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51 lines
1.6 KiB
Go
51 lines
1.6 KiB
Go
// Copyright 2021 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package native
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import (
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"encoding/json"
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"github.com/ethereum/go-ethereum/core/vm"
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)
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// Tracer interface extends vm.Tracer and additionally
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// allows collecting the tracing result.
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type Tracer interface {
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vm.Tracer
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GetResult() (json.RawMessage, error)
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}
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// constructor creates a new instance of a Tracer.
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type constructor func() Tracer
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var tracers map[string]constructor = make(map[string]constructor)
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// register makes native tracers in this directory which adhere
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// to the `Tracer` interface available to the rest of the codebase.
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// It is typically invoked in the `init()` function.
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func register(name string, fn constructor) {
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tracers[name] = fn
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}
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// New returns a new instance of a tracer, if one was
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// registered under the given name.
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func New(name string) (Tracer, bool) {
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if fn, ok := tracers[name]; ok {
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return fn(), true
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}
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return nil, false
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}
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