accounts/abi/bind, cmd/abigen: Go API generator around an EVM ABI

1 files changed, 71 insertions, 0 deletions

diff --git a/cmd/abigen/main.go b/cmd/abigen/main.go
new file mode 100644
index 000000000..d36784de8
--- /dev/null
+++ b/cmd/abigen/main.go
@@ -0,0 +1,71 @@
+// Copyright 2016 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+package main
+
+import (
+	"flag"
+	"fmt"
+	"io/ioutil"
+	"os"
+
+	"github.com/ethereum/go-ethereum/accounts/abi/bind"
+)
+
+var (
+	abiFlag = flag.String("abi", "", "Path to the Ethereum contract ABI json to bind")
+	pkgFlag = flag.String("pkg", "", "Go package name to generate the binding into")
+	typFlag = flag.String("type", "", "Go struct name for the binding (default = package name)")
+	outFlag = flag.String("out", "", "Output path for the generated binding")
+)
+
+func main() {
+	// Parse and validate the command line flags
+	flag.Parse()
+
+	if *abiFlag == "" {
+		fmt.Printf("No contract ABI path specified (--abi)\n")
+		os.Exit(-1)
+	}
+	if *pkgFlag == "" {
+		fmt.Printf("No destination Go package specified (--pkg)\n")
+		os.Exit(-1)
+	}
+	// Generate the contract binding
+	in, err := ioutil.ReadFile(*abiFlag)
+	if err != nil {
+		fmt.Printf("Failed to read input ABI: %v\n", err)
+		os.Exit(-1)
+	}
+	kind := *typFlag
+	if kind == "" {
+		kind = *pkgFlag
+	}
+	code, err := bind.Bind(string(in), *pkgFlag, kind)
+	if err != nil {
+		fmt.Printf("Failed to generate ABI binding: %v\n", err)
+		os.Exit(-1)
+	}
+	// Either flush it out to a file or display on the standard output
+	if *outFlag == "" {
+		fmt.Printf("%s\n", code)
+		return
+	}
+	if err := ioutil.WriteFile(*outFlag, []byte(code), 0600); err != nil {
+		fmt.Printf("Failed to write ABI binding: %v\n", err)
+		os.Exit(-1)
+	}
+}