Modified Abigen to Support Vyper (#19120)

cmd/abigen/main.go

@@ -1,4 +1,4 @@
-// Copyright 2016 The go-ethereum Authors
+// Copyright 2019 The go-ethereum Authors
 // This file is part of go-ethereum.
 //
 // go-ethereum is free software: you can redistribute it and/or modify
@@ -37,6 +37,9 @@ var (
 	solcFlag = flag.String("solc", "solc", "Solidity compiler to use if source builds are requested")
 	excFlag  = flag.String("exc", "", "Comma separated types to exclude from binding")
 
+	vyFlag    = flag.String("vy", "", "Path to the Ethereum contract Vyper source to build and bind")
+	vyperFlag = flag.String("vyper", "vyper", "Vyper compiler to use if source builds are requested")
+
 	pkgFlag  = flag.String("pkg", "", "Package name to generate the binding into")
 	outFlag  = flag.String("out", "", "Output file for the generated binding (default = stdout)")
 	langFlag = flag.String("lang", "go", "Destination language for the bindings (go, java, objc)")
@@ -46,11 +49,14 @@ func main() {
 	// Parse and ensure all needed inputs are specified
 	flag.Parse()
 
-	if *abiFlag == "" && *solFlag == "" {
-		fmt.Printf("No contract ABI (--abi) or Solidity source (--sol) specified\n")
+	if *abiFlag == "" && *solFlag == "" && *vyFlag == "" {
+		fmt.Printf("No contract ABI (--abi), Solidity source (--sol), or Vyper source (--vy) specified\n")
 		os.Exit(-1)
-	} else if (*abiFlag != "" || *binFlag != "" || *typFlag != "") && *solFlag != "" {
-		fmt.Printf("Contract ABI (--abi), bytecode (--bin) and type (--type) flags are mutually exclusive with the Solidity source (--sol) flag\n")
+	} else if (*abiFlag != "" || *binFlag != "" || *typFlag != "") && (*solFlag != "" || *vyFlag != "") {
+		fmt.Printf("Contract ABI (--abi), bytecode (--bin) and type (--type) flags are mutually exclusive with the Solidity (--sol) and Vyper (--vy) flags\n")
+		os.Exit(-1)
+	} else if *solFlag != "" && *vyFlag != "" {
+		fmt.Printf("Solidity (--sol) and Vyper (--vy) flags are mutually exclusive\n")
 		os.Exit(-1)
 	}
 	if *pkgFlag == "" {
@@ -75,7 +81,7 @@ func main() {
 		bins  []string
 		types []string
 	)
-	if *solFlag != "" || (*abiFlag == "-" && *pkgFlag == "") {
+	if *solFlag != "" || *vyFlag != "" || (*abiFlag == "-" && *pkgFlag == "") {
 		// Generate the list of types to exclude from binding
 		exclude := make(map[string]bool)
 		for _, kind := range strings.Split(*excFlag, ",") {
@@ -84,13 +90,21 @@ func main() {
 
 		var contracts map[string]*compiler.Contract
 		var err error
-		if *solFlag != "" {
+
+		switch {
+		case *solFlag != "":
 			contracts, err = compiler.CompileSolidity(*solcFlag, *solFlag)
 			if err != nil {
 				fmt.Printf("Failed to build Solidity contract: %v\n", err)
 				os.Exit(-1)
 			}
-		} else {
+		case *vyFlag != "":
+			contracts, err = compiler.CompileVyper(*vyperFlag, *vyFlag)
+			if err != nil {
+				fmt.Printf("Failed to build Vyper contract: %v\n", err)
+				os.Exit(-1)
+			}
+		default:
 			contracts, err = contractsFromStdin()
 			if err != nil {
 				fmt.Printf("Failed to read input ABIs from STDIN: %v\n", err)
@@ -102,7 +116,11 @@ func main() {
 			if exclude[strings.ToLower(name)] {
 				continue
 			}
-			abi, _ := json.Marshal(contract.Info.AbiDefinition) // Flatten the compiler parse
+			abi, err := json.Marshal(contract.Info.AbiDefinition) // Flatten the compiler parse
+			if err != nil {
+				fmt.Printf("Failed to parse ABIs from compiler output: %v\n", err)
+				os.Exit(-1)
+			}
 			abis = append(abis, string(abi))
 			bins = append(bins, contract.Code)
 

common/compiler/helpers.go

@@ -0,0 +1,64 @@
+// Copyright 2019 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 compiler wraps the Solidity and Vyper compiler executables (solc; vyper).
+package compiler
+
+import (
+	"bytes"
+	"io/ioutil"
+	"regexp"
+)
+
+var versionRegexp = regexp.MustCompile(`([0-9]+)\.([0-9]+)\.([0-9]+)`)
+
+// Contract contains information about a compiled contract, alongside its code and runtime code.
+type Contract struct {
+	Code        string       `json:"code"`
+	RuntimeCode string       `json:"runtime-code"`
+	Info        ContractInfo `json:"info"`
+}
+
+// ContractInfo contains information about a compiled contract, including access
+// to the ABI definition, source mapping, user and developer docs, and metadata.
+//
+// Depending on the source, language version, compiler version, and compiler
+// options will provide information about how the contract was compiled.
+type ContractInfo struct {
+	Source          string      `json:"source"`
+	Language        string      `json:"language"`
+	LanguageVersion string      `json:"languageVersion"`
+	CompilerVersion string      `json:"compilerVersion"`
+	CompilerOptions string      `json:"compilerOptions"`
+	SrcMap          interface{} `json:"srcMap"`
+	SrcMapRuntime   string      `json:"srcMapRuntime"`
+	AbiDefinition   interface{} `json:"abiDefinition"`
+	UserDoc         interface{} `json:"userDoc"`
+	DeveloperDoc    interface{} `json:"developerDoc"`
+	Metadata        string      `json:"metadata"`
+}
+
+func slurpFiles(files []string) (string, error) {
+	var concat bytes.Buffer
+	for _, file := range files {
+		content, err := ioutil.ReadFile(file)
+		if err != nil {
+			return "", err
+		}
+		concat.Write(content)
+	}
+	return concat.String(), nil
+}

common/compiler/solidity.go

@@ -1,4 +1,4 @@
-// Copyright 2015 The go-ethereum Authors
+// Copyright 2019 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
@@ -14,7 +14,7 @@
 // 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 compiler wraps the Solidity compiler executable (solc).
+// Package compiler wraps the Solidity and Vyper compiler executables (solc; vyper).
 package compiler
 
 import (
@@ -22,41 +22,11 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
-	"io/ioutil"
 	"os/exec"
-	"regexp"
 	"strconv"
 	"strings"
 )
 
-var versionRegexp = regexp.MustCompile(`([0-9]+)\.([0-9]+)\.([0-9]+)`)
-
-// Contract contains information about a compiled contract, alongside its code and runtime code.
-type Contract struct {
-	Code        string       `json:"code"`
-	RuntimeCode string       `json:"runtime-code"`
-	Info        ContractInfo `json:"info"`
-}
-
-// ContractInfo contains information about a compiled contract, including access
-// to the ABI definition, source mapping, user and developer docs, and metadata.
-//
-// Depending on the source, language version, compiler version, and compiler
-// options will provide information about how the contract was compiled.
-type ContractInfo struct {
-	Source          string      `json:"source"`
-	Language        string      `json:"language"`
-	LanguageVersion string      `json:"languageVersion"`
-	CompilerVersion string      `json:"compilerVersion"`
-	CompilerOptions string      `json:"compilerOptions"`
-	SrcMap          string      `json:"srcMap"`
-	SrcMapRuntime   string      `json:"srcMapRuntime"`
-	AbiDefinition   interface{} `json:"abiDefinition"`
-	UserDoc         interface{} `json:"userDoc"`
-	DeveloperDoc    interface{} `json:"developerDoc"`
-	Metadata        string      `json:"metadata"`
-}
-
 // Solidity contains information about the solidity compiler.
 type Solidity struct {
 	Path, Version, FullVersion string
@@ -208,15 +178,3 @@ func ParseCombinedJSON(combinedJSON []byte, source string, languageVersion strin
 	}
 	return contracts, nil
 }
-
-func slurpFiles(files []string) (string, error) {
-	var concat bytes.Buffer
-	for _, file := range files {
-		content, err := ioutil.ReadFile(file)
-		if err != nil {
-			return "", err
-		}
-		concat.Write(content)
-	}
-	return concat.String(), nil
-}

common/compiler/solidity_test.go

@@ -1,4 +1,4 @@
-// Copyright 2015 The go-ethereum Authors
+// Copyright 2019 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
@@ -39,7 +39,7 @@ func skipWithoutSolc(t *testing.T) {
 	}
 }
 
-func TestCompiler(t *testing.T) {
+func TestSolidityCompiler(t *testing.T) {
 	skipWithoutSolc(t)
 
 	contracts, err := CompileSolidityString("", testSource)
@@ -67,7 +67,7 @@ func TestCompiler(t *testing.T) {
 	}
 }
 
-func TestCompileError(t *testing.T) {
+func TestSolidityCompileError(t *testing.T) {
 	skipWithoutSolc(t)
 
 	contracts, err := CompileSolidityString("", testSource[4:])

common/compiler/test.v.py

@@ -0,0 +1,3 @@
+@public
+def test():
+    hello: int128

common/compiler/test_bad.v.py

@@ -0,0 +1,3 @@
+lic
+def test():
+    hello: int128

common/compiler/vyper.go

@@ -0,0 +1,144 @@
+// Copyright 2019 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 compiler wraps the Solidity and Vyper compiler executables (solc; vyper).
+package compiler
+
+import (
+	"bytes"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"os/exec"
+	"strconv"
+	"strings"
+)
+
+// Vyper contains information about the vyper compiler.
+type Vyper struct {
+	Path, Version, FullVersion string
+	Major, Minor, Patch        int
+}
+
+func (s *Vyper) makeArgs() []string {
+	p := []string{
+		"-f", "combined_json",
+	}
+	return p
+}
+
+// VyperVersion runs vyper and parses its version output.
+func VyperVersion(vyper string) (*Vyper, error) {
+	if vyper == "" {
+		vyper = "vyper"
+	}
+	var out bytes.Buffer
+	cmd := exec.Command(vyper, "--version")
+	cmd.Stdout = &out
+	err := cmd.Run()
+	if err != nil {
+		return nil, err
+	}
+	matches := versionRegexp.FindStringSubmatch(out.String())
+	if len(matches) != 4 {
+		return nil, fmt.Errorf("can't parse vyper version %q", out.String())
+	}
+	s := &Vyper{Path: cmd.Path, FullVersion: out.String(), Version: matches[0]}
+	if s.Major, err = strconv.Atoi(matches[1]); err != nil {
+		return nil, err
+	}
+	if s.Minor, err = strconv.Atoi(matches[2]); err != nil {
+		return nil, err
+	}
+	if s.Patch, err = strconv.Atoi(matches[3]); err != nil {
+		return nil, err
+	}
+	return s, nil
+}
+
+// CompileVyper compiles all given Vyper source files.
+func CompileVyper(vyper string, sourcefiles ...string) (map[string]*Contract, error) {
+	if len(sourcefiles) == 0 {
+		return nil, errors.New("vyper: no source files")
+	}
+	source, err := slurpFiles(sourcefiles)
+	if err != nil {
+		return nil, err
+	}
+	s, err := VyperVersion(vyper)
+	if err != nil {
+		return nil, err
+	}
+	args := s.makeArgs()
+	cmd := exec.Command(s.Path, append(args, sourcefiles...)...)
+	return s.run(cmd, source)
+}
+
+func (s *Vyper) run(cmd *exec.Cmd, source string) (map[string]*Contract, error) {
+	var stderr, stdout bytes.Buffer
+	cmd.Stderr = &stderr
+	cmd.Stdout = &stdout
+	if err := cmd.Run(); err != nil {
+		return nil, fmt.Errorf("vyper: %v\n%s", err, stderr.Bytes())
+	}
+
+	return ParseVyperJSON(stdout.Bytes(), source, s.Version, s.Version, strings.Join(s.makeArgs(), " "))
+}
+
+// ParseVyperJSON takes the direct output of a vyper --f combined_json run and
+// parses it into a map of string contract name to Contract structs. The
+// provided source, language and compiler version, and compiler options are all
+// passed through into the Contract structs.
+//
+// The vyper output is expected to contain ABI and source mapping.
+//
+// Returns an error if the JSON is malformed or missing data, or if the JSON
+// embedded within the JSON is malformed.
+func ParseVyperJSON(combinedJSON []byte, source string, languageVersion string, compilerVersion string, compilerOptions string) (map[string]*Contract, error) {
+	var output map[string]interface{}
+	if err := json.Unmarshal(combinedJSON, &output); err != nil {
+		return nil, err
+	}
+
+	// Compilation succeeded, assemble and return the contracts.
+	contracts := make(map[string]*Contract)
+	for name, info := range output {
+		// Parse the individual compilation results.
+		if name == "version" {
+			continue
+		}
+		c := info.(map[string]interface{})
+
+		contracts[name] = &Contract{
+			Code:        c["bytecode"].(string),
+			RuntimeCode: c["bytecode_runtime"].(string),
+			Info: ContractInfo{
+				Source:          source,
+				Language:        "Vyper",
+				LanguageVersion: languageVersion,
+				CompilerVersion: compilerVersion,
+				CompilerOptions: compilerOptions,
+				SrcMap:          c["source_map"],
+				SrcMapRuntime:   "",
+				AbiDefinition:   c["abi"],
+				UserDoc:         "",
+				DeveloperDoc:    "",
+				Metadata:        "",
+			},
+		}
+	}
+	return contracts, nil
+}

common/compiler/vyper_test.go

@@ -0,0 +1,71 @@
+// Copyright 2019 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 compiler
+
+import (
+	"os/exec"
+	"testing"
+)
+
+func skipWithoutVyper(t *testing.T) {
+	if _, err := exec.LookPath("vyper"); err != nil {
+		t.Skip(err)
+	}
+}
+
+func TestVyperCompiler(t *testing.T) {
+	skipWithoutVyper(t)
+
+	testSource := []string{"test.v.py"}
+	source, err := slurpFiles(testSource)
+	if err != nil {
+		t.Error("couldn't read test files")
+	}
+	contracts, err := CompileVyper("", testSource...)
+	if err != nil {
+		t.Fatalf("error compiling test.v.py. result %v: %v", contracts, err)
+	}
+	if len(contracts) != 1 {
+		t.Errorf("one contract expected, got %d", len(contracts))
+	}
+	c, ok := contracts["test.v.py"]
+	if !ok {
+		c, ok = contracts["<stdin>:test"]
+		if !ok {
+			t.Fatal("info for contract 'test.v.py' not present in result")
+		}
+	}
+	if c.Code == "" {
+		t.Error("empty code")
+	}
+	if c.Info.Source != source {
+		t.Error("wrong source")
+	}
+	if c.Info.CompilerVersion == "" {
+		t.Error("empty version")
+	}
+}
+
+func TestVyperCompileError(t *testing.T) {
+	skipWithoutVyper(t)
+
+	contracts, err := CompileVyper("", "test_bad.v.py")
+	if err == nil {
+		t.Errorf("error expected compiling test_bad.v.py. got none. result %v", contracts)
+	}
+	t.Logf("error: %v", err)
+}