registered: %s", alias)
}
md, found := k.HasDenomAlias(ctx, denom)
if !found {
return false, sdkerrors.Wrapf(types.ErrInvalidMetadata, "denom %s not support update denom aliases", denom)
}
oldAliases := md.DenomUnits[0].Aliases
newAliases := make([]string, 0, len(oldAliases)+1)
registeredDenom, found := k.GetAliasDenom(ctx, alias)
// check if the alias not register denom-alias
if !found {
newAliases = append(oldAliases, alias)
k.SetAliasesDenom(ctx, denom, alias)
} else if registeredDenom == denom {
// check if the denom equal alias registered denom
for _, denomAlias := range oldAliases {
if denomAlias == alias {
continue
}
newAliases = append(newAliases, denomAlias)
}
if len(newAliases) == 0 {
return false, sdkerrors.Wrapf(types.ErrInvalidDenom, "can not remove, alias %s is the last one", alias)
}
k.DeleteAliasesDenom(ctx, alias)
} else {
// check if denom not equal alias registered denom, return error
return false, sdkerrors.Wrapf(types.ErrInvalidDenom,
"alias %s already registered, but denom expected: %s, actual: %s",
alias, registeredDenom, denom)
}
md.DenomUnits[0].Aliases = newAliases
k.bankKeeper.SetDenomMetaData(ctx, md)
addFlag := len(newAliases) > len(oldAliases)
return addFlag, nil
}
func getErc20Decimals(md banktypes.Metadata) (decimals uint8) {
decimals = uint8(0)
for _, du := range md.DenomUnits {
if du.Denom == md.Symbol {
decimals = uint8(du.Exponent)
break
}
}
if md.Base == fxtypes.DefaultDenom {
decimals = fxtypes.DenomUnit
}
return decimals
}