diff --git a/glide.lock b/glide.lock
index 948a5da3ba..6d606a6d63 100644
--- a/glide.lock
+++ b/glide.lock
@@ -90,7 +90,7 @@ imports:
   - app
   - client
 - name: github.com/tendermint/tendermint
-  version: cf0cb9558aaecbf3ddb071eb863df77e55d828ed
+  version: 9a2dd8bc9279ed2a1a4d4f31cc151f8a621cceb3
   subpackages:
   - rpc/core/types
   - types
diff --git a/types/plugin.go b/types/plugin.go
index 09d68d4de0..ab65452cce 100644
--- a/types/plugin.go
+++ b/types/plugin.go
@@ -6,9 +6,15 @@ import (
 )
 
 type Plugin interface {
+
+	// Name of this plugin, should be short.
 	Name() string
-	SetOption(store KVStore, key string, value string) (log string)
+
+	// Run a transaction from ABCI DeliverTx
 	RunTx(store KVStore, ctx CallContext, txBytes []byte) (res abci.Result)
+
+	// Other ABCI message handlers
+	SetOption(store KVStore, key string, value string) (log string)
 	InitChain(store KVStore, vals []*abci.Validator)
 	BeginBlock(store KVStore, height uint64)
 	EndBlock(store KVStore, height uint64) []*abci.Validator
@@ -16,12 +22,10 @@ type Plugin interface {
 
 //----------------------------------------
 
-// CallContext.Caller's coins have been deducted by CallContext.Coins
-// Caller's Sequence has been incremented.
 type CallContext struct {
-	CallerAddress []byte
-	CallerAccount *Account
-	Coins         Coins
+	CallerAddress []byte   // Caller's Address (hash of PubKey)
+	CallerAccount *Account // Caller's Account, w/ fee & TxInputs deducted
+	TxInput       Coins    // The coins that the caller wishes to spend, excluding fees
 }
 
 func NewCallContext(callerAddress []byte, callerAccount *Account, coins Coins) CallContext {