Add errors to IBC module

examples/basecoin/app/app_test.go

@@ -271,7 +271,8 @@ func TestQuizMsg(t *testing.T) {
 func TestHandler(t *testing.T) {
 	bapp := newBasecoinApp()
 
-	chainid := "ibcchain"
+	sourceChain := "source-chain"
+	destChain := "dest-chain"
 
 	vals := []abci.Validator{}
 	baseAcc := auth.BaseAccount{
@@ -298,8 +299,8 @@ func TestHandler(t *testing.T) {
 		SrcAddr:   addr1,
 		DestAddr:  addr1,
 		Coins:     coins,
-		SrcChain:  chainid,
-		DestChain: chainid,
+		SrcChain:  sourceChain,
+		DestChain: destChain,
 	}
 
 	transferMsg := ibc.IBCTransferMsg{

types/errors.go

@@ -17,7 +17,7 @@ func (code CodeType) IsOK() bool {
 }
 
 // ABCI Response Codes
-// Base SDK reserves 0 ~ 99.
+// Base SDK reserves 0 - 99.
 const (
 	CodeOK                  CodeType = 0
 	CodeInternal            CodeType = 1

x/bank/errors.go

@@ -8,13 +8,13 @@ import (
 type CodeType = sdk.CodeType
 
 const (
-	// Coin errors reserve 100 ~ 199.
-	CodeInvalidInput      CodeType = 101
-	CodeInvalidOutput     CodeType = 102
-	CodeInvalidAddress    CodeType = 103
-	CodeUnknownAddress    CodeType = 104
-	CodeInsufficientCoins CodeType = 105
-	CodeInvalidCoins      CodeType = 106
+	// Coin errors reserve 100 - 199.
+	CodeInvalidInput      CodeType = 100
+	CodeInvalidOutput     CodeType = 101
+	CodeInvalidAddress    CodeType = 102
+	CodeUnknownAddress    CodeType = 103
+	CodeInsufficientCoins CodeType = 104
+	CodeInvalidCoins      CodeType = 105
 	CodeUnknownRequest    CodeType = sdk.CodeUnknownRequest
 )
 

x/ibc/errors.go

@@ -5,9 +5,43 @@ import (
 )
 
 const (
-	CodeInvalidSequence sdk.CodeType = 201
+	// IBC errors reserve 200 - 299.
+	CodeInvalidSequence sdk.CodeType = 200
+	CodeIdenticalChains sdk.CodeType = 201
+	CodeUnknownRequest  sdk.CodeType = sdk.CodeUnknownRequest
 )
 
-func ErrInvalidSequence() sdk.Error {
-	return sdk.NewError(CodeInvalidSequence, "")
+func codeToDefaultMsg(code sdk.CodeType) string {
+	switch code {
+	case CodeInvalidSequence:
+		return "Invalid IBC packet sequence"
+	case CodeIdenticalChains:
+		return "Source and destination chain cannot be identical"
+	default:
+		return sdk.CodeToDefaultMsg(code)
+	}
+}
+
+func ErrInvalidSequence() sdk.Error {
+	return newError(CodeInvalidSequence, "")
+}
+
+func ErrIdenticalChains() sdk.Error {
+	return newError(CodeIdenticalChains, "")
+}
+
+// -------------------------
+// Helpers
+
+func newError(code sdk.CodeType, msg string) sdk.Error {
+	msg = msgOrDefaultMsg(msg, code)
+	return sdk.NewError(code, msg)
+}
+
+func msgOrDefaultMsg(msg string, code sdk.CodeType) string {
+	if msg != "" {
+		return msg
+	} else {
+		return codeToDefaultMsg(code)
+	}
 }

x/ibc/types.go

@@ -37,36 +37,11 @@ func NewIBCPacket(srcAddr sdk.Address, destAddr sdk.Address, coins sdk.Coins,
 	}
 }
 
-func makeCodec() *wire.Codec { // basecoin/app.MakeCodec()
-	const (
-		msgTypeSend        = 0x1
-		msgTypeIssue       = 0x2
-		msgTypeQuiz        = 0x3
-		msgTypeSetTrend    = 0x4
-		msgTypeIBCTransfer = 0x5
-		msgTypeIBCReceive  = 0x6
-	)
-
-	var _ = oldwire.RegisterInterface(
-		struct{ sdk.Msg }{},
-		oldwire.ConcreteType{bank.SendMsg{}, msgTypeSend},
-		oldwire.ConcreteType{bank.IssueMsg{}, msgTypeIssue},
-		oldwire.ConcreteType{cool.QuizMsg{}, msgTypeQuiz},
-		oldwire.ConcreteType{cool.SetTrendMsg{}, msgTypeSetTrend},
-		oldwire.ConcreteType{IBCTransferMsg{}, msgTypeIBCTransfer},
-		oldwire.ConcreteType{IBCReceiveMsg{}, msgTypeIBCReceive},
-	)
-
-	const accTypeApp = 0x1
-	var _ = oldwire.RegisterInterface(
-		struct{ sdk.Account }{},
-		oldwire.ConcreteType{&types.AppAccount{}, accTypeApp},
-	)
-
-	cdc := wire.NewCodec()
-
-	return cdc
-
+func (ibcp IBCPacket) ValidateBasic() sdk.Error {
+	if ibcp.SrcChain == ibcp.DestChain {
+		return ErrIdenticalChains().Trace("")
+	}
+	return nil
 }
 
 // ----------------------------------
@@ -95,7 +70,7 @@ func (msg IBCTransferMsg) GetSignBytes() []byte {
 }
 
 func (msg IBCTransferMsg) ValidateBasic() sdk.Error {
-	return nil
+	return msg.IBCPacket.ValidateBasic()
 }
 
 // x/bank/tx.go SendMsg.GetSigners()
@@ -132,7 +107,7 @@ func (msg IBCReceiveMsg) GetSignBytes() []byte {
 }
 
 func (msg IBCReceiveMsg) ValidateBasic() sdk.Error {
-	return nil
+	return msg.IBCPacket.ValidateBasic()
 }
 
 // x/bank/tx.go SendMsg.GetSigners()
@@ -146,3 +121,33 @@ func (msg IBCReceiveMsg) GetSigners() []sdk.Address {
 func newCodec() *wire.Codec {
 	return wire.NewCodec()
 }
+
+func makeCodec() *wire.Codec { // basecoin/app.MakeCodec()
+	const (
+		msgTypeSend        = 0x1
+		msgTypeIssue       = 0x2
+		msgTypeQuiz        = 0x3
+		msgTypeSetTrend    = 0x4
+		msgTypeIBCTransfer = 0x5
+		msgTypeIBCReceive  = 0x6
+	)
+
+	var _ = oldwire.RegisterInterface(
+		struct{ sdk.Msg }{},
+		oldwire.ConcreteType{bank.SendMsg{}, msgTypeSend},
+		oldwire.ConcreteType{bank.IssueMsg{}, msgTypeIssue},
+		oldwire.ConcreteType{cool.QuizMsg{}, msgTypeQuiz},
+		oldwire.ConcreteType{cool.SetTrendMsg{}, msgTypeSetTrend},
+		oldwire.ConcreteType{IBCTransferMsg{}, msgTypeIBCTransfer},
+		oldwire.ConcreteType{IBCReceiveMsg{}, msgTypeIBCReceive},
+	)
+
+	const accTypeApp = 0x1
+	var _ = oldwire.RegisterInterface(
+		struct{ sdk.Account }{},
+		oldwire.ConcreteType{&types.AppAccount{}, accTypeApp},
+	)
+
+	cdc := wire.NewCodec()
+	return cdc
+}