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message_plugin.go
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message_plugin.go
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package bindings
import (
"encoding/json"
wasmkeeper "github.com/CosmWasm/wasmd/x/wasm/keeper"
wasmvmtypes "github.com/CosmWasm/wasmvm/types"
errorsmod "cosmossdk.io/errors"
sdk "github.com/cosmos/cosmos-sdk/types"
sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
bankkeeper "github.com/cosmos/cosmos-sdk/x/bank/keeper"
banktypes "github.com/cosmos/cosmos-sdk/x/bank/types"
bindingstypes "github.com/CosmosContracts/juno/v16/x/tokenfactory/bindings/types"
tokenfactorykeeper "github.com/CosmosContracts/juno/v16/x/tokenfactory/keeper"
tokenfactorytypes "github.com/CosmosContracts/juno/v16/x/tokenfactory/types"
)
// CustomMessageDecorator returns decorator for custom CosmWasm bindings messages
func CustomMessageDecorator(bank *bankkeeper.BaseKeeper, tokenFactory *tokenfactorykeeper.Keeper) func(wasmkeeper.Messenger) wasmkeeper.Messenger {
return func(old wasmkeeper.Messenger) wasmkeeper.Messenger {
return &CustomMessenger{
wrapped: old,
bank: bank,
tokenFactory: tokenFactory,
}
}
}
type CustomMessenger struct {
wrapped wasmkeeper.Messenger
bank *bankkeeper.BaseKeeper
tokenFactory *tokenfactorykeeper.Keeper
}
var _ wasmkeeper.Messenger = (*CustomMessenger)(nil)
// DispatchMsg executes on the contractMsg.
func (m *CustomMessenger) DispatchMsg(ctx sdk.Context, contractAddr sdk.AccAddress, contractIBCPortID string, msg wasmvmtypes.CosmosMsg) ([]sdk.Event, [][]byte, error) {
if msg.Custom != nil {
// only handle the happy path where this is really creating / minting / swapping ...
// leave everything else for the wrapped version
var contractMsg bindingstypes.TokenFactoryMsg
if err := json.Unmarshal(msg.Custom, &contractMsg); err != nil {
return nil, nil, errorsmod.Wrap(err, "token factory msg")
}
if contractMsg.Token == nil {
return nil, nil, errorsmod.Wrap(sdkerrors.ErrUnknownRequest, "nil token field")
}
tokenMsg := contractMsg.Token
if tokenMsg.CreateDenom != nil {
return m.createDenom(ctx, contractAddr, tokenMsg.CreateDenom)
}
if tokenMsg.MintTokens != nil {
return m.mintTokens(ctx, contractAddr, tokenMsg.MintTokens)
}
if tokenMsg.ChangeAdmin != nil {
return m.changeAdmin(ctx, contractAddr, tokenMsg.ChangeAdmin)
}
if tokenMsg.BurnTokens != nil {
return m.burnTokens(ctx, contractAddr, tokenMsg.BurnTokens)
}
if tokenMsg.SetMetadata != nil {
return m.setMetadata(ctx, contractAddr, tokenMsg.SetMetadata)
}
if tokenMsg.ForceTransfer != nil {
return m.forceTransfer(ctx, contractAddr, tokenMsg.ForceTransfer)
}
}
return m.wrapped.DispatchMsg(ctx, contractAddr, contractIBCPortID, msg)
}
// createDenom creates a new token denom
func (m *CustomMessenger) createDenom(ctx sdk.Context, contractAddr sdk.AccAddress, createDenom *bindingstypes.CreateDenom) ([]sdk.Event, [][]byte, error) {
bz, err := PerformCreateDenom(m.tokenFactory, m.bank, ctx, contractAddr, createDenom)
if err != nil {
return nil, nil, errorsmod.Wrap(err, "perform create denom")
}
// TODO: double check how this is all encoded to the contract
return nil, [][]byte{bz}, nil
}
// PerformCreateDenom is used with createDenom to create a token denom; validates the msgCreateDenom.
func PerformCreateDenom(f *tokenfactorykeeper.Keeper, b *bankkeeper.BaseKeeper, ctx sdk.Context, contractAddr sdk.AccAddress, createDenom *bindingstypes.CreateDenom) ([]byte, error) {
if createDenom == nil {
return nil, wasmvmtypes.InvalidRequest{Err: "create denom null create denom"}
}
msgServer := tokenfactorykeeper.NewMsgServerImpl(*f)
msgCreateDenom := tokenfactorytypes.NewMsgCreateDenom(contractAddr.String(), createDenom.Subdenom)
if err := msgCreateDenom.ValidateBasic(); err != nil {
return nil, errorsmod.Wrap(err, "failed validating MsgCreateDenom")
}
// Create denom
resp, err := msgServer.CreateDenom(
sdk.WrapSDKContext(ctx),
msgCreateDenom,
)
if err != nil {
return nil, errorsmod.Wrap(err, "creating denom")
}
if createDenom.Metadata != nil {
newDenom := resp.NewTokenDenom
err := PerformSetMetadata(f, b, ctx, contractAddr, newDenom, *createDenom.Metadata)
if err != nil {
return nil, errorsmod.Wrap(err, "setting metadata")
}
}
return resp.Marshal()
}
// mintTokens mints tokens of a specified denom to an address.
func (m *CustomMessenger) mintTokens(ctx sdk.Context, contractAddr sdk.AccAddress, mint *bindingstypes.MintTokens) ([]sdk.Event, [][]byte, error) {
err := PerformMint(m.tokenFactory, m.bank, ctx, contractAddr, mint)
if err != nil {
return nil, nil, errorsmod.Wrap(err, "perform mint")
}
return nil, nil, nil
}
// PerformMint used with mintTokens to validate the mint message and mint through token factory.
func PerformMint(f *tokenfactorykeeper.Keeper, b *bankkeeper.BaseKeeper, ctx sdk.Context, contractAddr sdk.AccAddress, mint *bindingstypes.MintTokens) error {
if mint == nil {
return wasmvmtypes.InvalidRequest{Err: "mint token null mint"}
}
rcpt, err := parseAddress(mint.MintToAddress)
if err != nil {
return err
}
coin := sdk.Coin{Denom: mint.Denom, Amount: mint.Amount}
sdkMsg := tokenfactorytypes.NewMsgMint(contractAddr.String(), coin)
if err = sdkMsg.ValidateBasic(); err != nil {
return err
}
// Mint through token factory / message server
msgServer := tokenfactorykeeper.NewMsgServerImpl(*f)
_, err = msgServer.Mint(sdk.WrapSDKContext(ctx), sdkMsg)
if err != nil {
return errorsmod.Wrap(err, "minting coins from message")
}
if b.BlockedAddr(rcpt) {
return errorsmod.Wrapf(err, "minting coins to blocked address %s", rcpt.String())
}
err = b.SendCoins(ctx, contractAddr, rcpt, sdk.NewCoins(coin))
if err != nil {
return errorsmod.Wrap(err, "sending newly minted coins from message")
}
return nil
}
// changeAdmin changes the admin.
func (m *CustomMessenger) changeAdmin(ctx sdk.Context, contractAddr sdk.AccAddress, changeAdmin *bindingstypes.ChangeAdmin) ([]sdk.Event, [][]byte, error) {
err := ChangeAdmin(m.tokenFactory, ctx, contractAddr, changeAdmin)
if err != nil {
return nil, nil, errorsmod.Wrap(err, "failed to change admin")
}
return nil, nil, nil
}
// ChangeAdmin is used with changeAdmin to validate changeAdmin messages and to dispatch.
func ChangeAdmin(f *tokenfactorykeeper.Keeper, ctx sdk.Context, contractAddr sdk.AccAddress, changeAdmin *bindingstypes.ChangeAdmin) error {
if changeAdmin == nil {
return wasmvmtypes.InvalidRequest{Err: "changeAdmin is nil"}
}
newAdminAddr, err := parseAddress(changeAdmin.NewAdminAddress)
if err != nil {
return err
}
changeAdminMsg := tokenfactorytypes.NewMsgChangeAdmin(contractAddr.String(), changeAdmin.Denom, newAdminAddr.String())
if err := changeAdminMsg.ValidateBasic(); err != nil {
return err
}
msgServer := tokenfactorykeeper.NewMsgServerImpl(*f)
_, err = msgServer.ChangeAdmin(sdk.WrapSDKContext(ctx), changeAdminMsg)
if err != nil {
return errorsmod.Wrap(err, "failed changing admin from message")
}
return nil
}
// burnTokens burns tokens.
func (m *CustomMessenger) burnTokens(ctx sdk.Context, contractAddr sdk.AccAddress, burn *bindingstypes.BurnTokens) ([]sdk.Event, [][]byte, error) {
err := PerformBurn(m.tokenFactory, ctx, contractAddr, burn)
if err != nil {
return nil, nil, errorsmod.Wrap(err, "perform burn")
}
return nil, nil, nil
}
// PerformBurn performs token burning after validating tokenBurn message.
func PerformBurn(f *tokenfactorykeeper.Keeper, ctx sdk.Context, contractAddr sdk.AccAddress, burn *bindingstypes.BurnTokens) error {
if burn == nil {
return wasmvmtypes.InvalidRequest{Err: "burn token null mint"}
}
coin := sdk.Coin{Denom: burn.Denom, Amount: burn.Amount}
sdkMsg := tokenfactorytypes.NewMsgBurn(contractAddr.String(), coin)
if burn.BurnFromAddress != "" {
sdkMsg = tokenfactorytypes.NewMsgBurnFrom(contractAddr.String(), coin, burn.BurnFromAddress)
}
if err := sdkMsg.ValidateBasic(); err != nil {
return err
}
// Burn through token factory / message server
msgServer := tokenfactorykeeper.NewMsgServerImpl(*f)
_, err := msgServer.Burn(sdk.WrapSDKContext(ctx), sdkMsg)
if err != nil {
return errorsmod.Wrap(err, "burning coins from message")
}
return nil
}
// forceTransfer moves tokens.
func (m *CustomMessenger) forceTransfer(ctx sdk.Context, contractAddr sdk.AccAddress, forcetransfer *bindingstypes.ForceTransfer) ([]sdk.Event, [][]byte, error) {
err := PerformForceTransfer(m.tokenFactory, ctx, contractAddr, forcetransfer)
if err != nil {
return nil, nil, errorsmod.Wrap(err, "perform force transfer")
}
return nil, nil, nil
}
// PerformForceTransfer performs token moving after validating tokenForceTransfer message.
func PerformForceTransfer(f *tokenfactorykeeper.Keeper, ctx sdk.Context, contractAddr sdk.AccAddress, forcetransfer *bindingstypes.ForceTransfer) error {
if forcetransfer == nil {
return wasmvmtypes.InvalidRequest{Err: "force transfer null"}
}
_, err := parseAddress(forcetransfer.FromAddress)
if err != nil {
return err
}
_, err = parseAddress(forcetransfer.ToAddress)
if err != nil {
return err
}
coin := sdk.Coin{Denom: forcetransfer.Denom, Amount: forcetransfer.Amount}
sdkMsg := tokenfactorytypes.NewMsgForceTransfer(contractAddr.String(), coin, forcetransfer.FromAddress, forcetransfer.ToAddress)
if err := sdkMsg.ValidateBasic(); err != nil {
return err
}
// Transfer through token factory / message server
msgServer := tokenfactorykeeper.NewMsgServerImpl(*f)
_, err = msgServer.ForceTransfer(sdk.WrapSDKContext(ctx), sdkMsg)
if err != nil {
return errorsmod.Wrap(err, "force transferring from message")
}
return nil
}
// createDenom creates a new token denom
func (m *CustomMessenger) setMetadata(ctx sdk.Context, contractAddr sdk.AccAddress, setMetadata *bindingstypes.SetMetadata) ([]sdk.Event, [][]byte, error) {
err := PerformSetMetadata(m.tokenFactory, m.bank, ctx, contractAddr, setMetadata.Denom, setMetadata.Metadata)
if err != nil {
return nil, nil, errorsmod.Wrap(err, "perform create denom")
}
return nil, nil, nil
}
// PerformSetMetadata is used with setMetadata to add new metadata
// It also is called inside CreateDenom if optional metadata field is set
func PerformSetMetadata(f *tokenfactorykeeper.Keeper, b *bankkeeper.BaseKeeper, ctx sdk.Context, contractAddr sdk.AccAddress, denom string, metadata bindingstypes.Metadata) error {
// ensure contract address is admin of denom
auth, err := f.GetAuthorityMetadata(ctx, denom)
if err != nil {
return err
}
if auth.Admin != contractAddr.String() {
return wasmvmtypes.InvalidRequest{Err: "only admin can set metadata"}
}
// ensure we are setting proper denom metadata (bank uses Base field, fill it if missing)
if metadata.Base == "" {
metadata.Base = denom
} else if metadata.Base != denom {
// this is the key that we set
return wasmvmtypes.InvalidRequest{Err: "Base must be the same as denom"}
}
// Create and validate the metadata
bankMetadata := WasmMetadataToSdk(metadata)
if err := bankMetadata.Validate(); err != nil {
return err
}
b.SetDenomMetaData(ctx, bankMetadata)
return nil
}
// GetFullDenom is a function, not method, so the message_plugin can use it
func GetFullDenom(contract string, subDenom string) (string, error) {
// Address validation
if _, err := parseAddress(contract); err != nil {
return "", err
}
fullDenom, err := tokenfactorytypes.GetTokenDenom(contract, subDenom)
if err != nil {
return "", errorsmod.Wrap(err, "validate sub-denom")
}
return fullDenom, nil
}
// parseAddress parses address from bech32 string and verifies its format.
func parseAddress(addr string) (sdk.AccAddress, error) {
parsed, err := sdk.AccAddressFromBech32(addr)
if err != nil {
return nil, errorsmod.Wrap(err, "address from bech32")
}
err = sdk.VerifyAddressFormat(parsed)
if err != nil {
return nil, errorsmod.Wrap(err, "verify address format")
}
return parsed, nil
}
func WasmMetadataToSdk(metadata bindingstypes.Metadata) banktypes.Metadata {
denoms := []*banktypes.DenomUnit{}
for _, unit := range metadata.DenomUnits {
denoms = append(denoms, &banktypes.DenomUnit{
Denom: unit.Denom,
Exponent: unit.Exponent,
Aliases: unit.Aliases,
})
}
return banktypes.Metadata{
Description: metadata.Description,
Display: metadata.Display,
Base: metadata.Base,
Name: metadata.Name,
Symbol: metadata.Symbol,
DenomUnits: denoms,
}
}
func SdkMetadataToWasm(metadata banktypes.Metadata) *bindingstypes.Metadata {
denoms := []bindingstypes.DenomUnit{}
for _, unit := range metadata.DenomUnits {
denoms = append(denoms, bindingstypes.DenomUnit{
Denom: unit.Denom,
Exponent: unit.Exponent,
Aliases: unit.Aliases,
})
}
return &bindingstypes.Metadata{
Description: metadata.Description,
Display: metadata.Display,
Base: metadata.Base,
Name: metadata.Name,
Symbol: metadata.Symbol,
DenomUnits: denoms,
}
}