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message_plugin.go
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/
message_plugin.go
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package wasmbinding
import (
"encoding/json"
sdkioerrors "cosmossdk.io/errors"
wasmkeeper "github.com/CosmWasm/wasmd/x/wasm/keeper"
wasmvmtypes "github.com/CosmWasm/wasmvm/types"
sdk "github.com/cosmos/cosmos-sdk/types"
bankkeeper "github.com/cosmos/cosmos-sdk/x/bank/keeper"
"github.com/nephirim/blackfury/wasmbinding/bindings"
tokenfactorykeeper "github.com/nephirim/blackfury/x/tokenfactory/keeper"
tokenfactorytypes "github.com/nephirim/blackfury/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 bindings.TokenFactoryMsg
if err := json.Unmarshal(msg.Custom, &contractMsg); err != nil {
return nil, nil, sdkioerrors.Wrap(err, "TokenFactoryMsg msg")
}
if contractMsg.CreateDenom != nil {
return m.createDenom(ctx, contractAddr, contractMsg.CreateDenom)
}
if contractMsg.MintTokens != nil {
return m.mintTokens(ctx, contractAddr, contractMsg.MintTokens)
}
if contractMsg.ChangeAdmin != nil {
return m.changeAdmin(ctx, contractAddr, contractMsg.ChangeAdmin)
}
if contractMsg.BurnTokens != nil {
return m.burnTokens(ctx, contractAddr, contractMsg.BurnTokens)
}
}
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 *bindings.CreateDenom) ([]sdk.Event, [][]byte, error) {
err := PerformCreateDenom(m.tokenFactory, ctx, contractAddr, createDenom)
if err != nil {
return nil, nil, sdkioerrors.Wrap(err, "perform create denom")
}
return nil, nil, nil
}
// PerformCreateDenom is used with createDenom to create a token denom; validates the msgCreateDenom.
func PerformCreateDenom(f *tokenfactorykeeper.Keeper, ctx sdk.Context, contractAddr sdk.AccAddress, createDenom *bindings.CreateDenom) error {
if createDenom == nil {
return 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 sdkioerrors.Wrap(err, "failed validating MsgCreateDenom")
}
// Create denom
_, err := msgServer.CreateDenom(
sdk.WrapSDKContext(ctx),
msgCreateDenom,
)
if err != nil {
return sdkioerrors.Wrap(err, "creating denom")
}
return nil
}
// mintTokens mints tokens of a specified denom to an address.
func (m *CustomMessenger) mintTokens(ctx sdk.Context, contractAddr sdk.AccAddress, mint *bindings.MintTokens) ([]sdk.Event, [][]byte, error) {
err := PerformMint(m.tokenFactory, m.bank, ctx, contractAddr, mint)
if err != nil {
return nil, nil, sdkioerrors.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 *bindings.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 sdkioerrors.Wrap(err, "minting coins from message")
}
err = b.SendCoins(ctx, contractAddr, rcpt, sdk.NewCoins(coin))
if err != nil {
return sdkioerrors.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 *bindings.ChangeAdmin) ([]sdk.Event, [][]byte, error) {
err := ChangeAdmin(m.tokenFactory, ctx, contractAddr, changeAdmin)
if err != nil {
return nil, nil, sdkioerrors.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 *bindings.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 sdkioerrors.Wrap(err, "failed changing admin from message")
}
return nil
}
// burnTokens burns tokens.
func (m *CustomMessenger) burnTokens(ctx sdk.Context, contractAddr sdk.AccAddress, burn *bindings.BurnTokens) ([]sdk.Event, [][]byte, error) {
err := PerformBurn(m.tokenFactory, ctx, contractAddr, burn)
if err != nil {
return nil, nil, sdkioerrors.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 *bindings.BurnTokens) error {
if burn == nil {
return wasmvmtypes.InvalidRequest{Err: "burn token null mint"}
}
if burn.BurnFromAddress != "" && burn.BurnFromAddress != contractAddr.String() {
return wasmvmtypes.InvalidRequest{Err: "BurnFromAddress must be \"\""}
}
coin := sdk.Coin{Denom: burn.Denom, Amount: burn.Amount}
sdkMsg := tokenfactorytypes.NewMsgBurn(contractAddr.String(), coin)
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 sdkioerrors.Wrap(err, "burning coins from message")
}
return nil
}
// GetFullDenom is a function, not method, so the message_plugin can use it.
func GetFullDenom(contract, subDenom string) (string, error) {
// Address validation
if _, err := parseAddress(contract); err != nil {
return "", err
}
fullDenom, err := tokenfactorytypes.GetTokenDenom(contract, subDenom)
if err != nil {
return "", sdkioerrors.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, sdkioerrors.Wrap(err, "address from bech32")
}
err = sdk.VerifyAddressFormat(parsed)
if err != nil {
return nil, sdkioerrors.Wrap(err, "verify address format")
}
return parsed, nil
}