mirror of https://github.com/certusone/dc4bc.git
246 lines
7.1 KiB
Go
246 lines
7.1 KiB
Go
package main
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import (
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"bytes"
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"context"
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"crypto/md5"
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"encoding/json"
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"fmt"
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"github.com/depools/dc4bc/client/types"
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_ "image/jpeg"
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"io/ioutil"
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"log"
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"net/http"
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"sync"
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"time"
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"github.com/depools/dc4bc/airgapped"
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"github.com/depools/dc4bc/client"
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"github.com/depools/dc4bc/fsm/types/requests"
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"github.com/depools/dc4bc/qr"
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"github.com/depools/dc4bc/storage"
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)
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type node struct {
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client client.Poller
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keyPair *client.KeyPair
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air *airgapped.AirgappedMachine
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listenAddr string
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}
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type OperationsResponse struct {
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Result map[string]*types.Operation `json:"result"`
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}
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func getOperations(url string) (*OperationsResponse, error) {
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resp, err := http.Get(url)
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if err != nil {
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return nil, fmt.Errorf("failed to get operations for node %w", err)
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}
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defer resp.Body.Close()
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responseBody, err := ioutil.ReadAll(resp.Body)
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if err != nil {
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log.Fatalf("failed to read body %v", err)
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}
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var response OperationsResponse
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if err = json.Unmarshal(responseBody, &response); err != nil {
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return nil, fmt.Errorf("failed to unmarshal response: %v", err)
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}
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return &response, nil
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}
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func handleProcessedOperation(url string, operation types.Operation) error {
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operationBz, err := json.Marshal(operation)
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if err != nil {
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return fmt.Errorf("failed to marshal operation: %w", err)
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}
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resp, err := http.Post(url, "application/json", bytes.NewReader(operationBz))
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if err != nil {
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return fmt.Errorf("failed to handle processed operation %w", err)
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}
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defer resp.Body.Close()
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responseBody, err := ioutil.ReadAll(resp.Body)
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if err != nil {
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log.Fatalf("failed to read body %v", err)
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}
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var response client.Response
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if err = json.Unmarshal(responseBody, &response); err != nil {
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return fmt.Errorf("failed to unmarshal response: %w", err)
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}
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if response.ErrorMessage != "" {
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return fmt.Errorf("failed to handle processed operation: %s", response.ErrorMessage)
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}
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return nil
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}
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func (n *node) run() {
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for {
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operationsResponse, err := getOperations(fmt.Sprintf("http://%s/getOperations", n.listenAddr))
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if err != nil {
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log.Fatalf("failed to get operations: %v", err)
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}
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operations := operationsResponse.Result
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if len(operations) == 0 {
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time.Sleep(1 * time.Second)
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continue
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}
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n.client.GetLogger().Log("Got %d Operations from pool", len(operations))
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for _, operation := range operations {
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n.client.GetLogger().Log("Handling operation %s in airgapped", operation.Type)
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processedOperation, err := n.air.HandleOperation(*operation)
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if err != nil {
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n.client.GetLogger().Log("Failed to handle operation: %v", err)
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}
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n.client.GetLogger().Log("Got %d Processed Operations from Airgapped", len(operations))
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n.client.GetLogger().Log("Operation %s handled in airgapped, result event is %s",
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operation.Event, processedOperation.Event)
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if err = handleProcessedOperation(fmt.Sprintf("http://%s/handleProcessedOperationJSON", n.listenAddr),
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processedOperation); err != nil {
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n.client.GetLogger().Log("Failed to handle processed operation: %v", err)
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} else {
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n.client.GetLogger().Log("Successfully handled processed operation %s", processedOperation.Event)
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}
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}
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}
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}
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func main() {
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var numNodes = 4
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var threshold = 3
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var storagePath = "/tmp/dc4bc_storage"
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var nodes = make([]*node, numNodes)
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startingPort := 8080
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for nodeID := 0; nodeID < numNodes; nodeID++ {
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var ctx = context.Background()
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var userName = fmt.Sprintf("node_%d", nodeID)
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var state, err = client.NewLevelDBState(fmt.Sprintf("/tmp/dc4bc_node_%d_state", nodeID))
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if err != nil {
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log.Fatalf("node %d failed to init state: %v\n", nodeID, err)
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}
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stg, err := storage.NewFileStorage(storagePath)
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if err != nil {
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log.Fatalf("node %d failed to init storage: %v\n", nodeID, err)
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}
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keyStore, err := client.NewLevelDBKeyStore(userName, fmt.Sprintf("/tmp/dc4bc_node_%d_key_store", nodeID))
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if err != nil {
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log.Fatalf("Failed to init key store: %v", err)
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}
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keyPair := client.NewKeyPair()
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if err := keyStore.PutKeys(userName, keyPair); err != nil {
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log.Fatalf("Failed to PutKeys: %v\n", err)
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}
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airgappedMachine, err := airgapped.NewAirgappedMachine(fmt.Sprintf("/tmp/dc4bc_node_%d_airgapped_db", nodeID))
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if err != nil {
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log.Fatalf("Failed to create airgapped machine: %v", err)
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}
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clt, err := client.NewClient(
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ctx,
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userName,
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state,
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stg,
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keyStore,
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qr.NewCameraProcessor(),
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)
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if err != nil {
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log.Fatalf("node %d failed to init client: %v\n", nodeID, err)
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}
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airgappedMachine.SetAddress(clt.GetAddr())
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nodes[nodeID] = &node{
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client: clt,
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keyPair: keyPair,
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air: airgappedMachine,
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listenAddr: fmt.Sprintf("localhost:%d", startingPort),
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}
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startingPort++
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}
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// Each node starts to Poll().
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for nodeID, n := range nodes {
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go func(nodeID int, node *node) {
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if err := node.client.StartHTTPServer(node.listenAddr); err != nil {
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log.Fatalf("failed to start HTTP server for nodeID #%d: %v\n", nodeID, err)
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}
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}(nodeID, n)
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go nodes[nodeID].run()
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go func(nodeID int, node client.Poller) {
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if err := node.Poll(); err != nil {
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log.Fatalf("client %d poller failed: %v\n", nodeID, err)
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}
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}(nodeID, n.client)
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log.Printf("client %d started...\n", nodeID)
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}
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// Node1 tells other participants to start DKG.
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var participants []*requests.SignatureProposalParticipantsEntry
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for _, node := range nodes {
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dkgPubKey, err := node.air.GetPubKey().MarshalBinary()
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if err != nil {
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log.Fatalln("failed to get DKG pubKey:", err.Error())
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}
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participants = append(participants, &requests.SignatureProposalParticipantsEntry{
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Addr: node.client.GetAddr(),
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PubKey: node.client.GetPubKey(),
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DkgPubKey: dkgPubKey,
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})
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}
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messageData := requests.SignatureProposalParticipantsListRequest{
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Participants: participants,
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SigningThreshold: threshold,
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CreatedAt: time.Now(),
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}
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messageDataBz, err := json.Marshal(messageData)
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if err != nil {
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log.Fatalf("failed to marshal SignatureProposalParticipantsListRequest: %v\n", err)
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}
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if _, err := http.Post(fmt.Sprintf("http://localhost:%d/startDKG", startingPort-1),
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"application/json", bytes.NewReader(messageDataBz)); err != nil {
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log.Fatalf("failed to send HTTP request to start DKG: %v\n", err)
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}
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// i haven't a better idea to test signing without big changes in the client code
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time.Sleep(10 * time.Second)
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log.Println("Propose message to sign")
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dkgRoundID := md5.Sum(messageDataBz)
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messageDataSign := requests.SigningProposalStartRequest{
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ParticipantId: len(nodes) - 1,
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SrcPayload: []byte("message to sign"),
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CreatedAt: time.Now(),
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}
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messageDataSignBz, err := json.Marshal(messageDataSign)
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if err != nil {
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log.Fatalf("failed to marshal SigningProposalStartRequest: %v\n", err)
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}
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messageDataBz, err = json.Marshal(map[string][]byte{"data": messageDataSignBz,
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"dkgID": dkgRoundID[:]})
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if err != nil {
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log.Fatalf("failed to marshal SignatureProposalParticipantsListRequest: %v\n", err)
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}
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if _, err := http.Post(fmt.Sprintf("http://localhost:%d/proposeSignMessage", startingPort-1),
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"application/json", bytes.NewReader(messageDataBz)); err != nil {
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log.Fatalf("failed to send HTTP request to sign message: %v\n", err)
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}
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var wg = sync.WaitGroup{}
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wg.Add(1)
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wg.Wait()
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}
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