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-rw-r--r--eth/tracers/tracers.go53
1 files changed, 53 insertions, 0 deletions
diff --git a/eth/tracers/tracers.go b/eth/tracers/tracers.go
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+// Copyright 2017 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 tracers is a collection of JavaScript transaction tracers.
+package tracers
+
+import (
+ "strings"
+ "unicode"
+
+ "github.com/ethereum/go-ethereum/eth/tracers/internal/tracers"
+)
+
+// all contains all the built in JavaScript tracers by name.
+var all = make(map[string]string)
+
+// camel converts a snake cased input string into a camel cased output.
+func camel(str string) string {
+ pieces := strings.Split(str, "_")
+ for i := 1; i < len(pieces); i++ {
+ pieces[i] = string(unicode.ToUpper(rune(pieces[i][0]))) + pieces[i][1:]
+ }
+ return strings.Join(pieces, "")
+}
+
+// init retrieves the JavaScript transaction tracers included in go-ethereum.
+func init() {
+ for _, file := range tracers.AssetNames() {
+ name := camel(strings.TrimSuffix(file, ".js"))
+ all[name] = string(tracers.MustAsset(file))
+ }
+}
+
+// tracer retrieves a specific JavaScript tracer by name.
+func tracer(name string) (string, bool) {
+ if tracer, ok := all[name]; ok {
+ return tracer, true
+ }
+ return "", false
+}