accounts/abi: begin tagging fields in structs

Signed-off-by: RJ Catalano <rj@monax.io>

accounts/abi/abi.go

@@ -32,12 +32,14 @@ import (
 // invokable methods. It will allow you to type check function calls and
 // packs data accordingly.
 type ABI struct {
-	Constructor Method
-	Methods     map[string]Method
-	Events      map[string]Event
+	Constructor Method            `json:"constructor"`
+	Fallback    Method            `json:"fallback"`
+	Methods     map[string]Method `json:"function"`
+	Events      map[string]Event  `json:"event"`
 }
 
 // JSON returns a parsed ABI interface and error if it failed.
+// Note [RJ] - Can we deprecate this?
 func JSON(reader io.Reader) (ABI, error) {
 	dec := json.NewDecoder(reader)
 
@@ -372,46 +374,3 @@ func (abi ABI) Unpack(v interface{}, name string, output []byte) error {
 
 	return nil
 }
-
-func (abi *ABI) UnmarshalJSON(data []byte) error {
-	var fields []struct {
-		Type      string
-		Name      string
-		Constant  bool
-		Indexed   bool
-		Anonymous bool
-		Inputs    []Argument
-		Outputs   []Argument
-	}
-
-	if err := json.Unmarshal(data, &fields); err != nil {
-		return err
-	}
-
-	abi.Methods = make(map[string]Method)
-	abi.Events = make(map[string]Event)
-	for _, field := range fields {
-		switch field.Type {
-		case "constructor":
-			abi.Constructor = Method{
-				Inputs: field.Inputs,
-			}
-		// empty defaults to function according to the abi spec
-		case "function", "":
-			abi.Methods[field.Name] = Method{
-				Name:    field.Name,
-				Const:   field.Constant,
-				Inputs:  field.Inputs,
-				Outputs: field.Outputs,
-			}
-		case "event":
-			abi.Events[field.Name] = Event{
-				Name:      field.Name,
-				Anonymous: field.Anonymous,
-				Inputs:    field.Inputs,
-			}
-		}
-	}
-
-	return nil
-}

accounts/abi/argument.go

@@ -24,9 +24,9 @@ import (
 // Argument holds the name of the argument and the corresponding type.
 // Types are used when packing and testing arguments.
 type Argument struct {
-	Name    string
-	Type    Type
-	Indexed bool // indexed is only used by events
+	Name    string `json:"name"`
+	Type    Type   `json:"type"`
+	Indexed bool   `json:"indexed"` // indexed is only used by events
 }
 
 func (a *Argument) UnmarshalJSON(data []byte) error {

accounts/abi/event.go

@@ -28,9 +28,9 @@ import (
 // holds type information (inputs) about the yielded output. Anonymous events
 // don't get the signature canonical representation as the first LOG topic.
 type Event struct {
-	Name      string
-	Anonymous bool
-	Inputs    []Argument
+	Name      string     `json:"name"`
+	Anonymous bool       `json:"anonymous"`
+	Inputs    []Argument `json:"inputs"`
 }
 
 // Id returns the canonical representation of the event's signature used by the

accounts/abi/method.go

@@ -33,10 +33,12 @@ import (
 // be flagged `true`.
 // Input specifies the required input parameters for this gives method.
 type Method struct {
-	Name    string
-	Const   bool
-	Inputs  []Argument
-	Outputs []Argument
+	Name    string     `json:"name"`
+	Const   bool       `json:"constant"`
+	Inputs  []Argument `json:"inputs"`
+	Outputs []Argument `json:"outputs"`
+	//to add
+	// Payable bool `json:"payable"`
 }
 
 func (m Method) pack(method Method, args ...interface{}) ([]byte, error) {