632 lines
18 KiB
Go
632 lines
18 KiB
Go
// Copyright 2018 The go-ethereum Authors
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// This file is part of go-ethereum.
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//
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// go-ethereum is free software: you can redistribute it and/or modify
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// it under the terms of the GNU 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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// go-ethereum 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 General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
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//
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package rules
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import (
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"fmt"
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"math/big"
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"strings"
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"testing"
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"github.com/ethereum/go-ethereum/accounts"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/common/hexutil"
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"github.com/ethereum/go-ethereum/core/types"
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"github.com/ethereum/go-ethereum/internal/ethapi"
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"github.com/ethereum/go-ethereum/signer/core"
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"github.com/ethereum/go-ethereum/signer/storage"
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)
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const JS = `
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/**
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This is an example implementation of a Javascript rule file.
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When the signer receives a request over the external API, the corresponding method is evaluated.
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Three things can happen:
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1. The method returns "Approve". This means the operation is permitted.
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2. The method returns "Reject". This means the operation is rejected.
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3. Anything else; other return values [*], method not implemented or exception occurred during processing. This means
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that the operation will continue to manual processing, via the regular UI method chosen by the user.
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[*] Note: Future version of the ruleset may use more complex json-based returnvalues, making it possible to not
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only respond Approve/Reject/Manual, but also modify responses. For example, choose to list only one, but not all
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accounts in a list-request. The points above will continue to hold for non-json based responses ("Approve"/"Reject").
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**/
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function ApproveListing(request){
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console.log("In js approve listing");
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console.log(request.accounts[3].Address)
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console.log(request.meta.Remote)
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return "Approve"
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}
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function ApproveTx(request){
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console.log("test");
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console.log("from");
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return "Reject";
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}
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function test(thing){
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console.log(thing.String())
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}
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`
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func mixAddr(a string) (*common.MixedcaseAddress, error) {
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return common.NewMixedcaseAddressFromString(a)
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}
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type alwaysDenyUI struct{}
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func (alwaysDenyUI) OnSignerStartup(info core.StartupInfo) {
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}
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func (alwaysDenyUI) ApproveTx(request *core.SignTxRequest) (core.SignTxResponse, error) {
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return core.SignTxResponse{Transaction: request.Transaction, Approved: false, Password: ""}, nil
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}
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func (alwaysDenyUI) ApproveSignData(request *core.SignDataRequest) (core.SignDataResponse, error) {
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return core.SignDataResponse{Approved: false, Password: ""}, nil
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}
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func (alwaysDenyUI) ApproveExport(request *core.ExportRequest) (core.ExportResponse, error) {
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return core.ExportResponse{Approved: false}, nil
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}
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func (alwaysDenyUI) ApproveImport(request *core.ImportRequest) (core.ImportResponse, error) {
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return core.ImportResponse{Approved: false, OldPassword: "", NewPassword: ""}, nil
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}
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func (alwaysDenyUI) ApproveListing(request *core.ListRequest) (core.ListResponse, error) {
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return core.ListResponse{Accounts: nil}, nil
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}
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func (alwaysDenyUI) ApproveNewAccount(request *core.NewAccountRequest) (core.NewAccountResponse, error) {
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return core.NewAccountResponse{Approved: false, Password: ""}, nil
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}
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func (alwaysDenyUI) ShowError(message string) {
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panic("implement me")
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}
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func (alwaysDenyUI) ShowInfo(message string) {
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panic("implement me")
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}
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func (alwaysDenyUI) OnApprovedTx(tx ethapi.SignTransactionResult) {
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panic("implement me")
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}
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func initRuleEngine(js string) (*rulesetUI, error) {
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r, err := NewRuleEvaluator(&alwaysDenyUI{}, storage.NewEphemeralStorage(), storage.NewEphemeralStorage())
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if err != nil {
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return nil, fmt.Errorf("failed to create js engine: %v", err)
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}
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if err = r.Init(js); err != nil {
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return nil, fmt.Errorf("failed to load bootstrap js: %v", err)
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}
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return r, nil
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}
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func TestListRequest(t *testing.T) {
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accs := make([]core.Account, 5)
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for i := range accs {
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addr := fmt.Sprintf("000000000000000000000000000000000000000%x", i)
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acc := core.Account{
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Address: common.BytesToAddress(common.Hex2Bytes(addr)),
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URL: accounts.URL{Scheme: "test", Path: fmt.Sprintf("acc-%d", i)},
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}
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accs[i] = acc
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}
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js := `function ApproveListing(){ return "Approve" }`
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r, err := initRuleEngine(js)
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if err != nil {
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t.Errorf("Couldn't create evaluator %v", err)
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return
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}
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resp, err := r.ApproveListing(&core.ListRequest{
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Accounts: accs,
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Meta: core.Metadata{Remote: "remoteip", Local: "localip", Scheme: "inproc"},
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})
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if len(resp.Accounts) != len(accs) {
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t.Errorf("Expected check to resolve to 'Approve'")
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}
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}
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func TestSignTxRequest(t *testing.T) {
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js := `
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function ApproveTx(r){
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console.log("transaction.from", r.transaction.from);
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console.log("transaction.to", r.transaction.to);
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console.log("transaction.value", r.transaction.value);
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console.log("transaction.nonce", r.transaction.nonce);
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if(r.transaction.from.toLowerCase()=="0x0000000000000000000000000000000000001337"){ return "Approve"}
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if(r.transaction.from.toLowerCase()=="0x000000000000000000000000000000000000dead"){ return "Reject"}
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}`
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r, err := initRuleEngine(js)
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if err != nil {
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t.Errorf("Couldn't create evaluator %v", err)
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return
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}
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to, err := mixAddr("000000000000000000000000000000000000dead")
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if err != nil {
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t.Error(err)
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return
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}
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from, err := mixAddr("0000000000000000000000000000000000001337")
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if err != nil {
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t.Error(err)
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return
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}
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fmt.Printf("to %v", to.Address().String())
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resp, err := r.ApproveTx(&core.SignTxRequest{
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Transaction: core.SendTxArgs{
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From: *from,
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To: to},
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Callinfo: nil,
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Meta: core.Metadata{Remote: "remoteip", Local: "localip", Scheme: "inproc"},
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})
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if err != nil {
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t.Errorf("Unexpected error %v", err)
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}
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if !resp.Approved {
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t.Errorf("Expected check to resolve to 'Approve'")
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}
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}
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type dummyUI struct {
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calls []string
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}
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func (d *dummyUI) ApproveTx(request *core.SignTxRequest) (core.SignTxResponse, error) {
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d.calls = append(d.calls, "ApproveTx")
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return core.SignTxResponse{}, core.ErrRequestDenied
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}
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func (d *dummyUI) ApproveSignData(request *core.SignDataRequest) (core.SignDataResponse, error) {
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d.calls = append(d.calls, "ApproveSignData")
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return core.SignDataResponse{}, core.ErrRequestDenied
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}
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func (d *dummyUI) ApproveExport(request *core.ExportRequest) (core.ExportResponse, error) {
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d.calls = append(d.calls, "ApproveExport")
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return core.ExportResponse{}, core.ErrRequestDenied
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}
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func (d *dummyUI) ApproveImport(request *core.ImportRequest) (core.ImportResponse, error) {
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d.calls = append(d.calls, "ApproveImport")
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return core.ImportResponse{}, core.ErrRequestDenied
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}
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func (d *dummyUI) ApproveListing(request *core.ListRequest) (core.ListResponse, error) {
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d.calls = append(d.calls, "ApproveListing")
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return core.ListResponse{}, core.ErrRequestDenied
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}
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func (d *dummyUI) ApproveNewAccount(request *core.NewAccountRequest) (core.NewAccountResponse, error) {
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d.calls = append(d.calls, "ApproveNewAccount")
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return core.NewAccountResponse{}, core.ErrRequestDenied
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}
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func (d *dummyUI) ShowError(message string) {
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d.calls = append(d.calls, "ShowError")
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}
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func (d *dummyUI) ShowInfo(message string) {
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d.calls = append(d.calls, "ShowInfo")
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}
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func (d *dummyUI) OnApprovedTx(tx ethapi.SignTransactionResult) {
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d.calls = append(d.calls, "OnApprovedTx")
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}
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func (d *dummyUI) OnSignerStartup(info core.StartupInfo) {
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}
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//TestForwarding tests that the rule-engine correctly dispatches requests to the next caller
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func TestForwarding(t *testing.T) {
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js := ""
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ui := &dummyUI{make([]string, 0)}
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jsBackend := storage.NewEphemeralStorage()
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credBackend := storage.NewEphemeralStorage()
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r, err := NewRuleEvaluator(ui, jsBackend, credBackend)
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if err != nil {
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t.Fatalf("Failed to create js engine: %v", err)
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}
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if err = r.Init(js); err != nil {
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t.Fatalf("Failed to load bootstrap js: %v", err)
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}
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r.ApproveSignData(nil)
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r.ApproveTx(nil)
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r.ApproveImport(nil)
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r.ApproveNewAccount(nil)
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r.ApproveListing(nil)
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r.ApproveExport(nil)
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r.ShowError("test")
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r.ShowInfo("test")
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//This one is not forwarded
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r.OnApprovedTx(ethapi.SignTransactionResult{})
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expCalls := 8
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if len(ui.calls) != expCalls {
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t.Errorf("Expected %d forwarded calls, got %d: %s", expCalls, len(ui.calls), strings.Join(ui.calls, ","))
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}
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}
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func TestMissingFunc(t *testing.T) {
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r, err := initRuleEngine(JS)
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if err != nil {
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t.Errorf("Couldn't create evaluator %v", err)
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return
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}
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_, err = r.execute("MissingMethod", "test")
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if err == nil {
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t.Error("Expected error")
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}
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approved, err := r.checkApproval("MissingMethod", nil, nil)
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if err == nil {
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t.Errorf("Expected missing method to yield error'")
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}
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if approved {
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t.Errorf("Expected missing method to cause non-approval")
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}
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fmt.Printf("Err %v", err)
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}
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func TestStorage(t *testing.T) {
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js := `
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function testStorage(){
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storage.Put("mykey", "myvalue")
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a = storage.Get("mykey")
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storage.Put("mykey", ["a", "list"]) // Should result in "a,list"
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a += storage.Get("mykey")
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storage.Put("mykey", {"an": "object"}) // Should result in "[object Object]"
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a += storage.Get("mykey")
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storage.Put("mykey", JSON.stringify({"an": "object"})) // Should result in '{"an":"object"}'
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a += storage.Get("mykey")
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a += storage.Get("missingkey") //Missing keys should result in empty string
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storage.Put("","missing key==noop") // Can't store with 0-length key
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a += storage.Get("") // Should result in ''
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var b = new BigNumber(2)
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var c = new BigNumber(16)//"0xf0",16)
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var d = b.plus(c)
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console.log(d)
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return a
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}
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`
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r, err := initRuleEngine(js)
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if err != nil {
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t.Errorf("Couldn't create evaluator %v", err)
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return
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}
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v, err := r.execute("testStorage", nil)
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if err != nil {
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t.Errorf("Unexpected error %v", err)
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}
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retval, err := v.ToString()
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if err != nil {
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t.Errorf("Unexpected error %v", err)
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}
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exp := `myvaluea,list[object Object]{"an":"object"}`
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if retval != exp {
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t.Errorf("Unexpected data, expected '%v', got '%v'", exp, retval)
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}
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fmt.Printf("Err %v", err)
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}
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const ExampleTxWindow = `
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function big(str){
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if(str.slice(0,2) == "0x"){ return new BigNumber(str.slice(2),16)}
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return new BigNumber(str)
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}
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// Time window: 1 week
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var window = 1000* 3600*24*7;
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// Limit : 1 ether
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var limit = new BigNumber("1e18");
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function isLimitOk(transaction){
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var value = big(transaction.value)
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// Start of our window function
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var windowstart = new Date().getTime() - window;
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var txs = [];
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var stored = storage.Get('txs');
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if(stored != ""){
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txs = JSON.parse(stored)
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}
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// First, remove all that have passed out of the time-window
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var newtxs = txs.filter(function(tx){return tx.tstamp > windowstart});
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console.log(txs, newtxs.length);
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// Secondly, aggregate the current sum
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sum = new BigNumber(0)
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sum = newtxs.reduce(function(agg, tx){ return big(tx.value).plus(agg)}, sum);
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console.log("ApproveTx > Sum so far", sum);
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console.log("ApproveTx > Requested", value.toNumber());
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// Would we exceed weekly limit ?
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return sum.plus(value).lt(limit)
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}
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function ApproveTx(r){
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console.log(r)
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console.log(typeof(r))
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if (isLimitOk(r.transaction)){
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return "Approve"
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}
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return "Nope"
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}
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/**
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* OnApprovedTx(str) is called when a transaction has been approved and signed. The parameter
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* 'response_str' contains the return value that will be sent to the external caller.
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* The return value from this method is ignore - the reason for having this callback is to allow the
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* ruleset to keep track of approved transactions.
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*
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* When implementing rate-limited rules, this callback should be used.
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* If a rule responds with neither 'Approve' nor 'Reject' - the tx goes to manual processing. If the user
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* then accepts the transaction, this method will be called.
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*
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* TLDR; Use this method to keep track of signed transactions, instead of using the data in ApproveTx.
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*/
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function OnApprovedTx(resp){
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var value = big(resp.tx.value)
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var txs = []
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// Load stored transactions
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var stored = storage.Get('txs');
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if(stored != ""){
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txs = JSON.parse(stored)
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}
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// Add this to the storage
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txs.push({tstamp: new Date().getTime(), value: value});
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storage.Put("txs", JSON.stringify(txs));
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}
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`
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func dummyTx(value hexutil.Big) *core.SignTxRequest {
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to, _ := mixAddr("000000000000000000000000000000000000dead")
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from, _ := mixAddr("000000000000000000000000000000000000dead")
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n := hexutil.Uint64(3)
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gas := hexutil.Uint64(21000)
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gasPrice := hexutil.Big(*big.NewInt(2000000))
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return &core.SignTxRequest{
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Transaction: core.SendTxArgs{
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From: *from,
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To: to,
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Value: value,
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Nonce: n,
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GasPrice: gasPrice,
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Gas: gas,
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},
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Callinfo: []core.ValidationInfo{
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{Typ: "Warning", Message: "All your base are bellong to us"},
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},
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Meta: core.Metadata{Remote: "remoteip", Local: "localip", Scheme: "inproc"},
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}
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}
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func dummyTxWithV(value uint64) *core.SignTxRequest {
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v := big.NewInt(0).SetUint64(value)
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h := hexutil.Big(*v)
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return dummyTx(h)
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}
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func dummySigned(value *big.Int) *types.Transaction {
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to := common.HexToAddress("000000000000000000000000000000000000dead")
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gas := uint64(21000)
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gasPrice := big.NewInt(2000000)
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data := make([]byte, 0)
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return types.NewTransaction(3, to, value, gas, gasPrice, data)
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}
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func TestLimitWindow(t *testing.T) {
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r, err := initRuleEngine(ExampleTxWindow)
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if err != nil {
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t.Errorf("Couldn't create evaluator %v", err)
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return
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}
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// 0.3 ether: 429D069189E0000 wei
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v := big.NewInt(0).SetBytes(common.Hex2Bytes("0429D069189E0000"))
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h := hexutil.Big(*v)
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// The first three should succeed
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for i := 0; i < 3; i++ {
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unsigned := dummyTx(h)
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resp, err := r.ApproveTx(unsigned)
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if err != nil {
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t.Errorf("Unexpected error %v", err)
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}
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if !resp.Approved {
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t.Errorf("Expected check to resolve to 'Approve'")
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}
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// Create a dummy signed transaction
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response := ethapi.SignTransactionResult{
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Tx: dummySigned(v),
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Raw: common.Hex2Bytes("deadbeef"),
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}
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r.OnApprovedTx(response)
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}
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// Fourth should fail
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resp, err := r.ApproveTx(dummyTx(h))
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if resp.Approved {
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t.Errorf("Expected check to resolve to 'Reject'")
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}
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}
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// dontCallMe is used as a next-handler that does not want to be called - it invokes test failure
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type dontCallMe struct {
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t *testing.T
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}
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func (d *dontCallMe) OnSignerStartup(info core.StartupInfo) {
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}
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func (d *dontCallMe) ApproveTx(request *core.SignTxRequest) (core.SignTxResponse, error) {
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d.t.Fatalf("Did not expect next-handler to be called")
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return core.SignTxResponse{}, core.ErrRequestDenied
|
|
}
|
|
|
|
func (d *dontCallMe) ApproveSignData(request *core.SignDataRequest) (core.SignDataResponse, error) {
|
|
d.t.Fatalf("Did not expect next-handler to be called")
|
|
return core.SignDataResponse{}, core.ErrRequestDenied
|
|
}
|
|
|
|
func (d *dontCallMe) ApproveExport(request *core.ExportRequest) (core.ExportResponse, error) {
|
|
d.t.Fatalf("Did not expect next-handler to be called")
|
|
return core.ExportResponse{}, core.ErrRequestDenied
|
|
}
|
|
|
|
func (d *dontCallMe) ApproveImport(request *core.ImportRequest) (core.ImportResponse, error) {
|
|
d.t.Fatalf("Did not expect next-handler to be called")
|
|
return core.ImportResponse{}, core.ErrRequestDenied
|
|
}
|
|
|
|
func (d *dontCallMe) ApproveListing(request *core.ListRequest) (core.ListResponse, error) {
|
|
d.t.Fatalf("Did not expect next-handler to be called")
|
|
return core.ListResponse{}, core.ErrRequestDenied
|
|
}
|
|
|
|
func (d *dontCallMe) ApproveNewAccount(request *core.NewAccountRequest) (core.NewAccountResponse, error) {
|
|
d.t.Fatalf("Did not expect next-handler to be called")
|
|
return core.NewAccountResponse{}, core.ErrRequestDenied
|
|
}
|
|
|
|
func (d *dontCallMe) ShowError(message string) {
|
|
d.t.Fatalf("Did not expect next-handler to be called")
|
|
}
|
|
|
|
func (d *dontCallMe) ShowInfo(message string) {
|
|
d.t.Fatalf("Did not expect next-handler to be called")
|
|
}
|
|
|
|
func (d *dontCallMe) OnApprovedTx(tx ethapi.SignTransactionResult) {
|
|
d.t.Fatalf("Did not expect next-handler to be called")
|
|
}
|
|
|
|
//TestContextIsCleared tests that the rule-engine does not retain variables over several requests.
|
|
// if it does, that would be bad since developers may rely on that to store data,
|
|
// instead of using the disk-based data storage
|
|
func TestContextIsCleared(t *testing.T) {
|
|
|
|
js := `
|
|
function ApproveTx(){
|
|
if (typeof foobar == 'undefined') {
|
|
foobar = "Approve"
|
|
}
|
|
console.log(foobar)
|
|
if (foobar == "Approve"){
|
|
foobar = "Reject"
|
|
}else{
|
|
foobar = "Approve"
|
|
}
|
|
return foobar
|
|
}
|
|
`
|
|
ui := &dontCallMe{t}
|
|
r, err := NewRuleEvaluator(ui, storage.NewEphemeralStorage(), storage.NewEphemeralStorage())
|
|
if err != nil {
|
|
t.Fatalf("Failed to create js engine: %v", err)
|
|
}
|
|
if err = r.Init(js); err != nil {
|
|
t.Fatalf("Failed to load bootstrap js: %v", err)
|
|
}
|
|
tx := dummyTxWithV(0)
|
|
r1, err := r.ApproveTx(tx)
|
|
r2, err := r.ApproveTx(tx)
|
|
if r1.Approved != r2.Approved {
|
|
t.Errorf("Expected execution context to be cleared between executions")
|
|
}
|
|
}
|
|
|
|
func TestSignData(t *testing.T) {
|
|
|
|
js := `function ApproveListing(){
|
|
return "Approve"
|
|
}
|
|
function ApproveSignData(r){
|
|
if( r.address.toLowerCase() == "0x694267f14675d7e1b9494fd8d72fefe1755710fa")
|
|
{
|
|
if(r.message.indexOf("bazonk") >= 0){
|
|
return "Approve"
|
|
}
|
|
return "Reject"
|
|
}
|
|
// Otherwise goes to manual processing
|
|
}`
|
|
r, err := initRuleEngine(js)
|
|
if err != nil {
|
|
t.Errorf("Couldn't create evaluator %v", err)
|
|
return
|
|
}
|
|
message := []byte("baz bazonk foo")
|
|
hash, msg := core.SignHash(message)
|
|
raw := hexutil.Bytes(message)
|
|
addr, _ := mixAddr("0x694267f14675d7e1b9494fd8d72fefe1755710fa")
|
|
|
|
fmt.Printf("address %v %v\n", addr.String(), addr.Original())
|
|
resp, err := r.ApproveSignData(&core.SignDataRequest{
|
|
Address: *addr,
|
|
Message: msg,
|
|
Hash: hash,
|
|
Meta: core.Metadata{Remote: "remoteip", Local: "localip", Scheme: "inproc"},
|
|
Rawdata: raw,
|
|
})
|
|
if err != nil {
|
|
t.Fatalf("Unexpected error %v", err)
|
|
}
|
|
if !resp.Approved {
|
|
t.Fatalf("Expected approved")
|
|
}
|
|
}
|