DAML implementation for Covid19 Use Cases -- Copyright (c) 2020 Rethink Ledgers LLC. All rights reserved.
Link to Google Doc for more information about the Covid19 Model using DAML
https://docs.google.com/document/d/1AdekheWp4MGCXcCUA7thlD_u6XDi-yA3HvEB288owJY/edit#
Step1 : Building and installing DAML Postgress
-
install DAML SDK (currently 1.14) For more information :https://docs.daml.com/getting-started/installation.html
-
install Postgress for local persistance layer with daml For more information : Setup a new DB: 'test' Setup a Postgress User: 'Bart' with password: 'password'
note: when you create a new daml file then 'delete database' and recreate it
-
Build locally .dar file
daml build note: if you are rebuilding, then deleted first your .daml and daml2js folders -
UX code generation:
daml codegen js -o daml2js .daml/dist/Covid19-0.0.1.dar -
Change to ui-js directory
Cd ui-js directory -
Install User interface code
yarn install --force --frozen-lockfile
-
DAML Script
We created an onboarding script in /Scriptfile folder calledScriptExample.dam -
Run Script
To initialize the network You can call: daml script --dar .daml/dist/Covid19-0.0.1.dar --script-name ScriptExample:initializeFixed --ledger-host localhost --ledger-port 6865
-
Start DAML Sandbox in a new console window
daml sandbox .daml/dist/Covid19-0.0.1.dar --ledgerid Covid19 --sql-backend-jdbcurl "jdbc:postgresql://localhost/test?user=Bart&password=password" -
Make Static Content sub-directory
mkdir static-content -
Start JSON-API in a new console window
daml json-api --ledger-host localhost --ledger-port 6865 --http-port 7575 --max-inbound-message-size 4194304 --package-reload-interval 5s --application-id HTTP-JSON-API-Gateway --static-content "prefix=static,directory=./static-content" --access-token-file ./token/token --query-store-jdbc-config "driver=org.postgresql.Driver,url=jdbc:postgresql://localhost:5432/test?&ssl=false,user=Bart,password=password,createSchema=false"
This now links to token authorization file which can be found in ./token directory
The token file must include the correct JWT token
"eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJodHRwczovL2RhbWwuY29tL2xlZGdlci1hcGkiOnsibGVkZ2VySWQiOiJDb3ZpZDE5IiwiYXBwbGljYXRpb25JZCI6ImZvb2JhciIsImFjdEFzIjpbIk9wZXJhdG9yIl0sInJlYWRBcyI6WyJPcGVyYXRvciJdfX0.JklciDh0-GzkvrPkSJ_H3sYX39LFU4C3uVWd7qsMPNo"
Note: In order to be able to retrieve filtered contracts through the JSON-API a new Schema must be created. To achieve this, execute the following command before making any transactions in the ledger
daml json-api --ledger-host localhost --ledger-port 6865 --http-port 7575 --max-inbound-message-size 4194304 --package-reload-interval 5s --application-id HTTP-JSON-API-Gateway --static-content "prefix=static,directory=./static-content" --access-token-file ./token/token --query-store-jdbc-config "driver=org.postgresql.Driver,url=jdbc:postgresql://localhost:5432/test?&ssl=false,user=Bart,password=password,createSchema=true"
After the command has completed, then you can start up the JSON-API the regular way:
daml json-api --ledger-host localhost --ledger-port 6865 --http-port 7575 --max-inbound-message-size 4194304 --package-reload-interval 5s --application-id HTTP-JSON-API-Gateway --static-content "prefix=static,directory=./static-content" --access-token-file ./token/token --query-store-jdbc-config "driver=org.postgresql.Driver,url=jdbc:postgresql://localhost:5432/test?&ssl=false,user=Bart,password=password,createSchema=false"
-
Start Frontend and Backend solution in a new console window in ui-js directory
cd ui-js Verify the authentication token in the following file scr/context/UserContext.js "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJodHRwczovL2RhbWwuY29tL2xlZGdlci1hcGkiOnsibGVkZ2VySWQiOiJDb3ZpZDE5IiwiYXBwbGljYXRpb25JZCI6ImZvb2JhciIsImFjdEFzIjpbIk9wZXJhdG9yIl0sInJlYWRBcyI6WyJPcGVyYXRvciJdfX0.JklciDh0-GzkvrPkSJ_H3sYX39LFU4C3uVWd7qsMPNo" yarn run start -
Initiation of a Local Network
The network can be initiate with pushing a JSON file via Postman
1. Download and install Postman 2. Authentication: bearer token : "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJodHRwczovL2RhbWwuY29tL2xlZGdlci1hcGkiOnsibGVkZ2VySWQiOiJDb3ZpZDE5IiwiYXBwbGljYXRpb25JZCI6ImZvb2JhciIsImFjdEFzIjpbIk9wZXJhdG9yIl0sInJlYWRBcyI6WyJPcGVyYXRvciJdfX0.JklciDh0-GzkvrPkSJ_H3sYX39LFU4C3uVWd7qsMPNo" 3. Send Post instruction POST localhost:7575/v1/create Body: { "templateId": "Main:Network", "payload": { "operator": "Operator" } } 4. You can verify the Network via login in as "Operator" and navigating to the Network left NavBar
-
Deploy DAML Dar file to ProjectDable
More instrictions can be found here: https://docs.projectdabl.com/quickstart/#home -
Generate new JWT Token for "Operator
On the Managment Console create Operator as Party Select the JWT token for Operator Note: This token changes daily and therefore the new token needs to be updated daily in the source code -
Update the Token in the UserContext.js file
// ProjectDable Token for Operator token = <JWT Token Here> -
Build and zip up the UI code in ui-js directory
yarn build zip -r ../covid19xxx-ui.zip build -
Upload and deploy the covid19xxx-ui.zip file to projectdable and the ledger
-
Launch the browser based on the projectdable ledger link
example: https://<ledger-id>.projectdabl.com/#/login -
Setup the initial Contract as Live Data
Goto https://<ledger-id>.projectdabl.com/#/livedata Select Operator and a new Contract Select Newtork COntract with Operator = Operator Note : this creates the starting contract for the Network -
Login into
https://<ledger-id>.projectdabl.com/#/login enter Operator as "Login" and Enter Navigate to the Network screen and you should see a first Contract in the list screen
For any intgertaion with Trinsic you have 2 options: a locl Node.js server or a hosted AWS Node.js server on EC2
-
Local Node.js Server the following local Node.js server files must be available
ui-js/server.js ui-js/.env Note: This file will be provided seperatly ui-js/scr/AxiosClient.js baseURL: 'http://localhost:3002/'
-
Validate that the Node.js server is stared locally
in package.json the following entries must be available in "script" "start": "run-p server frontend", "server": "node server.js --exec nodemon",also can validate using ngrok.io where can be found upon startup of the node.js server
-
AWS Server Note : local EC2 instance and Loadbalancer must be started
Source Code can be found at https://github.com/bartcant/TrinsicServer
The following configuration must be updated
ui-js/scr/AxiosClient.js
baseURL: 'https://daml-covid19.vcredserver.com/'
https://digital-asset.github.io/daml-cheat-sheet/ https://docs.daml.com/1.1.1/ https://docs.daml.com/1.1.1/json-api/index.html
Set up Pool Id, App client id in ui-js/src/config.js
daml script --dar .daml/dist/Covid19-0.0.1.dar --script-name ScriptExample:initializeFixed --ledger-host localhost --ledger-port 6865
Install Python 3.0 Install Poetry
curl -sSL https://raw.githubusercontent.com/python-poetry/poetry/master/get-poetry.py | python
pip install -r requirements.txt
deployment bot
make setup
run bot
python python_bot/bot.py
React
Typescript
Django
Laravel
Facebook
Microsoft
Google
Alibaba
D3
Tencent