Working with Node.js

Cicero Node.js API

You can work with Accord Project templates directly in JavaScript using Node.js.

Documentation for the API can be found in Cicero API.

Working with Templates

Import the Template class

To import the Cicero class for templates:

const Template = require('@accordproject/cicero-core').Template;

Load a Template

To create a Template instance in memory call the fromDirectory, fromArchive or fromUrl methods:

    const template = await Template.fromDirectory('./test/data/latedeliveryandpenalty');

These methods are asynchronous and return a Promise, so you should use await to wait for the promise to be resolved.

Instantiate a Template

Once a Template has been loaded, you can create a Clause based on the Template. You can either instantiate the Clause using source DSL text (by calling parse), or you can set an instance of the template model as JSON data (by calling setData):

    // load the DSL text for the template
    const testLatePenaltyInput = fs.readFileSync(path.resolve(__dirname, 'data/', 'sample.txt'), 'utf8');

    const clause = new Clause(template);
    clause.parse(testLatePenaltyInput);

    // get the JSON object created from the parse
    const data = clause.getData();

OR - create a contract and set the data from a JSON object.

    const clause = new Clause(template);
    clause.setData( {$class: 'org.acme.MyTemplateModel', 'foo': 42 } );

Executing a Template Instance

Once you have instantiated a clause or contract instance, you can execute it.

Import the Engine class

To execute a Clause you first need to create an instance of the Engine class:

const Engine = require('@accordproject/cicero-engine').Engine;

Send a request to the contract

You can then call execute on it, passing in the clause or contract instance, and the request:

    const request = {
        '$class': 'org.accordproject.latedeliveryandpenalty.LateDeliveryAndPenaltyRequest',
        'forceMajeure': false,
        'agreedDelivery': '2017-10-07T16:38:01.412Z',
        'goodsValue': 200,
        'transactionId': '402c8f50-9e61-433e-a7c1-afe61c06ef00',
        'timestamp': '2017-11-12T17:38:01.412Z'
    };
    const state = {};
    state.$class = 'org.accordproject.cicero.contract.AccordContractState';
    state.stateId = 'org.accordproject.cicero.contract.AccordContractState#1';
    const result = await engine.execute(clause, request, state);