github.com/fibonacci-chain/fbc@v0.0.0-20231124064014-c7636198c1e9/libs/cosmos-sdk/x/bank/handler.go (about)

     1  package bank
     2  
     3  import (
     4  	sdk "github.com/fibonacci-chain/fbc/libs/cosmos-sdk/types"
     5  	sdkerrors "github.com/fibonacci-chain/fbc/libs/cosmos-sdk/types/errors"
     6  	"github.com/fibonacci-chain/fbc/libs/cosmos-sdk/x/bank/internal/keeper"
     7  	"github.com/fibonacci-chain/fbc/libs/cosmos-sdk/x/bank/internal/types"
     8  )
     9  
    10  // NewHandler returns a handler for "bank" type messages.
    11  func NewHandler(k keeper.Keeper) sdk.Handler {
    12  	return func(ctx sdk.Context, msg sdk.Msg) (*sdk.Result, error) {
    13  		ctx.SetEventManager(sdk.NewEventManager())
    14  
    15  		switch msg := msg.(type) {
    16  		case types.MsgSend:
    17  			return handleMsgSend(ctx, k, msg)
    18  
    19  		case types.MsgMultiSend:
    20  			return handleMsgMultiSend(ctx, k, msg)
    21  
    22  		default:
    23  			return nil, sdkerrors.Wrapf(sdkerrors.ErrUnknownRequest, "unrecognized bank message type: %T", msg)
    24  		}
    25  	}
    26  }
    27  
    28  // Handle MsgSend.
    29  func handleMsgSend(ctx sdk.Context, k keeper.Keeper, msg types.MsgSend) (*sdk.Result, error) {
    30  	if !k.GetSendEnabled(ctx) {
    31  		return nil, types.ErrSendDisabled
    32  	}
    33  
    34  	if k.BlacklistedAddr(msg.ToAddress) {
    35  		return nil, sdkerrors.Wrapf(sdkerrors.ErrUnauthorized, "%s is not allowed to receive transactions", msg.ToAddress)
    36  	}
    37  
    38  	err := k.SendCoins(ctx, msg.FromAddress, msg.ToAddress, msg.Amount)
    39  	if err != nil {
    40  		return nil, err
    41  	}
    42  
    43  	ctx.EventManager().EmitEvent(
    44  		sdk.NewEvent(
    45  			sdk.EventTypeMessage,
    46  			sdk.NewAttribute(sdk.AttributeKeyModule, types.AttributeValueCategory),
    47  		),
    48  	)
    49  
    50  	return &sdk.Result{Events: ctx.EventManager().Events()}, nil
    51  }
    52  
    53  // Handle MsgMultiSend.
    54  func handleMsgMultiSend(ctx sdk.Context, k keeper.Keeper, msg types.MsgMultiSend) (*sdk.Result, error) {
    55  	// NOTE: totalIn == totalOut should already have been checked
    56  	if !k.GetSendEnabled(ctx) {
    57  		return nil, types.ErrSendDisabled
    58  	}
    59  
    60  	for _, out := range msg.Outputs {
    61  		if k.BlacklistedAddr(out.Address) {
    62  			return nil, sdkerrors.Wrapf(sdkerrors.ErrUnauthorized, "%s is not allowed to receive transactions", out.Address)
    63  		}
    64  	}
    65  
    66  	err := k.InputOutputCoins(ctx, msg.Inputs, msg.Outputs)
    67  	if err != nil {
    68  		return nil, err
    69  	}
    70  
    71  	ctx.EventManager().EmitEvent(
    72  		sdk.NewEvent(
    73  			sdk.EventTypeMessage,
    74  			sdk.NewAttribute(sdk.AttributeKeyModule, types.AttributeValueCategory),
    75  		),
    76  	)
    77  
    78  	return &sdk.Result{Events: ctx.EventManager().Events()}, nil
    79  }