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handler_plugin.go
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/
handler_plugin.go
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package keeper
import (
"github.com/classic-terra/core/v3/custom/auth/ante"
treasurykeeper "github.com/classic-terra/core/v3/x/treasury/keeper"
wasmvmtypes "github.com/CosmWasm/wasmvm/types"
"github.com/cosmos/cosmos-sdk/baseapp"
codectypes "github.com/cosmos/cosmos-sdk/codec/types"
sdk "github.com/cosmos/cosmos-sdk/types"
sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
cosmosante "github.com/cosmos/cosmos-sdk/x/auth/ante"
authkeeper "github.com/cosmos/cosmos-sdk/x/auth/keeper"
bankKeeper "github.com/cosmos/cosmos-sdk/x/bank/keeper"
wasmkeeper "github.com/CosmWasm/wasmd/x/wasm/keeper"
wasmtypes "github.com/CosmWasm/wasmd/x/wasm/types"
)
// msgEncoder is an extension point to customize encodings
type msgEncoder interface {
// Encode converts wasmvm message to n cosmos message types
Encode(ctx sdk.Context, contractAddr sdk.AccAddress, contractIBCPortID string, msg wasmvmtypes.CosmosMsg) ([]sdk.Msg, error)
}
// MessageRouter ADR 031 request type routing
type MessageRouter interface {
Handler(msg sdk.Msg) baseapp.MsgServiceHandler
}
// SDKMessageHandler can handles messages that can be encoded into sdk.Message types and routed.
type SDKMessageHandler struct {
router MessageRouter
encoders msgEncoder
treasuryKeeper treasurykeeper.Keeper
accountKeeper authkeeper.AccountKeeper
bankKeeper bankKeeper.Keeper
}
func NewMessageHandler(
router MessageRouter,
ics4Wrapper wasmtypes.ICS4Wrapper,
channelKeeper wasmtypes.ChannelKeeper,
capabilityKeeper wasmtypes.CapabilityKeeper,
bankKeeper bankKeeper.Keeper,
treasuryKeeper treasurykeeper.Keeper,
accountKeeper authkeeper.AccountKeeper,
unpacker codectypes.AnyUnpacker,
portSource wasmtypes.ICS20TransferPortSource,
customEncoders ...*wasmkeeper.MessageEncoders,
) wasmkeeper.Messenger {
encoders := wasmkeeper.DefaultEncoders(unpacker, portSource)
for _, e := range customEncoders {
encoders = encoders.Merge(e)
}
return wasmkeeper.NewMessageHandlerChain(
NewSDKMessageHandler(router, encoders, treasuryKeeper, accountKeeper, bankKeeper),
wasmkeeper.NewIBCRawPacketHandler(ics4Wrapper, channelKeeper, capabilityKeeper),
wasmkeeper.NewBurnCoinMessageHandler(bankKeeper),
)
}
func NewSDKMessageHandler(router MessageRouter, encoders msgEncoder, treasuryKeeper treasurykeeper.Keeper, accountKeeper authkeeper.AccountKeeper, bankKeeper bankKeeper.Keeper) SDKMessageHandler {
return SDKMessageHandler{
router: router,
encoders: encoders,
treasuryKeeper: treasuryKeeper,
accountKeeper: accountKeeper,
bankKeeper: bankKeeper,
}
}
func (h SDKMessageHandler) DispatchMsg(ctx sdk.Context, contractAddr sdk.AccAddress, contractIBCPortID string, msg wasmvmtypes.CosmosMsg) (events []sdk.Event, data [][]byte, err error) {
sdkMsgs, err := h.encoders.Encode(ctx, contractAddr, contractIBCPortID, msg)
if err != nil {
return nil, nil, err
}
for _, sdkMsg := range sdkMsgs {
// Charge tax on result msg
taxes := ante.FilterMsgAndComputeTax(ctx, h.treasuryKeeper, sdkMsg)
if !taxes.IsZero() {
eventManager := sdk.NewEventManager()
contractAcc := h.accountKeeper.GetAccount(ctx, contractAddr)
if err := cosmosante.DeductFees(h.bankKeeper, ctx.WithEventManager(eventManager), contractAcc, taxes); err != nil {
return nil, nil, err
}
events = eventManager.Events()
}
res, err := h.handleSdkMessage(ctx, contractAddr, sdkMsg)
if err != nil {
return nil, nil, err
}
// append data
data = append(data, res.Data)
// append events
sdkEvents := make([]sdk.Event, len(res.Events))
for i := range res.Events {
sdkEvents[i] = sdk.Event(res.Events[i])
}
events = append(events, sdkEvents...)
}
return events, data, nil
}
func (h SDKMessageHandler) handleSdkMessage(ctx sdk.Context, contractAddr sdk.Address, msg sdk.Msg) (*sdk.Result, error) {
if err := msg.ValidateBasic(); err != nil {
return nil, err
}
// make sure this account can send it
for _, acct := range msg.GetSigners() {
if !acct.Equals(contractAddr) {
return nil, sdkerrors.Wrap(sdkerrors.ErrUnauthorized, "contract doesn't have permission")
}
}
// find the handler and execute it
if handler := h.router.Handler(msg); handler != nil {
// ADR 031 request type routing
msgResult, err := handler(ctx, msg)
return msgResult, err
}
// legacy sdk.Msg routing
// Assuming that the app developer has migrated all their Msgs to
// proto messages and has registered all `Msg services`, then this
// path should never be called, because all those Msgs should be
// registered within the `msgServiceRouter` already.
return nil, sdkerrors.Wrapf(sdkerrors.ErrUnknownRequest, "can't route message %+v", msg)
}