ethdb, rpc: support building on js/wasm (#17709)

The changes allow building WebAssembly applications which use ethclient.Client.
This commit is contained in:
Dmitrij Koniajev 2018-10-16 01:47:25 +03:00 committed by Felix Lange
parent 16e4d0e005
commit 6a7695e367
7 changed files with 236 additions and 68 deletions

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@ -14,6 +14,8 @@
// 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/>.
// +build !js
package ethdb
import (
@ -380,71 +382,3 @@ func (b *ldbBatch) Reset() {
b.b.Reset()
b.size = 0
}
type table struct {
db Database
prefix string
}
// NewTable returns a Database object that prefixes all keys with a given
// string.
func NewTable(db Database, prefix string) Database {
return &table{
db: db,
prefix: prefix,
}
}
func (dt *table) Put(key []byte, value []byte) error {
return dt.db.Put(append([]byte(dt.prefix), key...), value)
}
func (dt *table) Has(key []byte) (bool, error) {
return dt.db.Has(append([]byte(dt.prefix), key...))
}
func (dt *table) Get(key []byte) ([]byte, error) {
return dt.db.Get(append([]byte(dt.prefix), key...))
}
func (dt *table) Delete(key []byte) error {
return dt.db.Delete(append([]byte(dt.prefix), key...))
}
func (dt *table) Close() {
// Do nothing; don't close the underlying DB.
}
type tableBatch struct {
batch Batch
prefix string
}
// NewTableBatch returns a Batch object which prefixes all keys with a given string.
func NewTableBatch(db Database, prefix string) Batch {
return &tableBatch{db.NewBatch(), prefix}
}
func (dt *table) NewBatch() Batch {
return &tableBatch{dt.db.NewBatch(), dt.prefix}
}
func (tb *tableBatch) Put(key, value []byte) error {
return tb.batch.Put(append([]byte(tb.prefix), key...), value)
}
func (tb *tableBatch) Delete(key []byte) error {
return tb.batch.Delete(append([]byte(tb.prefix), key...))
}
func (tb *tableBatch) Write() error {
return tb.batch.Write()
}
func (tb *tableBatch) ValueSize() int {
return tb.batch.ValueSize()
}
func (tb *tableBatch) Reset() {
tb.batch.Reset()
}

68
ethdb/database_js.go Normal file
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@ -0,0 +1,68 @@
// Copyright 2014 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/>.
// +build js
package ethdb
import (
"errors"
)
var errNotSupported = errors.New("ethdb: not supported")
type LDBDatabase struct {
}
// NewLDBDatabase returns a LevelDB wrapped object.
func NewLDBDatabase(file string, cache int, handles int) (*LDBDatabase, error) {
return nil, errNotSupported
}
// Path returns the path to the database directory.
func (db *LDBDatabase) Path() string {
return ""
}
// Put puts the given key / value to the queue
func (db *LDBDatabase) Put(key []byte, value []byte) error {
return errNotSupported
}
func (db *LDBDatabase) Has(key []byte) (bool, error) {
return false, errNotSupported
}
// Get returns the given key if it's present.
func (db *LDBDatabase) Get(key []byte) ([]byte, error) {
return nil, errNotSupported
}
// Delete deletes the key from the queue and database
func (db *LDBDatabase) Delete(key []byte) error {
return errNotSupported
}
func (db *LDBDatabase) Close() {
}
// Meter configures the database metrics collectors and
func (db *LDBDatabase) Meter(prefix string) {
}
func (db *LDBDatabase) NewBatch() Batch {
return nil
}

25
ethdb/database_js_test.go Normal file
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@ -0,0 +1,25 @@
// Copyright 2014 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/>.
// +build js
package ethdb_test
import (
"github.com/ethereum/go-ethereum/ethdb"
)
var _ ethdb.Database = &ethdb.LDBDatabase{}

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@ -14,6 +14,8 @@
// 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/>.
// +build !js
package ethdb_test
import (

51
ethdb/table.go Normal file
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@ -0,0 +1,51 @@
// Copyright 2014 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 ethdb
type table struct {
db Database
prefix string
}
// NewTable returns a Database object that prefixes all keys with a given
// string.
func NewTable(db Database, prefix string) Database {
return &table{
db: db,
prefix: prefix,
}
}
func (dt *table) Put(key []byte, value []byte) error {
return dt.db.Put(append([]byte(dt.prefix), key...), value)
}
func (dt *table) Has(key []byte) (bool, error) {
return dt.db.Has(append([]byte(dt.prefix), key...))
}
func (dt *table) Get(key []byte) ([]byte, error) {
return dt.db.Get(append([]byte(dt.prefix), key...))
}
func (dt *table) Delete(key []byte) error {
return dt.db.Delete(append([]byte(dt.prefix), key...))
}
func (dt *table) Close() {
// Do nothing; don't close the underlying DB.
}

51
ethdb/table_batch.go Normal file
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@ -0,0 +1,51 @@
// Copyright 2014 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 ethdb
type tableBatch struct {
batch Batch
prefix string
}
// NewTableBatch returns a Batch object which prefixes all keys with a given string.
func NewTableBatch(db Database, prefix string) Batch {
return &tableBatch{db.NewBatch(), prefix}
}
func (dt *table) NewBatch() Batch {
return &tableBatch{dt.db.NewBatch(), dt.prefix}
}
func (tb *tableBatch) Put(key, value []byte) error {
return tb.batch.Put(append([]byte(tb.prefix), key...), value)
}
func (tb *tableBatch) Delete(key []byte) error {
return tb.batch.Delete(append([]byte(tb.prefix), key...))
}
func (tb *tableBatch) Write() error {
return tb.batch.Write()
}
func (tb *tableBatch) ValueSize() int {
return tb.batch.ValueSize()
}
func (tb *tableBatch) Reset() {
tb.batch.Reset()
}

37
rpc/ipc_js.go Normal file
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@ -0,0 +1,37 @@
// Copyright 2015 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/>.
// +build js
package rpc
import (
"context"
"errors"
"net"
)
var errNotSupported = errors.New("rpc: not supported")
// ipcListen will create a named pipe on the given endpoint.
func ipcListen(endpoint string) (net.Listener, error) {
return nil, errNotSupported
}
// newIPCConnection will connect to a named pipe with the given endpoint as name.
func newIPCConnection(ctx context.Context, endpoint string) (net.Conn, error) {
return nil, errNotSupported
}