{}

const commonProperties = {
    first: { type: "uint16" },
    second: { type: "uint16" },
    third: { type: "uint16" },
    fourth: { type: "uint16" },
    fifth: { type: "uint16" },
    sixth: { type: "uint16" }
};

const schema = {
    discriminator: "dicriminatorProperty",
    mapping: {
        manual: {
            properties: {
                ...commonProperties,
                additionalOne: { type: "uint16" },
                additionalTwo: { type: "uint16" }
            }
        },
        auto: {
            properties: {
                ...commonProperties,
                additionalThree: { type: "uint16" }
            }
        }
    }
};

const Ajv = require("ajv/dist/jtd");
const ajv = new Ajv();
const validate = ajv.compile(schema);

const data1 = {
    dicriminatorProperty: "manual",
    first: 17,
    second: 17,
    third: 17,
    fourth: 17,
    fifth: 17,
    sixth: 17,
    additionalOne: 17,
    additionalTwo: 17
};

const data2 = {
    dicriminatorProperty: "auto",
    first: 17,
    second: 17,
    third: 17,
    fourth: 17,
    fifth: 17,
    sixth: 17,
    additionalThree: 17
};

// ---------------------------------------------------
// This validation passes
// ---------------------------------------------------
console.log("Valid data1? ", validate(data1));

// ---------------------------------------------------
// This validation fails
// ---------------------------------------------------
console.log("Valid data2? ", validate(data2));