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- // 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 fourbyte
- import (
- "fmt"
- "io/ioutil"
- "strings"
- "testing"
- "github.com/ethereum/go-ethereum/accounts/abi"
- "github.com/ethereum/go-ethereum/common"
- )
- // Tests that all the selectors contained in the 4byte database are valid.
- func TestEmbeddedDatabase(t *testing.T) {
- db, err := New()
- if err != nil {
- t.Fatal(err)
- }
- for id, selector := range db.embedded {
- abistring, err := parseSelector(selector)
- if err != nil {
- t.Errorf("Failed to convert selector to ABI: %v", err)
- continue
- }
- abistruct, err := abi.JSON(strings.NewReader(string(abistring)))
- if err != nil {
- t.Errorf("Failed to parse ABI: %v", err)
- continue
- }
- m, err := abistruct.MethodById(common.Hex2Bytes(id))
- if err != nil {
- t.Errorf("Failed to get method by id (%s): %v", id, err)
- continue
- }
- if m.Sig != selector {
- t.Errorf("Selector mismatch: have %v, want %v", m.Sig, selector)
- }
- }
- }
- // Tests that custom 4byte datasets can be handled too.
- func TestCustomDatabase(t *testing.T) {
- // Create a new custom 4byte database with no embedded component
- tmpdir, err := ioutil.TempDir("", "signer-4byte-test")
- if err != nil {
- t.Fatal(err)
- }
- filename := fmt.Sprintf("%s/4byte_custom.json", tmpdir)
- db, err := NewWithFile(filename)
- if err != nil {
- t.Fatal(err)
- }
- db.embedded = make(map[string]string)
- // Ensure the database is empty, insert and verify
- calldata := common.Hex2Bytes("a52c101edeadbeef")
- if _, err = db.Selector(calldata); err == nil {
- t.Fatalf("Should not find a match on empty database")
- }
- if err = db.AddSelector("send(uint256)", calldata); err != nil {
- t.Fatalf("Failed to save file: %v", err)
- }
- if _, err = db.Selector(calldata); err != nil {
- t.Fatalf("Failed to find a match for abi signature: %v", err)
- }
- // Check that the file as persisted to disk by creating a new instance
- db2, err := NewFromFile(filename)
- if err != nil {
- t.Fatalf("Failed to create new abidb: %v", err)
- }
- if _, err = db2.Selector(calldata); err != nil {
- t.Fatalf("Failed to find a match for persisted abi signature: %v", err)
- }
- }
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