From f4b7a6ce4063fd704a39af59f1a53d4c53f11750 Mon Sep 17 00:00:00 2001
From: Ethan Frey <ethanfrey@users.noreply.github.com>
Date: Wed, 25 Oct 2017 19:54:42 +0200
Subject: [PATCH] Updated tx handling for eyes server

---
 examples/eyes/cmd/eyes/main.go |  9 +++++++--
 examples/eyes/parser.go        | 32 ++++++++++++++++++++++++++++++++
 examples/eyes/tx.go            | 33 +++++++++++++++++++++++++++++++++
 3 files changed, 72 insertions(+), 2 deletions(-)
 create mode 100644 examples/eyes/parser.go
 create mode 100644 examples/eyes/tx.go

diff --git a/examples/eyes/cmd/eyes/main.go b/examples/eyes/cmd/eyes/main.go
index 389950d0a..df30fc921 100644
--- a/examples/eyes/cmd/eyes/main.go
+++ b/examples/eyes/cmd/eyes/main.go
@@ -8,9 +8,11 @@ import (
 
 	sdk "github.com/cosmos/cosmos-sdk"
 	client "github.com/cosmos/cosmos-sdk/client/commands"
-	"github.com/cosmos/cosmos-sdk/modules/eyes"
+	eyesmod "github.com/cosmos/cosmos-sdk/modules/eyes"
 	"github.com/cosmos/cosmos-sdk/server/commands"
 	"github.com/cosmos/cosmos-sdk/util"
+
+	"github.com/cosmos/cosmos-sdk/examples/eyes"
 )
 
 // RootCmd is the entry point for this binary
@@ -25,8 +27,11 @@ func BuildApp() sdk.Handler {
 	return sdk.ChainDecorators(
 		util.Logger{},
 		util.Recovery{},
+		eyes.Parser{},
+		util.Chain{},
 	).WithHandler(
-		eyes.NewHandler())
+		eyesmod.NewHandler(),
+	)
 }
 
 func main() {
diff --git a/examples/eyes/parser.go b/examples/eyes/parser.go
new file mode 100644
index 000000000..b8dd908eb
--- /dev/null
+++ b/examples/eyes/parser.go
@@ -0,0 +1,32 @@
+package eyes
+
+import sdk "github.com/cosmos/cosmos-sdk"
+
+// Parser converts bytes into a tx struct
+type Parser struct{}
+
+var _ sdk.Decorator = Parser{}
+
+// CheckTx makes sure we are on the proper chain
+// - fulfills Decorator interface
+func (c Parser) CheckTx(ctx sdk.Context, store sdk.SimpleDB,
+	txBytes interface{}, next sdk.Checker) (res sdk.CheckResult, err error) {
+
+	tx, err := LoadTx(txBytes.([]byte))
+	if err != nil {
+		return res, err
+	}
+	return next.CheckTx(ctx, store, tx)
+}
+
+// DeliverTx makes sure we are on the proper chain
+// - fulfills Decorator interface
+func (c Parser) DeliverTx(ctx sdk.Context, store sdk.SimpleDB,
+	txBytes interface{}, next sdk.Deliverer) (res sdk.DeliverResult, err error) {
+
+	tx, err := LoadTx(txBytes.([]byte))
+	if err != nil {
+		return res, err
+	}
+	return next.DeliverTx(ctx, store, tx)
+}
diff --git a/examples/eyes/tx.go b/examples/eyes/tx.go
new file mode 100644
index 000000000..41db19504
--- /dev/null
+++ b/examples/eyes/tx.go
@@ -0,0 +1,33 @@
+package eyes
+
+import (
+	wire "github.com/tendermint/go-wire"
+
+	eyesmod "github.com/cosmos/cosmos-sdk/modules/eyes"
+	"github.com/cosmos/cosmos-sdk/util"
+)
+
+// Tx is what is submitted to the chain.
+// This embeds the tx data along with any info we want for
+// decorators (just chain for now to demo)
+type Tx struct {
+	Tx    eyesmod.EyesTx `json:"tx"`
+	Chain util.ChainData `json:"chain"`
+}
+
+// GetTx gets the tx info
+func (e Tx) GetTx() interface{} {
+	return e.Tx
+}
+
+// GetChain gets the chain we wish to perform the tx on
+// (info for decorators)
+func (e Tx) GetChain() util.ChainData {
+	return e.Chain
+}
+
+// LoadTx parses the input data into our blockchain tx structure
+func LoadTx(data []byte) (tx Tx, err error) {
+	err = wire.ReadBinaryBytes(data, &tx)
+	return
+}