accounts/abi/bind: simplify bindv2: create constructors for contractBinder, tmplContractV2. move some sanitization of values loaded from ABI definition into tmplContractV2 constructor

accounts/abi/bind/bindv2.go

@@ -76,6 +76,18 @@ type contractBinder struct {
 	errorIdentifiers map[string]bool
 }
 
+func newContractBinder(binder *binder) *contractBinder {
+	return &contractBinder{
+		binder,
+		make(map[string]*tmplMethod),
+		make(map[string]*tmplEvent),
+		make(map[string]*tmplError),
+		make(map[string]bool),
+		make(map[string]bool),
+		make(map[string]bool),
+	}
+}
+
 // bindMethod registers a method to be emitted in the bindings.
 // The name, inputs and outputs are normalized.  If any inputs are
 // struct-type their structs are registered to be emitted in the bindings.
@@ -218,16 +230,7 @@ func BindV2(types []string, abis []string, bytecodes []string, pkg string, libs
 			}
 		}
 
-		cb := contractBinder{
-			binder: &b,
-			calls:  make(map[string]*tmplMethod),
-			events: make(map[string]*tmplEvent),
-			errors: make(map[string]*tmplError),
-
-			callIdentifiers:  make(map[string]bool),
-			errorIdentifiers: make(map[string]bool),
-			eventIdentifiers: make(map[string]bool),
-		}
+		cb := newContractBinder(&b)
 		for _, original := range evmABI.Methods {
 			if err := cb.bindMethod(original); err != nil {
 				return "", err
@@ -244,24 +247,8 @@ func BindV2(types []string, abis []string, bytecodes []string, pkg string, libs
 				return "", err
 			}
 		}
-		// Strip any whitespace from the JSON ABI
-		strippedABI := strings.Map(func(r rune) rune {
-			if unicode.IsSpace(r) {
-				return -1
-			}
-			return r
-		}, abis[i])
-		// replace this with a method call to cb (name it BoundContract()?)
-		b.contracts[types[i]] = &tmplContractV2{
-			Type:        abi.ToCamelCase(types[i]),
-			InputABI:    strings.ReplaceAll(strippedABI, "\"", "\\\""),
-			InputBin:    strings.TrimPrefix(strings.TrimSpace(bytecodes[i]), "0x"),
-			Constructor: evmABI.Constructor,
-			Calls:       cb.calls,
-			Events:      cb.events,
-			Errors:      cb.errors,
-			Libraries:   make(map[string]string),
-		}
+
+		b.contracts[types[i]] = newTmplContractV2(types[i], abis[i], bytecodes[i], evmABI.Constructor, cb)
 	}
 
 	invertedLibs := make(map[string]string)

accounts/abi/bind/template.go

@@ -18,6 +18,8 @@ package bind
 
 import (
 	_ "embed"
+	"strings"
+	"unicode"
 
 	"github.com/ethereum/go-ethereum/accounts/abi"
 )
@@ -57,6 +59,26 @@ type tmplContractV2 struct {
 	Errors      map[string]*tmplError  // all errors defined
 }
 
+func newTmplContractV2(typ string, abiStr string, bytecode string, constructor abi.Method, cb *contractBinder) *tmplContractV2 {
+	// Strip any whitespace from the JSON ABI
+	strippedABI := strings.Map(func(r rune) rune {
+		if unicode.IsSpace(r) {
+			return -1
+		}
+		return r
+	}, abiStr)
+	return &tmplContractV2{
+		abi.ToCamelCase(typ),
+		strings.ReplaceAll(strippedABI, "\"", "\\\""),
+		strings.TrimPrefix(strings.TrimSpace(bytecode), "0x"),
+		constructor,
+		cb.calls,
+		cb.events,
+		make(map[string]string),
+		cb.errors,
+	}
+}
+
 type tmplDataV2 struct {
 	Package   string                     // Name of the package to place the generated file in
 	Contracts map[string]*tmplContractV2 // List of contracts to generate into this file