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Hyperledger Fabric多機及explorer搭建

2021-12-29 08:46:47 區塊鏈

Hyperledger Fabric多機及explorer搭建

https://blog.csdn.net/g950904/article/details/121143167

參考上方這篇博客,成功搭建多機網路并使用fabric自帶瀏覽器,其中遇到一些小問題,根據自己遇到的問題對搭建程序進行了修改并記錄下來,具體程序如下:

基于fabric2.x搭建

原則上是3臺虛擬機搭建的網路,我的搭建程序是orderer和org1放在192.168.159.152 , org2放在192.168.159.153

192.168.159.152 orderer.example.com
192.168.159.152 peer0.org1.example.com
192.168.159.153 peer0.org2.example.com

1.配置ssh 使用scp命令來跨主機傳輸檔案(可選)

2.生成fabric 證書

創建專案目錄

在三臺虛擬機上使用以下命令創建相同的專案目錄(三臺虛擬機專案路徑要相同),

cd ../hyperledger
mkdir multinodes

撰寫證書檔案

cd ../hyperledger/multinodes

? 使用以下命令將模板檔案復制到當前目錄下,

cryptogen showtemplate > crypto-config.yaml

? 改寫:

# ---------------------------------------------------------------------------
# "OrdererOrgs" - Definition of organizations managing orderer nodes
# ---------------------------------------------------------------------------
OrdererOrgs: 
  # ---------------------------------------------------------------------------
  # Orderer
  # ---------------------------------------------------------------------------
  - Name: Orderer  ##  定義Orderer組織結構
    Domain: example.com  ##  組織的命名域
    EnableNodeOUs: true  
    # 如果設定了EnableNodeOUs,就在msp下生成config.yaml檔案
    # ---------------------------------------------------------------------------
    # "Specs" - See PeerOrgs below for complete description
    # ---------------------------------------------------------------------------
    Specs:
      - Hostname: orderer

# ---------------------------------------------------------------------------
# "PeerOrgs" - Definition of organizations managing peer nodes
# ---------------------------------------------------------------------------
PeerOrgs:
  # ---------------------------------------------------------------------------
  # Org1
  # ---------------------------------------------------------------------------
  - Name: Org1
    Domain: org1.example.com
    EnableNodeOUs: true
    

    # ---------------------------------------------------------------------------
    # "CA"
    # ---------------------------------------------------------------------------
    # Uncomment this section to enable the explicit definition of the CA for this
    # organization.  This entry is a Spec.  See "Specs" section below for details.
    # ---------------------------------------------------------------------------
    # CA:
    #    Hostname: ca # implicitly ca.org1.example.com
    #    Country: US
    #    Province: California
    #    Locality: San Francisco
    #    OrganizationalUnit: Hyperledger Fabric
    #    StreetAddress: address for org # default nil
    #    PostalCode: postalCode for org # default nil

    # ---------------------------------------------------------------------------
    # "Specs"
    # ---------------------------------------------------------------------------
    # Uncomment this section to enable the explicit definition of hosts in your
    # configuration.  Most users will want to use Template, below
    #
    # Specs is an array of Spec entries.  Each Spec entry consists of two fields:
    #   - Hostname:   (Required) The desired hostname, sans the domain.
    #   - CommonName: (Optional) Specifies the template or explicit override for
    #                 the CN.  By default, this is the template:
    #
    #                              "{{.Hostname}}.{{.Domain}}"
    #
    #                 which obtains its values from the Spec.Hostname and
    #                 Org.Domain, respectively.
    #   - SANS:       (Optional) Specifies one or more Subject Alternative Names
    #                 to be set in the resulting x509. Accepts template
    #                 variables {{.Hostname}}, {{.Domain}}, {{.CommonName}}. IP
    #                 addresses provided here will be properly recognized. Other
    #                 values will be taken as DNS names.
    #                 NOTE: Two implicit entries are created for you:
    #                     - {{ .CommonName }}
    #                     - {{ .Hostname }}
    # ---------------------------------------------------------------------------
    # Specs:
    #   - Hostname: foo # implicitly "foo.org1.example.com"
    #     CommonName: foo27.org5.example.com # overrides Hostname-based FQDN set above
    #     SANS:
    #       - "bar.{{.Domain}}"
    #       - "altfoo.{{.Domain}}"
    #       - "{{.Hostname}}.org6.net"
    #       - 172.16.10.31
    #   - Hostname: bar
    #   - Hostname: baz

    # ---------------------------------------------------------------------------
    # "Template"
    # ---------------------------------------------------------------------------
    # Allows for the definition of 1 or more hosts that are created sequentially
    # from a template. By default, this looks like "peer%d" from 0 to Count-1.
    # You may override the number of nodes (Count), the starting index (Start)
    # or the template used to construct the name (Hostname).
    #
    # Note: Template and Specs are not mutually exclusive.  You may define both
    # sections and the aggregate nodes will be created for you.  Take care with
    # name collisions
    # ---------------------------------------------------------------------------
    Template: ##允許定義從模板順序創建的1個或多個主機, 默認情況下,這看起來像是從0到Count-1的“peer”, 您可以覆寫節點數(Count),起始索引(Start)或用于構造名稱的模板(Hostname),
      Count: 1  ##  表示生成幾個Peer
      # Start: 5
      # Hostname: {{.Prefix}}{{.Index}} # default
      # SANS:
      #   - "{{.Hostname}}.alt.{{.Domain}}"

    # ---------------------------------------------------------------------------
    # "Users"
    # ---------------------------------------------------------------------------
    # Count: The number of user accounts _in addition_ to Admin
    # ---------------------------------------------------------------------------
    Users:
      Count: 1  ##  表示生成幾個 普通User

  # ---------------------------------------------------------------------------
  # Org2: See "Org1" for full specification
  # ---------------------------------------------------------------------------
  - Name: Org2
    Domain: org2.example.com
    EnableNodeOUs: true
    Template:
      Count: 1
    Users:
      Count: 1

生成證書檔案

cryptogen generate --config=crypto-config.yaml

使用scp命令將證書檔案復制到其他兩臺虛擬機中(使用scp命令時會要求輸入主機密碼),我只要復制我org2那臺就好了,

scp -r ./crypto-config root@192.168.159.153:/home/zyp/go/src/github.com/hyperledger/multinodes

復制后使用ls命令在其他兩臺虛擬機的multinodes目錄下查看是否復制成功,

3.生成通道檔案

創世塊檔案的撰寫

? 在orderer節點的虛擬機

cd ../hyperledger/multinodes

? 新建configtx.yaml,可以參考官方示例專案test-network中的configtx.yaml組態檔

# Copyright IBM Corp. All Rights Reserved.
#
# SPDX-License-Identifier: Apache-2.0
#

---
################################################################################
#
#   Section: Organizations
#
#   - This section defines the different organizational identities which will
#   be referenced later in the configuration.
#
################################################################################
Organizations:

    # SampleOrg defines an MSP using the sampleconfig.  It should never be used
    # in production but may be used as a template for other definitions
    - &OrdererOrg
        # DefaultOrg defines the organization which is used in the sampleconfig
        # of the fabric.git development environment
        Name: OrdererOrg

        # ID to load the MSP definition as
        ID: OrdererMSP

        # MSPDir is the filesystem path which contains the MSP configuration
        MSPDir: ./crypto-config/ordererOrganizations/example.com/msp

        # Policies defines the set of policies at this level of the config tree
        # For organization policies, their canonical path is usually
        #   /Channel/<Application|Orderer>/<OrgName>/<PolicyName>
        Policies:
            Readers:
                Type: Signature
                Rule: "OR('OrdererMSP.member')"
            Writers:
                Type: Signature
                Rule: "OR('OrdererMSP.member')"
            Admins:
                Type: Signature
                Rule: "OR('OrdererMSP.admin')"
        OrdererEndpoints:
            - orderer.example.com:7050

    - &Org1
        # DefaultOrg defines the organization which is used in the sampleconfig
        # of the fabric.git development environment
        Name: Org1MSP

        # ID to load the MSP definition as
        ID: Org1MSP

        MSPDir: ./crypto-config/peerOrganizations/org1.example.com/msp

        # Policies defines the set of policies at this level of the config tree
        # For organization policies, their canonical path is usually
        #   /Channel/<Application|Orderer>/<OrgName>/<PolicyName>
        Policies:
            Readers:
                Type: Signature
                Rule: "OR('Org1MSP.admin', 'Org1MSP.peer', 'Org1MSP.client')"
            Writers:
                Type: Signature
                Rule: "OR('Org1MSP.admin', 'Org1MSP.client')"
            Admins:
                Type: Signature
                Rule: "OR('Org1MSP.admin')"
            Endorsement:
                Type: Signature
                Rule: "OR('Org1MSP.peer')"
        AnchorPeers:
            - Host: peer0.org1.example.com
              Port: 7051

    - &Org2
        # DefaultOrg defines the organization which is used in the sampleconfig
        # of the fabric.git development environment
        Name: Org2MSP

        # ID to load the MSP definition as
        ID: Org2MSP

        MSPDir: ./crypto-config/peerOrganizations/org2.example.com/msp

        # Policies defines the set of policies at this level of the config tree
        # For organization policies, their canonical path is usually
        #   /Channel/<Application|Orderer>/<OrgName>/<PolicyName>
        Policies:
            Readers:
                Type: Signature
                Rule: "OR('Org2MSP.admin', 'Org2MSP.peer', 'Org2MSP.client')"
            Writers:
                Type: Signature
                Rule: "OR('Org2MSP.admin', 'Org2MSP.client')"
            Admins:
                Type: Signature
                Rule: "OR('Org2MSP.admin')"
            Endorsement:
                Type: Signature
                Rule: "OR('Org2MSP.peer')"
        AnchorPeers:
            - Host: peer0.org2.example.com
              Port: 9051

################################################################################
#
#   SECTION: Capabilities
#
#   - This section defines the capabilities of fabric network. This is a new
#   concept as of v1.1.0 and should not be utilized in mixed networks with
#   v1.0.x peers and orderers.  Capabilities define features which must be
#   present in a fabric binary for that binary to safely participate in the
#   fabric network.  For instance, if a new MSP type is added, newer binaries
#   might recognize and validate the signatures from this type, while older
#   binaries without this support would be unable to validate those
#   transactions.  This could lead to different versions of the fabric binaries
#   having different world states.  Instead, defining a capability for a channel
#   informs those binaries without this capability that they must cease
#   processing transactions until they have been upgraded.  For v1.0.x if any
#   capabilities are defined (including a map with all capabilities turned off)
#   then the v1.0.x peer will deliberately crash.
#
################################################################################
Capabilities:
    # Channel capabilities apply to both the orderers and the peers and must be
    # supported by both.
    # Set the value of the capability to true to require it.
    Channel: &ChannelCapabilities
        # V2_0 capability ensures that orderers and peers behave according
        # to v2.0 channel capabilities. Orderers and peers from
        # prior releases would behave in an incompatible way, and are therefore
        # not able to participate in channels at v2.0 capability.
        # Prior to enabling V2.0 channel capabilities, ensure that all
        # orderers and peers on a channel are at v2.0.0 or later.
        V2_0: true

    # Orderer capabilities apply only to the orderers, and may be safely
    # used with prior release peers.
    # Set the value of the capability to true to require it.
    Orderer: &OrdererCapabilities
        # V2_0 orderer capability ensures that orderers behave according
        # to v2.0 orderer capabilities. Orderers from
        # prior releases would behave in an incompatible way, and are therefore
        # not able to participate in channels at v2.0 orderer capability.
        # Prior to enabling V2.0 orderer capabilities, ensure that all
        # orderers on channel are at v2.0.0 or later.
        V2_0: true

    # Application capabilities apply only to the peer network, and may be safely
    # used with prior release orderers.
    # Set the value of the capability to true to require it.
    Application: &ApplicationCapabilities
        # V2_0 application capability ensures that peers behave according
        # to v2.0 application capabilities. Peers from
        # prior releases would behave in an incompatible way, and are therefore
        # not able to participate in channels at v2.0 application capability.
        # Prior to enabling V2.0 application capabilities, ensure that all
        # peers on channel are at v2.0.0 or later.
        V2_0: true

################################################################################
#
#   SECTION: Application
#
#   - This section defines the values to encode into a config transaction or
#   genesis block for application related parameters
#
################################################################################
Application: &ApplicationDefaults

    # Organizations is the list of orgs which are defined as participants on
    # the application side of the network
    Organizations:

    # Policies defines the set of policies at this level of the config tree
    # For Application policies, their canonical path is
    #   /Channel/Application/<PolicyName>
    Policies:
        Readers:
            Type: ImplicitMeta
            Rule: "ANY Readers"
        Writers:
            Type: ImplicitMeta
            Rule: "ANY Writers"
        Admins:
            Type: ImplicitMeta
            Rule: "MAJORITY Admins"
        LifecycleEndorsement:
            Type: ImplicitMeta
            Rule: "MAJORITY Endorsement"
        Endorsement:
            Type: ImplicitMeta
            Rule: "MAJORITY Endorsement"

    Capabilities:
        <<: *ApplicationCapabilities
################################################################################
#
#   SECTION: Orderer
#
#   - This section defines the values to encode into a config transaction or
#   genesis block for orderer related parameters
#
################################################################################
Orderer: &OrdererDefaults

    # Orderer Type: The orderer implementation to start
    OrdererType: etcdraft
    # Addresses used to be the list of orderer addresses that clients and peers
    # could connect to.  However, this does not allow clients to associate orderer
    # addresses and orderer organizations which can be useful for things such
    # as TLS validation.  The preferred way to specify orderer addresses is now
    # to include the OrdererEndpoints item in your org definition
    Addresses:
        - orderer.example.com:7050

    EtcdRaft:
        Consenters:
        - Host: orderer.example.com
          Port: 7050
          ClientTLSCert: ./crypto-config/ordererOrganizations/example.com/orderers/orderer.example.com/tls/server.crt
          ServerTLSCert: ./crypto-config/ordererOrganizations/example.com/orderers/orderer.example.com/tls/server.crt

    # Batch Timeout: The amount of time to wait before creating a batch
    BatchTimeout: 2s

    # Batch Size: Controls the number of messages batched into a block
    BatchSize:

        # Max Message Count: The maximum number of messages to permit in a batch
        MaxMessageCount: 10

        # Absolute Max Bytes: The absolute maximum number of bytes allowed for
        # the serialized messages in a batch.
        AbsoluteMaxBytes: 99 MB

        # Preferred Max Bytes: The preferred maximum number of bytes allowed for
        # the serialized messages in a batch. A message larger than the preferred
        # max bytes will result in a batch larger than preferred max bytes.
        PreferredMaxBytes: 512 KB

    # Organizations is the list of orgs which are defined as participants on
    # the orderer side of the network
    Organizations:

    # Policies defines the set of policies at this level of the config tree
    # For Orderer policies, their canonical path is
    #   /Channel/Orderer/<PolicyName>
    Policies:
        Readers:
            Type: ImplicitMeta
            Rule: "ANY Readers"
        Writers:
            Type: ImplicitMeta
            Rule: "ANY Writers"
        Admins:
            Type: ImplicitMeta
            Rule: "MAJORITY Admins"
        # BlockValidation specifies what signatures must be included in the block
        # from the orderer for the peer to validate it.
        BlockValidation:
            Type: ImplicitMeta
            Rule: "ANY Writers"

################################################################################
#
#   CHANNEL
#
#   This section defines the values to encode into a config transaction or
#   genesis block for channel related parameters.
#
################################################################################
Channel: &ChannelDefaults
    # Policies defines the set of policies at this level of the config tree
    # For Channel policies, their canonical path is
    #   /Channel/<PolicyName>
    Policies:
        # Who may invoke the 'Deliver' API
        Readers:
            Type: ImplicitMeta
            Rule: "ANY Readers"
        # Who may invoke the 'Broadcast' API
        Writers:
            Type: ImplicitMeta
            Rule: "ANY Writers"
        # By default, who may modify elements at this config level
        Admins:
            Type: ImplicitMeta
            Rule: "MAJORITY Admins"

    # Capabilities describes the channel level capabilities, see the
    # dedicated Capabilities section elsewhere in this file for a full
    # description
    Capabilities:
        <<: *ChannelCapabilities

################################################################################
#
#   Profile
#
#   - Different configuration profiles may be encoded here to be specified
#   as parameters to the configtxgen tool
#
################################################################################
Profiles:

    TwoOrgsOrdererGenesis:
        <<: *ChannelDefaults
        Orderer:
            <<: *OrdererDefaults
            Organizations:
                - *OrdererOrg
            Capabilities:
                <<: *OrdererCapabilities
        Consortiums:
            SampleConsortium:
                Organizations:
                    - *Org1
                    - *Org2
    TwoOrgsChannel:
        Consortium: SampleConsortium
        <<: *ChannelDefaults
        Application:
            <<: *ApplicationDefaults
            Organizations:
                - *Org1
                - *Org2
            Capabilities:
                <<: *ApplicationCapabilities

生成創世塊檔案和通道檔案

configtxgen -profile TwoOrgsOrdererGenesis -channelID fabric-channel -outputBlock ./channel-artifacts/genesis.block

configtxgen -profile TwoOrgsChannel -outputCreateChannelTx ./channel-artifacts/channel.tx -channelID mychannel

configtxgen -profile TwoOrgsChannel -outputAnchorPeersUpdate ./channel-artifacts/Org1MSPanchors.tx -channelID mychannel -asOrg Org1MSP

configtxgen -profile TwoOrgsChannel -outputAnchorPeersUpdate ./channel-artifacts/Org2MSPanchors.tx -channelID mychannel -asOrg Org2MSP

使用以下命令將生成的檔案拷貝到另兩臺主機(程序中會需要輸入宿主機的密碼),

scp -r ./channel-artifacts root@192.168.159.153:/home/zyp/go/src/github.com/hyperledger/multinodes/

復制后使用ls命令在其他兩臺虛擬機的multinodes目錄下查看是否復制成功,(只要復制channel-artifacts就可以)

4.docker-compose檔案撰寫

給3個節點都撰寫 oderer org1 放在152的multinodes下 ; org2放在153

orderer.yaml

version: '2'

services:
  orderer.example.com:
    container_name: orderer.example.com
    image: hyperledger/fabric-orderer:latest
    environment:
      - FABRIC_LOGGING_SPEC=INFO
      - ORDERER_GENERAL_LISTENADDRESS=0.0.0.0
      - ORDERER_GENERAL_LISTENPORT=7050
      - ORDERER_GENERAL_GENESISMETHOD=file
      - ORDERER_GENERAL_GENESISFILE=/var/hyperledger/orderer/orderer.genesis.block
      - ORDERER_GENERAL_LOCALMSPID=OrdererMSP
      - ORDERER_GENERAL_LOCALMSPDIR=/var/hyperledger/orderer/msp
      - ORDERER_GENERAL_TLS_ENABLED=true
      - ORDERER_GENERAL_TLS_PRIVATEKEY=/var/hyperledger/orderer/tls/server.key
      - ORDERER_GENERAL_TLS_CERTIFICATE=/var/hyperledger/orderer/tls/server.crt
      - ORDERER_GENERAL_TLS_ROOTCAS=[/var/hyperledger/orderer/tls/ca.crt]
      - ORDERER_KAFKA_TOPIC_REPLICATIONFACTOR=1
      - ORDERER_KAFKA_VERBOSE=true
      - ORDERER_GENERAL_CLUSTER_CLIENTCERTIFICATE=/var/hyperledger/orderer/tls/server.crt
      - ORDERER_GENERAL_CLUSTER_CLIENTPRIVATEKEY=/var/hyperledger/orderer/tls/server.key
      - ORDERER_GENERAL_CLUSTER_ROOTCAS=[/var/hyperledger/orderer/tls/ca.crt]
    working_dir: /opt/gopath/src/github.com/hyperledger/fabric
    command: orderer
    volumes:
      - ./channel-artifacts/genesis.block:/var/hyperledger/orderer/orderer.genesis.block
      - ./crypto-config/ordererOrganizations/example.com/orderers/orderer.example.com/msp:/var/hyperledger/orderer/msp
      - ./crypto-config/ordererOrganizations/example.com/orderers/orderer.example.com/tls/:/var/hyperledger/orderer/tls
    ports:
      - 7050:7050
    extra_hosts:
      - "orderer.example.com:192.168.159.152"
      - "peer0.org1.example.com:192.168.159.152"
      - "peer0.org2.example.com:192.168.159.153"

org1.yaml

version: '2'

services:
  
  couchdb0.org1.example.com:
    container_name: couchdb0.org1.example.com
    image: couchdb:3.1
    environment:
      - COUCHDB_USER=admin
      - COUCHDB_PASSWORD=adminpw
    ports:
      - 5984:5984

  peer0.org1.example.com:
    container_name: peer0.org1.example.com
    image: hyperledger/fabric-peer:latest
    environment:
      - CORE_VM_ENDPOINT=unix:///host/var/run/docker.sock
      - CORE_PEER_ID=peer0.org1.example.com
      - CORE_PEER_ADDRESS=peer0.org1.example.com:7051
      - CORE_PEER_LISTENADDRESS=0.0.0.0:7051
      - CORE_PEER_CHAINCODEADDRESS=peer0.org1.example.com:7052
      - CORE_PEER_CHAINCODELISTENADDRESS=0.0.0.0:7052
      - CORE_PEER_GOSSIP_BOOTSTRAP=peer0.org1.example.com:7051
      - CORE_PEER_GOSSIP_EXTERNALENDPOINT=peer0.org1.example.com:7051
      - CORE_PEER_LOCALMSPID=Org1MSP
      - FABRIC_LOGGING_SPEC=INFO
      - CORE_PEER_TLS_ENABLED=true
      - CORE_PEER_GOSSIP_USELEADERELECTION=true
      - CORE_PEER_GOSSIP_ORGLEADER=false
      - CORE_PEER_PROFILE_ENABLED=true
      - CORE_PEER_TLS_CERT_FILE=/etc/hyperledger/fabric/tls/server.crt
      - CORE_PEER_TLS_KEY_FILE=/etc/hyperledger/fabric/tls/server.key
      - CORE_PEER_TLS_ROOTCERT_FILE=/etc/hyperledger/fabric/tls/ca.crt
      - CORE_CHAINCODE_EXECUTETIMEOUT=300s
      - CORE_LEDGER_STATE_STATEDATABASE=CouchDB
      - CORE_LEDGER_STATE_COUCHDBCONFIG_COUCHDBADDRESS=couchdb0.org1.example.com:5984
      - CORE_LEDGER_STATE_COUCHDBCONFIG_USERNAME=admin
      - CORE_LEDGER_STATE_COUCHDBCONFIG_PASSWORD=adminpw
    depends_on:
      - couchdb0.org1.example.com

    working_dir: /opt/gopath/src/github.com/hyperledger/fabric/peer
    command: peer node start
    volumes:
      - /var/run/:/host/var/run/
      - ./crypto-config/peerOrganizations/org1.example.com/peers/peer0.org1.example.com/msp:/etc/hyperledger/fabric/msp
      - ./crypto-config/peerOrganizations/org1.example.com/peers/peer0.org1.example.com/tls:/etc/hyperledger/fabric/tls
    ports:
      - 7051:7051
      - 7052:7052
      - 7053:7053
    extra_hosts:
      - "orderer.example.com:192.168.159.152"
      - "peer0.org1.example.com:192.168.159.152"
      - "peer0.org2.example.com:192.168.159.153"
  cli:
    container_name: cli
    image: hyperledger/fabric-tools:latest
    tty: true
    stdin_open: true
    environment:
      - GOPATH=/opt/gopath
      - CORE_VM_ENDPOINT=unix:///host/var/run/docker.sock
      - FABRIC_LOGGING_SPEC=INFO
      - CORE_PEER_ID=cli
      - CORE_PEER_ADDRESS=peer0.org1.example.com:7051
      - CORE_PEER_LOCALMSPID=Org1MSP
      - CORE_PEER_TLS_ENABLED=true
      - CORE_PEER_TLS_CERT_FILE=/opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/peerOrganizations/org1.example.com/peers/peer0.org1.example.com/tls/server.crt
      - CORE_PEER_TLS_KEY_FILE=/opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/peerOrganizations/org1.example.com/peers/peer0.org1.example.com/tls/server.key
      - CORE_PEER_TLS_ROOTCERT_FILE=/opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/peerOrganizations/org1.example.com/peers/peer0.org1.example.com/tls/ca.crt
      - CORE_PEER_MSPCONFIGPATH=/opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/peerOrganizations/org1.example.com/users/Admin@org1.example.com/msp
    working_dir: /opt/gopath/src/github.com/hyperledger/fabric/peer
    command: /bin/bash
    volumes:
      - /var/run/:/host/var/run/
      - ./chaincode/go/:/opt/gopath/src/github.com/hyperledger/fabric-cluster/chaincode/go
      - ./crypto-config:/opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/
      - ./channel-artifacts:/opt/gopath/src/github.com/hyperledger/fabric/peer/channel-artifacts
    extra_hosts:
      - "orderer.example.com:192.168.159.152"
      - "peer0.org1.example.com:192.168.159.152"
      - "peer0.org2.example.com:192.168.159.153"

org2.yaml

version: '2'

services:
  couchdb0.org2.example.com:
    container_name: couchdb0.org2.example.com
    image: couchdb:3.1
    environment:
      - COUCHDB_USER=admin
      - COUCHDB_PASSWORD=adminpw
    ports:
      - 5984:5984

  peer0.org2.example.com:
    container_name: peer0.org2.example.com
    image: hyperledger/fabric-peer:latest
    environment:
      - CORE_VM_ENDPOINT=unix:///host/var/run/docker.sock
      - CORE_PEER_ID=peer0.org2.example.com
      - CORE_PEER_ADDRESS=peer0.org2.example.com:7051
      - CORE_PEER_LISTENADDRESS=0.0.0.0:7051
      - CORE_PEER_CHAINCODEADDRESS=peer0.org2.example.com:7052
      - CORE_PEER_CHAINCODELISTENADDRESS=0.0.0.0:7052
      - CORE_PEER_GOSSIP_BOOTSTRAP=peer0.org2.example.com:7051
      - CORE_PEER_GOSSIP_EXTERNALENDPOINT=peer0.org2.example.com:7051
      - CORE_PEER_LOCALMSPID=Org2MSP
      - FABRIC_LOGGING_SPEC=INFO
      - CORE_PEER_TLS_ENABLED=true
      - CORE_PEER_GOSSIP_USELEADERELECTION=true
      - CORE_PEER_GOSSIP_ORGLEADER=false
      - CORE_PEER_PROFILE_ENABLED=true
      - CORE_PEER_TLS_CERT_FILE=/etc/hyperledger/fabric/tls/server.crt
      - CORE_PEER_TLS_KEY_FILE=/etc/hyperledger/fabric/tls/server.key
      - CORE_PEER_TLS_ROOTCERT_FILE=/etc/hyperledger/fabric/tls/ca.crt
      - CORE_CHAINCODE_EXECUTETIMEOUT=300s
      - CORE_LEDGER_STATE_STATEDATABASE=CouchDB
      - CORE_LEDGER_STATE_COUCHDBCONFIG_COUCHDBADDRESS=couchdb0.org2.example.com:5984
      - CORE_LEDGER_STATE_COUCHDBCONFIG_USERNAME=admin
      - CORE_LEDGER_STATE_COUCHDBCONFIG_PASSWORD=adminpw
    depends_on:
      - couchdb0.org2.example.com

    working_dir: /opt/gopath/src/github.com/hyperledger/fabric/peer
    command: peer node start
    volumes:
      - /var/run/:/host/var/run/
      - ./crypto-config/peerOrganizations/org2.example.com/peers/peer0.org2.example.com/msp:/etc/hyperledger/fabric/msp
      - ./crypto-config/peerOrganizations/org2.example.com/peers/peer0.org2.example.com/tls:/etc/hyperledger/fabric/tls
    ports:
      - 7051:7051
      - 7052:7052
      - 7053:7053
    extra_hosts:
      - "orderer.example.com:192.168.159.152"
      - "peer0.org1.example.com:192.168.159.152"
      - "peer0.org2.example.com:192.168.159.153"
  cli:
    container_name: cli
    image: hyperledger/fabric-tools:latest
    tty: true
    stdin_open: true
    environment:
      - GOPATH=/opt/gopath
      - CORE_VM_ENDPOINT=unix:///host/var/run/docker.sock
      - FABRIC_LOGGING_SPEC=INFO
      - CORE_PEER_ID=cli
      - CORE_PEER_ADDRESS=peer0.org2.example.com:7051
      - CORE_PEER_LOCALMSPID=Org2MSP
      - CORE_PEER_TLS_ENABLED=true
      - CORE_PEER_TLS_CERT_FILE=/opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/peerOrganizations/org2.example.com/peers/peer0.org2.example.com/tls/server.crt
      - CORE_PEER_TLS_KEY_FILE=/opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/peerOrganizations/org2.example.com/peers/peer0.org2.example.com/tls/server.key
      - CORE_PEER_TLS_ROOTCERT_FILE=/opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/peerOrganizations/org2.example.com/peers/peer0.org2.example.com/tls/ca.crt
      - CORE_PEER_MSPCONFIGPATH=/opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/peerOrganizations/org2.example.com/users/Admin@org2.example.com/msp
    working_dir: /opt/gopath/src/github.com/hyperledger/fabric/peer
    command: /bin/bash
    volumes:
      - /var/run/:/host/var/run/
      - ./chaincode/go/:/opt/gopath/src/github.com/hyperledger/fabric-cluster/chaincode/go
      - ./crypto-config:/opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/
      - ./channel-artifacts:/opt/gopath/src/github.com/hyperledger/fabric/peer/channel-artifacts
    extra_hosts:
      - "orderer.example.com:192.168.159.152"
      - "peer0.org1.example.com:192.168.159.152"
      - "peer0.org2.example.com:192.168.159.153"

5.通道操作

首先要啟動服務

docker-compose -f orderer.yaml up -d
docker-compose -f org1.yaml up -d
docker-compose -f org2.yaml up -d

創建通道

在org1主機操作

docker exec -it cli bash
peer channel create -o orderer.example.com:7050 -c mychannel -f ./channel-artifacts/channel.tx --tls true --cafile /opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/ordererOrganizations/example.com/msp/tlscacerts/tlsca.example.com-cert.pem

在這里插入圖片描述

使用ls命令查看生成的檔案(在Org1容器上操作),

使用以下命令將通道檔案 mychannel.block 拷貝到宿主機(從容器cli里拿出來)(在Org1主機上操作),

docker cp cli:/opt/gopath/src/github.com/hyperledger/fabric/peer/mychannel.block ./

然后使用以下命令拷貝到其他服務器上用于其他節點加入通道(在Org1主機上操作),

scp -r mychannel.block root@192.168.159.153:/home/zyp/go/src/github.com/hyperledger/multinodes/

在這里插入圖片描述

使用以下命令將通道檔案拷貝到容器中(在Org2主機上操作),

docker cp mychannel.block cli:/opt/gopath/src/github.com/hyperledger/fabric/peer/

加入通道

使用以下命令讓peer0節點加入通道(在Org1和Org2容器上操作),

docker exec -it cli bash
peer channel join -b mychannel.block

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更新錨節點

org1

peer channel update -o orderer.example.com:7050 -c mychannel -f ./channel-artifacts/Org1MSPanchors.tx --tls --cafile /opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/ordererOrganizations/example.com/orderers/orderer.example.com/msp/tlscacerts/tlsca.example.com-cert.pem

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org2

peer channel update -o orderer.example.com:7050 -c mychannel -f ./channel-artifacts/Org2MSPanchors.tx --tls --cafile /opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/ordererOrganizations/example.com/orderers/orderer.example.com/msp/tlscacerts/tlsca.example.com-cert.pem

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6.安裝呼叫智能合約

將鏈碼放入相應檔案夾

cd …/hyperledger/multinodes/chaincode/go/atcc

使用以下命令進入鏈碼所在目錄

docker exec -it cli bash
cd /opt/gopath/src/github.com/hyperledger/fabric-cluster/chaincode/go/atcc

使用以下命令設定go語言依賴包,

go env -w GOPROXY=https://goproxy.cn,direct
go mod vendor

打包鏈碼

peer lifecycle chaincode package atcc.tar.gz --path github.com/hyperledger/fabric-cluster/chaincode/go/atcc/ --label atcc_1

可以使用ls命令看看atcc下面有沒有生成鏈碼包,生成了再把鏈碼包復制到org2的atcc下即可,

安裝鏈碼

使用以下命令分別在兩個組織的虛擬機上安裝鏈碼(Org1和Org2的虛擬機中都要進行以下操作),

peer lifecycle chaincode install atcc.tar.gz 

使用以下命令分別在兩個組織的虛擬機上安裝鏈碼(Org1和Org2的虛擬機中都要進行以下操作),

peer lifecycle chaincode queryinstalled

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批準鏈碼

使用以下命令批準鏈碼(Org1和Org2的虛擬機中都要進行以下操作,其中鏈碼的ID要根據上面查詢的結果替換到下面的命令中),

peer lifecycle chaincode approveformyorg --channelID mychannel --name atcc --version 1.0 --init-required --package-id atcc_1:f8c5050802c36350169ec1f0d258a9a8acb1c2bd577d1bb10578ced10f9b090e --sequence 1 --tls true --cafile /opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/ordererOrganizations/example.com/orderers/orderer.example.com/msp/tlscacerts/tlsca.example.com-cert.pem

在這里插入圖片描述

使用以下命令查看鏈碼是否就緒(Org1和Org2的虛擬機中都要進行以下操作)

peer lifecycle chaincode checkcommitreadiness --channelID mychannel --name atcc --version 1.0 --init-required --sequence 1 --tls true --cafile /opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/ordererOrganizations/example.com/orderers/orderer.example.com/msp/tlscacerts/tlsca.example.com-cert.pem --output json

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提交鏈碼

org1或org2 提交一次即可

peer lifecycle chaincode commit -o orderer.example.com:7050 --channelID mychannel --name atcc --version 1.0 --sequence 1 --init-required --tls true --cafile /opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/ordererOrganizations/example.com/orderers/orderer.example.com/msp/tlscacerts/tlsca.example.com-cert.pem --peerAddresses peer0.org1.example.com:7051 --tlsRootCertFiles /opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/peerOrganizations/org1.example.com/peers/peer0.org1.example.com/tls/ca.crt --peerAddresses peer0.org2.example.com:7051 --tlsRootCertFiles /opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/peerOrganizations/org2.example.com/peers/peer0.org2.example.com/tls/ca.crt

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初始化鏈碼

peer chaincode invoke -o orderer.example.com:7050 --isInit --ordererTLSHostnameOverride orderer.example.com --tls true --cafile /opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/ordererOrganizations/example.com/orderers/orderer.example.com/msp/tlscacerts/tlsca.example.com-cert.pem -C mychannel -n atcc --peerAddresses peer0.org1.example.com:7051 --tlsRootCertFiles /opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/peerOrganizations/org1.example.com/peers/peer0.org1.example.com/tls/ca.crt --peerAddresses peer0.org2.example.com:7051 --tlsRootCertFiles /opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/peerOrganizations/org2.example.com/peers/peer0.org2.example.com/tls/ca.crt -c '{"function":"initLedger","Args":[]}'

呼叫查詢方法

若搭建成功,初始化在org1完成 那么就可以org2中查詢到結果,

peer chaincode query -C mychannel -n atcc -c '{"Args":["getAllAssets"]}'

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7、搭建超級賬本區塊鏈瀏覽器

下載組態檔

因為不能翻墻,經常會遇到與github連接失敗的情況,可以直接下載包或自己撰寫,

mkdir explorer //創建fabric服務器的根目錄

這里就不下載包了,給出代碼直接創建檔案

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修改組態檔

cd connection-profile/
vim org1-network.json

{
	"name": "org1-network",
	"version": "1.0.0",
	"client": {
		"tlsEnable": true,
		"adminCredential": {
			"id": "exploreradmin",
			"password": "exploreradminpw"
		},
		"enableAuthentication": true,
		"organization": "Org1MSP",
		"connection": {
			"timeout": {
				"peer": {
					"endorser": "300"
				},
				"orderer": "300"
			}
		}
	},
	"channels": {
		"mychannel": {
			"peers": {
				"peer0.org1.example.com": {}
			}
		}
	},
	"organizations": {
		"Org1MSP": {
			"mspid": "Org1MSP",
			"adminPrivateKey": {
				"path": "/tmp/crypto/peerOrganizations/org1.example.com/users/User1@org1.example.com/msp/keystore/priv_sk"
			},
			"peers": ["peer0.org1.example.com"],
			"signedCert": {
				"path": "/tmp/crypto/peerOrganizations/org1.example.com/users/User1@org1.example.com/msp/signcerts/User1@org1.example.com-cert.pem"
			}
		}
	},
	"peers": {
		"peer0.org1.example.com": {
			"tlsCACerts": {
				"path": "/tmp/crypto/peerOrganizations/org1.example.com/peers/peer0.org1.example.com/tls/ca.crt"
			},
			"url": "grpcs://peer0.org1.example.com:7051"
			
		}
	}
}

vim org2-network.json
{
	"name": "org2-network",
	"version": "1.0.0",
	"client": {
		"tlsEnable": true,
		"adminCredential": {
			"id": "exploreradmin",
			"password": "exploreradminpw"
		},
		"enableAuthentication": true,
		"organization": "Org2MSP",
		"connection": {
			"timeout": {
				"peer": {
					"endorser": "300"
				},
				"orderer": "300"
			}
		}
	},
	"channels": {
		"mychannel": {
			"peers": {
				"peer0.org2.example.com": {}
			}
		}
	},
	"organizations": {
		"Org2MSP": {
			"mspid": "Org2MSP",
			"adminPrivateKey": {
				"path": "/tmp/crypto/peerOrganizations/org2.example.com/users/User1@org2.example.com/msp/keystore/priv_sk"
			},
			"peers": ["peer0.org2.example.com"],
			"signedCert": {
				"path": "/tmp/crypto/peerOrganizations/org2.example.com/users/User1@org2.example.com/msp/signcerts/User1@org2.example.com-cert.pem"
			}
		}
	},
	"peers": {
		"peer0.org2.example.com": {
			"tlsCACerts": {
				"path": "/tmp/crypto/peerOrganizations/org2.example.com/peers/peer0.org2.example.com/tls/ca.crt"
			},
			"url": "grpcs://peer0.org2.example.com:7051"
		}
	}
}


cd ..
vim config.json
{
        "network-configs": {
                "org1-network": {
                        "name": "org1-Network",
                        "profile": "./connection-profile/org1-network.json"
                },
                "org2-network": {
                        "name": "org2-Network",
                        "profile": "./connection-profile/org2-network.json"
                }
        },
        "license": "Apache-2.0"
}

修改docker-compose檔案

# SPDX-License-Identifier: Apache-2.0
version: '2.1'

volumes:
  pgdata:
  walletstore:

networks:
  mynetwork.com:
    external:
      name: multinodes_default

services:

  explorerdb.mynetwork.com:
    image: hyperledger/explorer-db:latest
    container_name: explorerdb.mynetwork.com
    hostname: explorerdb.mynetwork.com
    environment:
      - DATABASE_DATABASE=fabricexplorer
      - DATABASE_USERNAME=exploreradmin
      - DATABASE_PASSWORD=exploreradminpw
    healthcheck:
      test: "pg_isready -h localhost -p 5432 -q -U postgres"
      interval: 30s
      timeout: 100s
      retries: 10
    volumes:
      - pgdata:/var/lib/postgresql/data
    networks:
      - mynetwork.com

  explorer.mynetwork.com:
    image: hyperledger/explorer:latest
    container_name: explorer.mynetwork.com
    hostname: explorer.mynetwork.com
    environment:
      - DATABASE_HOST=explorerdb.mynetwork.com
      - DATABASE_DATABASE=fabricexplorer
      - DATABASE_USERNAME=exploreradmin
      - DATABASE_PASSWD=exploreradminpw
      - LOG_LEVEL_APP=debug
      - LOG_LEVEL_DB=debug
      - LOG_LEVEL_CONSOLE=debug
      - LOG_CONSOLE_STDOUT=true
      - DISCOVERY_AS_LOCALHOST=false
    volumes:
      - ./config.json:/opt/explorer/app/platform/fabric/config.json
      - ./connection-profile:/opt/explorer/app/platform/fabric/connection-profile
      - ./organizations:/tmp/crypto
      - walletstore:/opt/explorer/wallet
    ports:
      - 8080:8080
    depends_on:
      explorerdb.mynetwork.com:
        condition: service_healthy
    networks:
      - mynetwork.com

啟動區塊鏈瀏覽器

docker-compose -f docker-compose.yaml up -d

然后docker ps 查看容器是否正在運行(可能 explorer會自動退出,可以docker logs ID 看看具體錯誤)

注意用fabric的網路

注意org2節點埠號

然后localhost:8080即可訪問

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  • JAVA使用 web3j 進行token轉賬

    最近新學習了下區塊鏈這方面的知識,所學不多,給大家分享下。 # 1. 關于web3j web3j是一個高度模塊化,反應性,型別安全的Java和Android庫,用于與智能合約配合并與以太坊網路上的客戶端(節點)集成。 # 2. 準備作業 jdk版本1.8 引入maven <dependency> < ......

    uj5u.com 2020-09-10 03:03:06 more
  • 以太坊智能合約開發框架Truffle

    前言 部署智能合約有多種方式,命令列的瀏覽器的渠道都有,但往往跟我們程式員的風格不太相符,因為我們習慣了在IDE里寫了代碼然后打包運行看效果。 雖然現在IDE中已經存在了Solidity插件,可以撰寫智能合約,但是部署智能合約卻要另走他路,沒辦法進行一個快捷的部署與測驗。 如果團隊管理的區塊節點多、 ......

    uj5u.com 2020-09-10 03:03:12 more
  • 谷歌二次驗證碼成為區塊鏈專用安全碼,你怎么看?

    前言 谷歌身份驗證器,前些年大家都比較陌生,但隨著國內互聯網安全的加強,它越來越多地出現在大家的視野中。 比較廣泛接觸的人群是國際3A游戲愛好者,游戲盜號現象嚴重+國外賬號安全應用廣泛,這類游戲一般都會要求用戶系結名為“兩步驗證”、“雙重驗證”等,平臺一般都推薦用谷歌身份驗證器。 后來區塊鏈業務風靡 ......

    uj5u.com 2020-09-10 03:03:17 more
  • 密碼學DAY1

    目錄 ##1.1 密碼學基本概念 密碼在我們的生活中有著重要的作用,那么密碼究竟來自何方,為何會產生呢? 密碼學是網路安全、資訊安全、區塊鏈等產品的基礎,常見的非對稱加密、對稱加密、散列函式等,都屬于密碼學范疇。 密碼學有數千年的歷史,從最開始的替換法到如今的非對稱加密演算法,經歷了古典密碼學,近代密 ......

    uj5u.com 2020-09-10 03:03:50 more
  • 密碼學DAY1_02

    目錄 ##1.1 ASCII編碼 ASCII(American Standard Code for Information Interchange,美國資訊交換標準代碼)是基于拉丁字母的一套電腦編碼系統,主要用于顯示現代英語和其他西歐語言。它是現今最通用的單位元組編碼系統,并等同于國際標準ISO/IE ......

    uj5u.com 2020-09-10 03:04:50 more
  • 密碼學DAY2

    ##1.1 加密模式 加密模式:https://docs.oracle.com/javase/8/docs/api/javax/crypto/Cipher.html ECB ECB : Electronic codebook, 電子密碼本. 需要加密的訊息按照塊密碼的塊大小被分為數個塊,并對每個塊進 ......

    uj5u.com 2020-09-10 03:05:42 more
  • NTP時鐘服務器的特點(京準電子)

    NTP時鐘服務器的特點(京準電子) NTP時鐘服務器的特點(京準電子) 京準電子官V——ahjzsz 首先對時間同步進行了背景介紹,然后討論了不同的時間同步網路技術,最后指出了建立全球或區域時間同步網存在的問題。 一、概 述 在通信領域,“同步”概念是指頻率的同步,即網路各個節點的時鐘頻率和相位同步 ......

    uj5u.com 2020-09-10 03:05:47 more
  • 標準化考場時鐘同步系統推進智能化校園建設

    標準化考場時鐘同步系統推進智能化校園建設 標準化考場時鐘同步系統推進智能化校園建設 安徽京準電子科技官微——ahjzsz 一、背景概述隨著教育事業的快速發展,學校建設如雨后春筍,隨之而來的學校教育、管理、安全方面的問題成了學校管理人員面臨的最大的挑戰,這些問題同時也是學生家長所擔心的。為了讓學生有更 ......

    uj5u.com 2020-09-10 03:05:51 more
  • 位元幣入門

    引言 位元幣基本結構 位元幣基礎知識 1)哈希演算法 2)非對稱加密技術 3)數字簽名 4)MerkleTree 5)哪有位元幣,有的是UTXO 6)位元幣挖礦與共識 7)區塊驗證(共識) 總結 引言 上一篇我們已經知道了什么是區塊鏈,此篇說一下區塊鏈的第一個應用——位元幣。其實先有位元幣,后有的區塊 ......

    uj5u.com 2020-09-10 03:06:15 more
  • 北斗對時服務器(北斗對時設備)電力系統應用

    北斗對時服務器(北斗對時設備)電力系統應用 北斗對時服務器(北斗對時設備)電力系統應用 京準電子科技官微(ahjzsz) 中國北斗衛星導航系統(英文名稱:BeiDou Navigation Satellite System,簡稱BDS),因為是目前世界范圍內唯一可以大面積提供免費定位服務的系統,所以 ......

    uj5u.com 2020-09-10 03:06:20 more
最新发布
  • web3 產品介紹:metamask 錢包 使用最多的瀏覽器插件錢包

    Metamask錢包是一種基于區塊鏈技術的數字貨幣錢包,它允許用戶在安全、便捷的環境下管理自己的加密資產。Metamask錢包是以太坊生態系統中最流行的錢包之一,它具有易于使用、安全性高和功能強大等優點。 本文將詳細介紹Metamask錢包的功能和使用方法。 一、 Metamask錢包的功能 數字資 ......

    uj5u.com 2023-04-20 08:46:47 more
  • Hyperledger Fabric 使用 CouchDB 和復雜智能合約開發

    在上個實驗中,我們已經實作了簡單智能合約實作及客戶端開發,但該實驗中智能合約只有基礎的增刪改查功能,且其中的資料管理功能與傳統 MySQL 比相差甚遠。本文將在前面實驗的基礎上,將 Hyperledger Fabric 的默認資料庫支持 LevelDB 改為 CouchDB 模式,以實作更復雜的資料... ......

    uj5u.com 2023-04-16 07:28:31 more
  • .NET Core 波場鏈離線簽名、廣播交易(發送 TRX和USDT)筆記

    Get Started NuGet You can run the following command to install the Tron.Wallet.Net in your project. PM> Install-Package Tron.Wallet.Net 配置 public reco ......

    uj5u.com 2023-04-14 08:08:00 more
  • DKP 黑客分析——不正確的代幣對比率計算

    概述: 2023 年 2 月 8 日,針對 DKP 協議的閃電貸攻擊導致該協議的用戶損失了 8 萬美元,因為 execute() 函式取決于 USDT-DKP 對中兩種代幣的余額比率。 智能合約黑客概述: 攻擊者的交易:0x0c850f,0x2d31 攻擊者地址:0xF38 利用合同:0xf34ad ......

    uj5u.com 2023-04-07 07:46:09 more
  • Defi開發簡介

    Defi開發簡介 介紹 Defi是去中心化金融的縮寫, 是一項旨在利用區塊鏈技術和智能合約創建更加開放,可訪問和透明的金融體系的運動. 這與傳統金融形成鮮明對比,傳統金融通常由少數大型銀行和金融機構控制 在Defi的世界里,用戶可以直接從他們的電腦或移動設備上訪問廣泛的金融服務,而不需要像銀行或者信 ......

    uj5u.com 2023-04-05 08:01:34 more
  • solidity簡單的ERC20代幣實作

    // SPDX-License-Identifier: GPL-3.0 pragma solidity >=0.7.0 <0.9.0; import "hardhat/console.sol"; //ERC20 同質化代幣,每個代幣的本質或性質都是相同 //ETH 是原生代幣,它不是ERC20代幣, ......

    uj5u.com 2023-03-21 07:56:29 more
  • solidity 參考型別修飾符memory、calldata與storage 常量修飾符C

    在solidity語言中 參考型別修飾符(參考型別為存盤空間不固定的數值型別) memory、calldata與storage,它們只能修飾參考型別變數,比如字串、陣列、位元組等... memory 適用于方法傳參、返參或在方法體內使用,使用完就會清除掉,釋放記憶體 calldata 僅適用于方法傳參 ......

    uj5u.com 2023-03-08 07:57:54 more
  • solidity注解標簽

    在solidity語言中 注釋符為// 注解符為/* 內容*/ 或者 是 ///內容 注解中含有這幾個標簽給予我們使用 @title 一個應該描述合約/介面的標題 contract, library, interface @author 作者的名字 contract, library, interf ......

    uj5u.com 2023-03-08 07:57:49 more
  • 評價指標:相似度、GAS消耗

    【代碼注釋自動生成方法綜述】 這些評測指標主要來自機器翻譯和文本總結等研究領域,可以評估候選文本(即基于代碼注釋自動方法而生成)和參考文本(即基于手工方式而生成)的相似度. BLEU指標^[^?88^^?^]^:其全稱是bilingual evaluation understudy.該指標是最早用于 ......

    uj5u.com 2023-02-23 07:27:39 more
  • 基于NOSTR協議的“公有制”版本的Twitter,去中心化社交軟體Damus

    最近,一個幽靈,Web3的幽靈,在網路游蕩,它叫Damus,這玩意詮釋了什么叫做病毒式營銷,滑稽的是,一個Web3產品卻在Web2的產品鏈上瘋狂傳銷,各方大佬紛紛為其背書,到底發生了什么?Damus的葫蘆里,賣的是什么藥? 注冊和簡單實用 很少有什么產品在用戶注冊環節會有什么噱頭,但Damus確實出 ......

    uj5u.com 2023-02-05 06:48:39 more