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https://github.com/hyperledger-labs/blockchain-explorer

blockchain

Last synced: 29 days ago
JSON representation

Host: GitHub
URL: https://github.com/hyperledger-labs/blockchain-explorer
Owner: hyperledger-labs
License: apache-2.0
Created: 2016-09-11T18:27:20.000Z (about 8 years ago)
Default Branch: main
Last Pushed: 2024-04-02T12:38:02.000Z (7 months ago)
Last Synced: 2024-04-13T20:16:07.912Z (7 months ago)
Topics: blockchain
Language: JavaScript
Homepage:
Size: 162 MB
Stars: 1,395
Watchers: 98
Forks: 940
Open Issues: 69
Metadata Files:
- Readme: README-CONFIG.md
- Changelog: CHANGELOG.md
- Contributing: CONTRIBUTING.md
- License: LICENSE
- Code of conduct: CODE_OF_CONDUCT.md
- Codeowners: CODEOWNERS
- Security: SECURITY.md

Awesome Lists containing this project

awesome-baas - blockchain-explorer

README

## Configuration

This document will describe about the detail of each configuration:

## Database

* Modify `app/explorerconfig.json` to update PostgreSQL database settings.

```json
"postgreSQL": {
"host": "127.0.0.1",
"port": "5432",
"database": "fabricexplorer",
"username": "hppoc",
"passwd": "password"
}
```

* Another alternative to configure database settings is to use environment variables, example of settings:

```shell
export DATABASE_HOST=127.0.0.1
export DATABASE_PORT=5432
export DATABASE_DATABASE=fabricexplorer
export DATABASE_USERNAME=hppoc
export DATABASE_PASSWD=pass12345
```

## Authorization

* Modify `app/explorerconfig.json` to update Authorization (JWT) settings.

```json
"jwt": {
"secret" : "a secret phrase!!",
"expiresIn": "2 days"
}
```
* `secret`: secret string to sign the payload.
* `expiresIn`: expressed in seconds or a string describing a time span [zeit/ms](https://github.com/zeit/ms).
Eg: `60`, `"2 days"`, `"10h"`, `"7d"`. A numeric value is interpreted as a seconds count. If you use a string be sure you provide the time units (days, hours, etc), otherwise milliseconds unit is used by default (`"120"` is equal to `"120ms"`).

* Modify the connection profile (e.g. `app/platform/fabric/connection-profile/test-network.json`) to configure authorization of login user.

```json
"client": {
"adminCredential": {
"id": "exploreradmin",
"password": "exploreradminpw"
},
"enableAuthentication": true,
```
* `adminCredential.id` is the the admin user to login Explorer. Currently Explorer only supports single user mode (can't add more users. We're working on it)
* `adminCredential.password` is the password for the admin user to login Explorer.
* `enableAuthentication` is a flag to enable authentication using a login page, setting to false will skip authentication.
* Even if disable user authentication, you still need to get `adminCredential.id` specified, because it's used to get access to the wallet.

## Disable Explorer login authentication

* If you want to disable login authentication, set `false` to `enableAuthentication` in the connection profile
```json
"client": {
"enableAuthentication": false
}
```

## User management

### Register user

* Only admin and users who has admin roles can register a new user.
* admin user can register a user who has `admin` or `user` roles
* `user` roles doesn't include a privilege to manipulate user
* If multiple profiles are configured, user information of each profile is completely isolated.
* e.g. Admin of org1-network can't manipulate user of org2-network.
* There are 2 ways to register a new user to Explorer. You can do that via GUI or Web API.

* GUI
![](docs/source/images/UserRegisterGUI.png)

* Web API
First you need to login using admin credential to get a JSON Web token.
```shell
$ curl -s --location --request POST 'localhost:8080/auth/login' \
--header 'Content-Type: application/json' --data-raw '{
"user": "exploreradmin",
"password": "exploreradminpw",
"network": "test-network"
}' | jq .

{
"success": true,
"message": "You have successfully logged in!",
"token": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ1c2VyIjoiZXhwbG9yZXJhZG1pbiIsIm5ldHdvcmsiOiJmaXJzdC1uZXR3b3JrIiwiaWF0IjoxNTk3MTMyMTY0LCJleHAiOjE1OTcxMzkzNjR9.5Z9nyQi93fsKNV9Y7RgAXaXKds70fivZOVAEefHzlx4",
"user": {
"message": "logged in",
"name": "exploreradmin"
}
}
```

Then post a request for registering a new user with the retrieved token and mandatorily required parameters.

```shell
$ curl -s --location --request POST 'localhost:8080/api/register' \
--header 'Content-Type: application/json' \
--header 'Authorization: Bearer eyJheyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ1c2VyIjoiZXhwbG9yZXJhZG1pbiIsIm5ldHdvcmsiOiJmaXJzdC1uZXR3b3JrIiwiaWF0IjoxNTk3MTMyMTY0LCJleHAiOjE1OTcxMzkzNjR9.5Z9nyQi93fsKNV9Y7RgAXaXKds70fivZOVAEefHzlx4' \
--data-raw '{
"user": "newuser",
"password": "newuser",
"roles": "user"
}' | jq .

{
"status": 200
}
```

### List registered user

* Anyone can request this Web API after sing in Explorer dashboard.
* You can list registered user via Web API (GUI for this operation has not been supported yet).

```shell
$ curl -s --location --request GET 'localhost:8080/api/userlist' \
--header 'conten: application/json' \
--header 'Authorization: Bearer eyJheyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ1c2VyIjoiZXhwbG9yZXJhZG1pbiIsIm5ldHdvcmsiOiJmaXJzdC1uZXR3b3JrIiwiaWF0IjoxNTk3MTMyMTY0LCJleHAiOjE1OTcxMzkzNjR9.5Z9nyQi93fsKNV9Y7RgAXaXKds70fivZOVAEefHzlx4' \
| jq .

{
"status": 200,
"message": [
{
"username": "exploreradmin",
"email": null,
"networkName": "test-network",
"firstName": null,
"lastName": null,
"roles": "admin"
},
{
"username": "newuser",
"email": null,
"networkName": "test-network",
"firstName": null,
"lastName": null,
"roles": "user"
}
]
}
```

### Unregister user

* Root admin user can't be unregistered
* It's not allowed to unregister user who's sending this request itself
* You can unregister user via Web API (GUI for this operation has not been supported yet).

```shell
$ curl -s --location --request POST 'localhost:8080/api/unregister' \
--header 'Content-Type: application/json' \
--header 'Authorization: Bearer eyJheyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ1c2VyIjoiZXhwbG9yZXJhZG1pbiIsIm5ldHdvcmsiOiJmaXJzdC1uZXR3b3JrIiwiaWF0IjoxNTk3MTMyMTY0LCJleHAiOjE1OTcxMzkzNjR9.5Z9nyQi93fsKNV9Y7RgAXaXKds70fivZOVAEefHzlx4' \
--data-raw '{
"user": "newuser"
}' | jq .

{
"status": 200,
"message": "Unregistered successfully!"
}
```

## Enable TLS

* If your fabric network enables TLS, then set `true` to `client.tlsEnable` in the connection profile (e.g. `app/platform/fabric/connection-profile/test-network.json`).
And you also need to specify peer URL with `grpcs://`. If your fabrice network disables TLS, use `grpc://` instead.

```json
"client": {
"tlsEnable": true,
```
```json
"peers": {
"peer0.org1.example.com": {
"url": "grpcs://localhost:7051",
```

## Connection profile for Hyperledger Fabric network

* Modify `app/platform/fabric/config.json` to define your fabric network connection profile:

```json
{
"network-configs": {
"test-network": {
"name": "Test Network",
"profile": "./connection-profile/test-network.json"
}
},
"license": "Apache-2.0"
}
```
* `test-network` is the name of your connection profile, and can be changed to any name.
* `name` is a name you want to give to your fabric network, you can change only value of the key "name".
* `profile` is the location of your connection profile, you can change only value of the key "profile"
* Change `fabric-path` to your fabric network disk path in the `test-network.json` file
* Provide the full disk path to the adminPrivateKey config option, it ussually ends with "_sk"\
e.g.
```json
"adminPrivateKey": {
"path": "/opt/dev/fabric-samples/test-network/organizations/peerOrganizations/org1.example.com/users/[email protected]/msp/keystore/aaacd899a6362a5c8cc1e6f86d13bfccc777375365bbda9c710bb7119993d71c_sk"
},
```
or
Provide the pem string instead.
```json
"adminPrivateKey": {
"pem": "-----BEGIN PRIVATE KEY-----\nMIGHAgEAMBMG ... utE5HtrGM\n-----END PRIVATE KEY-----\n"
},
```

## Using Fabric-CA

* You need to specify the following keys in the connection profile for using Fabric CA to retrieve certificate:
* client.caCredential
* id
* passowrd
* client.adminCredential
* affiliation
* organizations.[org name]
* certificateAuthorities

```json
"client": {
"tlsEnable": true,
"caCredential": {
"id": "admin",
"password": "adminpw"
},
"adminCredential": {
"id": "exploreradmin",
"password": "exploreradminpw",
"affiliation": "org1.department1"
},
"enableAuthentication": true,
```
```json
"organizations": {
"org1": {
"mspid": "Org1ExampleCom",
"peers": ["peer0-org1"],
"certificateAuthorities": ["ca0"]
}
},
```

* Refer to the following sample connection files:
* `examples/net1/connection-profile/test-network-ca.json` (for using Docker)
* To use this profile, modify `docker-compose.yaml` as below:
```diff
diff --git a/docker-compose.yaml b/docker-compose.yaml
index 9478ca1..ea6ae74 100644
--- a/docker-compose.yaml
+++ b/docker-compose.yaml
@@ -46,7 +46,7 @@ services:
- LOG_CONSOLE_STDOUT=true
- DISCOVERY_AS_LOCALHOST=false
volumes:
- - ./examples/net1/config.json:/opt/explorer/app/platform/fabric/config.json
+ - ./examples/net1/config-ca.json:/opt/explorer/app/platform/fabric/config.json
- ./examples/net1/connection-profile:/opt/explorer/app/platform/fabric/connection-profile
- /fabric-path/fabric-samples/test-network/organizations:/tmp/crypto
- walletstore:/opt/explorer/wallet
```
* `app/platform/fabric/connection-profile/test-network-ca.json` (for using source tree)
* To use this profile, modify `app/platform/fabric/config.json` as below:
```diff
diff --git a/app/platform/fabric/config.json b/app/platform/fabric/config.json
index f99d37b..9825060 100644
--- a/app/platform/fabric/config.json
+++ b/app/platform/fabric/config.json
@@ -2,7 +2,7 @@
"network-configs": {
"test-network": {
"name": "Test Network",
- "profile": "./connection-profile/test-network.json"
+ "profile": "./connection-profile/test-network-ca.json"
}
},
"license": "Apache-2.0"
```

### Disable using Fabric CA

* You need to specify the following keys:
* organizations.[org name]
* adminPrivateKey
* signedCert
```json
"client": {
"tlsEnable": true,
"adminCredential": {
"id": "exploreradmin",
"password": "exploreradminpw",
},
"enableAuthentication": true,
```
```json
"organizations": {
"org1": {
"mspid": "Org1ExampleCom",
"adminPrivateKey": {
"path": "[path to private key]"
},
"peers": ["peer0-org1"],
"signedCert": {
"path": "[path to cert]"
}
}
},
```

## Using client TLS

* When you set an identity label to `clientTlsIdentity` in the connection profile and store identity, which is correspondent with it, into the wallet (`EXPLORER_ROOTDIR/wallet`), client TLS (mutual TLS) is enabled.
```json
"client": {
"clientTlsIdentity": "clientTlsId"
}
```

## Monitoring multiple organizations

* You can also configure multiple profiles in `app/platform/fabric/config.json` for monitoring multiple organizations in a single Explorer instance. It's quite straightforward. You just need to prepare config.json as below and connection profile for each organization (e.g. `org1-network.json` & `org2-network.json`). Note that you need to initialize your backend database once when applying v1.0.0-rc3 and above first time in your local environment. Because we've changed database schema in backend database since this version.

```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"
}
```

## Enable HTTPS access to Hyperledger Explorer

* Configure Hyperledger Explorer for HTTPS based on this link [CONFIG-HTTPS-HLEXPLORER.md](CONFIG-HTTPS-HLEXPLORER.md)

## Sync process mode

* Modify `app/explorerconfig.json` to update sync properties
* Please restart Explorer if any changes made to explorerconfig.json
* Ensure same configuration in Explorer explorerconfig.json if sync process is running from different locations

### Host (Standalone)

```json
"sync": {
"type": "host",
"platform": "fabric",
"blocksSyncTime": "1"
},
```

### Local (Run with Explorer)

```json
"sync": {
"type": "local",
"platform": "fabric",
"blocksSyncTime": "1"
},
```

* `sync`: sync type. `local`(run with Explorer) or `host`(standalone)
* `platform`: platform name
* `blocksSyncTime`: sync interval in minute

## Logging

* By using the following environmet variables, you can control log level of each component (app, db and console). You can set these `ALL < TRACE < DEBUG < INFO < WARN < ERROR < FATAL < MARK < OFF` string to each level. Each file is rolled by both date (7days) and size (8MB).

* LOG_LEVEL_APP
* Log level regarding application layer. The logs are written to `logs/app/app.log`.
* default `DEBUG`
* LOG_LEVEL_DB
* Log level regarding backend layer. The logs are written to `logs/db/db.log`.
* default `DEBUG`
* LOG_LEVEL_CONSOLE
* Log level regarding console. The logs are written to `logs/console/console.log`.
* default `INFO`
* LOG_CONSOLE_STDOUT
* You can switch the destination of console log from file to standard output.
* default `false`

## Run Hyperledger Explorer Using Docker Compose

* Modify an example of `docker-compose.yaml` to align with your environment
* networks > mynetwork.com > external > name
```yaml
networks:
mynetwork.com:
external:
name: net_byfn
```
* services > explorer.mynetwork.com > volumes
* Connection config file path (ex. ./examples/net1/config.json)
* Connection profile directory path (ex. ./examples/net1/connection-profile, which is referred from config.json)
* Directory path for crypto artifacts of fabric network (ex. ./examples/net1/crypto)
```yaml
volumes:
- ./examples/net1/config.json:/opt/explorer/app/platform/fabric/config.json
- ./examples/net1/connection-profile:/opt/explorer/app/platform/fabric/connection-profile
- ./examples/net1/crypto:/tmp/crypto
```
* When you connect the explorer to your fabric network through bridge network, you need to set `DISCOVERY_AS_LOCALHOST` to `false` for disabling hostname mapping into `localhost`.
```yaml
explorer.mynetwork.com:
...
environment:
...
- DISCOVERY_AS_LOCALHOST=false
```
* In this docker-compose.yaml, two named volumes are allocated for persistent data (for Postgres data and user wallet), if you would like to clear these named volumes, run the following:
```shell
docker-compose down -v
```

## Value encoding in Transaction Details

* By default, the value of each read/write set is encoded by UTF-8. If you want to change the type of encoding, you can configure with the following property in the connection profile. Please refer to [Buffer | Node.js v14.7.0 Documentation](https://nodejs.org/docs/latest/api/buffer.html#buffer_buffers_and_character_encodings) for the supported encoding.

```json
"client": {
"rwSetEncoding": "hex"
}
```

## Add a subdomain by adding proxy server

* By putting a proxy server (NGINX server), you can change domain that users access. (e.g. change from `http://my.example.com` to `http://my.example.com/explorer`.
* First, prepare configuration file `nginx_subdomain.conf` on root directory of explorer project for NGINX server as follow.
```
server {

location /explorer/ {
proxy_pass http://explorer.mynetwork.com:8080/;
}

location / {
proxy_pass http://explorer.mynetwork.com:8080/;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "Upgrade";
proxy_set_header Host $host;
}
}
```
* Add a service of proxy server to `docker-compose.yaml`
```diff
diff --git a/docker-compose.yaml b/docker-compose.yaml
index 9478ca1..a0c9d03 100644
--- a/docker-compose.yaml
+++ b/docker-compose.yaml
@@ -57,3 +57,14 @@ services:
condition: service_healthy
networks:
- mynetwork.com
+
+ my-custom-nginx-container:
+ image: nginx:latest
+ container_name: my-custom-nginx-container
+ hostname: my-custom-nginx-container
+ volumes:
+ - ./nginx_subdomain.conf:/etc/nginx/conf.d/default.conf
+ ports:
+ - 80:80
+ networks:
+ - mynetwork.com
```
* Start the proxy server with `docker-compose up -d` and access `http://localhost/explorer`.