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sdk.go
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sdk.go
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//
// Copyright 2019 Insolar Technologies GmbH
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
package sdk
import (
"context"
"encoding/json"
"fmt"
"io/ioutil"
"math/big"
"sync"
"github.com/pkg/errors"
"github.com/insolar/insolar/api/requester"
"github.com/insolar/insolar/bootstrap"
"github.com/insolar/insolar/insolar"
"github.com/insolar/insolar/instrumentation/inslogger"
"github.com/insolar/insolar/platformpolicy"
)
type ringBuffer struct {
sync.Mutex
urls []string
cursor int
}
func (rb *ringBuffer) next() string {
rb.Lock()
defer rb.Unlock()
rb.cursor++
if rb.cursor >= len(rb.urls) {
rb.cursor = 0
}
return rb.urls[rb.cursor]
}
type memberKeys struct {
Private string `json:"private_key"`
Public string `json:"public_key"`
}
// SDK is used to send messages to API
type SDK struct {
adminAPIURLs *ringBuffer
publicAPIURLs *ringBuffer
rootMember *requester.UserConfigJSON
migrationAdminMember *requester.UserConfigJSON
migrationDaemonMembers []*requester.UserConfigJSON
feeMember *requester.UserConfigJSON
logLevel string
}
// NewSDK creates insSDK object
func NewSDK(adminUrls []string, publicUrls []string, memberKeysDirPath string) (*SDK, error) {
adminBuffer := &ringBuffer{urls: adminUrls}
publicBuffer := &ringBuffer{urls: publicUrls}
getMember := func(keyPath string, ref string) (*requester.UserConfigJSON, error) {
rawConf, err := ioutil.ReadFile(keyPath)
if err != nil {
return nil, errors.Wrap(err, "failed to read keys from file")
}
keys := memberKeys{}
err = json.Unmarshal(rawConf, &keys)
if err != nil {
return nil, errors.Wrap(err, "failed to unmarshal keys")
}
return requester.CreateUserConfig(ref, keys.Private, keys.Public)
}
response, err := requester.Info(adminBuffer.next())
if err != nil {
return nil, errors.Wrap(err, "failed to get info")
}
rootMember, err := getMember(memberKeysDirPath+"root_member_keys.json", response.RootMember)
if err != nil {
return nil, errors.Wrap(err, "failed to get root member")
}
migrationAdminMember, err := getMember(memberKeysDirPath+"migration_admin_member_keys.json", response.MigrationAdminMember)
if err != nil {
return nil, errors.Wrap(err, "failed to get migration admin member")
}
feeMember, err := getMember(memberKeysDirPath+"fee_member_keys.json", response.FeeMember)
if err != nil {
return nil, errors.Wrap(err, "failed to get fee member")
}
result := &SDK{
adminAPIURLs: adminBuffer,
publicAPIURLs: publicBuffer,
rootMember: rootMember,
migrationAdminMember: migrationAdminMember,
migrationDaemonMembers: []*requester.UserConfigJSON{},
feeMember: feeMember,
logLevel: "",
}
if len(response.MigrationDaemonMembers) < insolar.GenesisAmountMigrationDaemonMembers {
return nil, errors.New(fmt.Sprintf("need at least '%d' migration daemons", insolar.GenesisAmountActiveMigrationDaemonMembers))
}
for i := 0; i < insolar.GenesisAmountMigrationDaemonMembers; i++ {
m, err := getMember(memberKeysDirPath+bootstrap.GetMigrationDaemonPath(i), response.MigrationDaemonMembers[i])
if err != nil {
return nil, errors.Wrap(err, fmt.Sprintf("failed to get migration daemon member; member's index: '%d'", i))
}
result.migrationDaemonMembers = append(result.migrationDaemonMembers, m)
}
return result, nil
}
func (sdk *SDK) GetFeeMember() Member {
return &CommonMember{
Reference: sdk.feeMember.Caller,
PrivateKey: sdk.feeMember.PrivateKey,
PublicKey: sdk.feeMember.PublicKey,
}
}
func (sdk *SDK) GetMigrationAdminMember() Member {
return &CommonMember{
Reference: sdk.migrationAdminMember.Caller,
PrivateKey: sdk.migrationAdminMember.PrivateKey,
PublicKey: sdk.migrationAdminMember.PublicKey,
}
}
func (sdk *SDK) GetMigrationDaemonMembers() []Member {
r := make([]Member, len(sdk.migrationDaemonMembers))
for i, m := range sdk.migrationDaemonMembers {
r[i] = &CommonMember{
Reference: m.Caller,
PrivateKey: m.PrivateKey,
PublicKey: m.PublicKey,
}
}
return r
}
func (sdk *SDK) SetLogLevel(logLevel string) error {
_, err := insolar.ParseLevel(logLevel)
if err != nil {
return errors.Wrap(err, "invalid log level provided")
}
sdk.logLevel = logLevel
return nil
}
func (sdk *SDK) sendRequest(ctx context.Context, urls *ringBuffer, method string, params map[string]interface{}, userCfg *requester.UserConfigJSON) ([]byte, error) {
reqParams := requester.Params{CallParams: params, CallSite: method, PublicKey: userCfg.PublicKey, LogLevel: sdk.logLevel}
body, err := requester.Send(ctx, urls.next(), userCfg, &reqParams)
if err != nil {
return nil, errors.Wrap(err, "failed to send request")
}
return body, nil
}
func (sdk *SDK) getResponse(body []byte) (*requester.ContractResponse, error) {
res := &requester.ContractResponse{}
err := json.Unmarshal(body, &res)
if err != nil {
return nil, errors.Wrap(err, "problems with unmarshal response")
}
return res, nil
}
func createUserConfig(callerMemberReference string) (*requester.UserConfigJSON, error) {
ks := platformpolicy.NewKeyProcessor()
privateKey, err := ks.GeneratePrivateKey()
if err != nil {
return nil, errors.Wrap(err, "failed to generate private key")
}
privateKeyBytes, err := ks.ExportPrivateKeyPEM(privateKey)
if err != nil {
return nil, errors.Wrap(err, "failed to export private key")
}
privateKeyStr := string(privateKeyBytes)
publicKey, err := ks.ExportPublicKeyPEM(ks.ExtractPublicKey(privateKey))
if err != nil {
return nil, errors.Wrap(err, "failed to extract public key")
}
publicKeyStr := string(publicKey)
return requester.CreateUserConfig(callerMemberReference, privateKeyStr, publicKeyStr)
}
func parseReference(callResult interface{}) (string, error) {
var memberRef string
var contractResultCasted map[string]interface{}
var ok bool
if contractResultCasted, ok = callResult.(map[string]interface{}); !ok {
return "", errors.Errorf("failed to cast result: expected map[string]interface{}, got %T", callResult)
}
if memberRef, ok = contractResultCasted["reference"].(string); !ok {
return "", errors.Errorf("failed to cast reference: expected string, got %T", contractResultCasted["reference"])
}
return memberRef, nil
}
func parseMigrationAddress(callResult interface{}) (string, error) {
var migrationAddress string
var contractResultCasted map[string]interface{}
var ok bool
if contractResultCasted, ok = callResult.(map[string]interface{}); !ok {
return "", errors.Errorf("failed to cast result: expected map[string]interface{}, got %T", callResult)
}
if migrationAddress, ok = contractResultCasted["migrationAddress"].(string); !ok {
return "", errors.Errorf("failed to cast migrationAddress: expected string, got %T", contractResultCasted["migrationAddress"])
}
return migrationAddress, nil
}
// CreateMember api request creates member with new random keys
func (sdk *SDK) CreateMember() (Member, string, error) {
userConfig, err := createUserConfig("")
if err != nil {
return nil, "", errors.Wrap(err, "failed to create user config for request")
}
response, err := sdk.DoRequest(
sdk.publicAPIURLs,
userConfig,
"member.create",
map[string]interface{}{},
)
if err != nil {
return nil, "", errors.Wrap(err, "request was failed ")
}
memberRef, err := parseReference(response.CallResult)
if err != nil {
return nil, "", errors.Wrap(err, "failed to parse call result")
}
return NewMember(memberRef, userConfig.PrivateKey, userConfig.PublicKey), response.TraceID, nil
}
// MigrationCreateMember api request creates migration member with new random keys
func (sdk *SDK) MigrationCreateMember() (Member, string, error) {
userConfig, err := createUserConfig("")
if err != nil {
return nil, "", errors.Wrap(err, "failed to create user config for request")
}
response, err := sdk.DoRequest(
sdk.publicAPIURLs,
userConfig,
"member.migrationCreate",
map[string]interface{}{},
)
if err != nil {
return nil, "", errors.Wrap(err, "request was failed ")
}
memberRef, err := parseReference(response.CallResult)
if err != nil {
return nil, "", errors.Wrap(err, "failed to parse reference")
}
migrationAddress, err := parseMigrationAddress(response.CallResult)
if err != nil {
return nil, "", errors.Wrap(err, "failed to parse migrationAddress")
}
return NewMigrationMember(memberRef, migrationAddress, userConfig.PrivateKey, userConfig.PublicKey), response.TraceID, nil
}
// addMigrationAddresses method add burn addresses
func (sdk *SDK) AddMigrationAddresses(migrationAddresses []string) (string, error) {
userConfig, err := requester.CreateUserConfig(sdk.migrationAdminMember.Caller, sdk.migrationAdminMember.PrivateKey, sdk.migrationAdminMember.PublicKey)
if err != nil {
return "", errors.Wrap(err, "failed to create user config for request")
}
response, err := sdk.DoRequest(
sdk.adminAPIURLs,
userConfig,
"migration.addAddresses",
map[string]interface{}{"migrationAddresses": migrationAddresses},
)
if err != nil {
return "", errors.Wrap(err, "request was failed ")
}
return response.TraceID, nil
}
// ActivateDaemon activate daemon from migration admin
func (sdk *SDK) ActivateDaemon(daemonReference string) (string, error) {
userConfig, err := requester.CreateUserConfig(sdk.migrationAdminMember.Caller, sdk.migrationAdminMember.PrivateKey, sdk.migrationAdminMember.PublicKey)
if err != nil {
return "", errors.Wrap(err, "failed to create user config for request")
}
response, err := sdk.DoRequest(
sdk.adminAPIURLs,
userConfig,
"migration.activateDaemon",
map[string]interface{}{"reference": daemonReference},
)
if err != nil {
return "", errors.Wrap(err, "request was failed ")
}
return response.TraceID, nil
}
// Transfer method send money from one member to another
func (sdk *SDK) Transfer(amount string, from Member, to Member) (string, error) {
userConfig, err := requester.CreateUserConfig(from.GetReference(), from.GetPrivateKey(), from.GetPublicKey())
if err != nil {
return "", errors.Wrap(err, "failed to create user config for request")
}
response, err := sdk.DoRequest(
sdk.publicAPIURLs,
userConfig,
"member.transfer",
map[string]interface{}{"amount": amount, "toMemberReference": to.GetReference()},
)
if err != nil {
return "", errors.Wrap(err, "request was failed ")
}
return response.TraceID, nil
}
// GetBalance returns current balance of the given member.
func (sdk *SDK) GetBalance(m Member) (*big.Int, []interface{}, error) {
userConfig, err := requester.CreateUserConfig(m.GetReference(), m.GetPrivateKey(), m.GetPublicKey())
if err != nil {
return nil, nil, errors.Wrap(err, "failed to create user config for request")
}
response, err := sdk.DoRequest(
sdk.adminAPIURLs,
userConfig,
"member.getBalance",
map[string]interface{}{"reference": m.GetReference()},
)
if err != nil {
return nil, nil, errors.Wrap(err, "request was failed ")
}
balance, ok := new(big.Int).SetString(response.CallResult.(map[string]interface{})["balance"].(string), 10)
if !ok {
return nil, nil, errors.Errorf("can't parse returned balance")
}
deposits, ok := response.CallResult.(map[string]interface{})["deposits"].([]interface{})
if !ok {
return nil, nil, errors.Errorf("can't parse returned deposits")
}
return balance, deposits, nil
}
// Migration method migrate INS from ethereum network to XNS in MainNet
func (sdk *SDK) Migration(daemon Member, ethTxHash string, amount string, migrationAddress string) (string, error) {
userConfig, err := requester.CreateUserConfig(daemon.GetReference(), daemon.GetPrivateKey(), daemon.GetPublicKey())
if err != nil {
return "", errors.Wrap(err, "failed to create user config for request")
}
response, err := sdk.DoRequest(
sdk.adminAPIURLs,
userConfig,
"deposit.migration",
map[string]interface{}{"ethTxHash": ethTxHash, "migrationAddress": migrationAddress, "amount": amount},
)
if err != nil {
return "", errors.Wrap(err, "request was failed ")
}
return response.TraceID, nil
}
func (sdk *SDK) DoRequest(urls *ringBuffer, user *requester.UserConfigJSON, method string, params map[string]interface{}) (*requester.ContractResult, error) {
ctx := inslogger.ContextWithTrace(context.Background(), method)
body, err := sdk.sendRequest(ctx, urls, method, params, user)
if err != nil {
return nil, errors.Wrap(err, "failed to send request")
}
response, err := sdk.getResponse(body)
if err != nil {
return nil, errors.Wrap(err, "failed to get response from body")
}
if response.Error != nil {
return nil, errors.Errorf("Message: %s. Trace: %v. TraceId: %s. RequestRef: %s",
response.Error.Message,
response.Error.Data.Trace,
response.Error.Data.TraceID,
response.Error.Data.RequestReference)
}
return response.Result, nil
}