@pythnetwork/price-service-sdk
Version:
Pyth price service SDK
203 lines (202 loc) • 6.47 kB
JavaScript
;
// To parse this data:
//
// import { Convert, PriceFeed } from "./file";
//
// const priceFeed = Convert.toPriceFeed(json);
//
// These functions will throw an error if the JSON doesn't
// match the expected interface, even if the JSON is valid.
Object.defineProperty(exports, "__esModule", { value: true });
exports.Convert = void 0;
// Converts JSON types to/from your types
// and asserts the results at runtime
class Convert {
static toPriceFeed(json) {
return cast(json, r("PriceFeed"));
}
static priceFeedToJson(value) {
return uncast(value, r("PriceFeed"));
}
static toPrice(json) {
return cast(json, r("Price"));
}
static priceToJson(value) {
return uncast(value, r("Price"));
}
static toPriceFeedMetadata(json) {
return cast(json, r("PriceFeedMetadata"));
}
static priceFeedMetadataToJson(value) {
return uncast(value, r("PriceFeedMetadata"));
}
}
exports.Convert = Convert;
function invalidValue(typ, val, key = "") {
if (key) {
throw Error(`Invalid value for key "${key}". Expected type ${JSON.stringify(typ)} but got ${JSON.stringify(val)}`);
}
throw Error(`Invalid value ${JSON.stringify(val)} for type ${JSON.stringify(typ)}`);
}
function jsonToJSProps(typ) {
if (typ.jsonToJS === undefined) {
const map = {};
typ.props.forEach((p) => (map[p.json] = { key: p.js, typ: p.typ }));
typ.jsonToJS = map;
}
return typ.jsonToJS;
}
function jsToJSONProps(typ) {
if (typ.jsToJSON === undefined) {
const map = {};
typ.props.forEach((p) => (map[p.js] = { key: p.json, typ: p.typ }));
typ.jsToJSON = map;
}
return typ.jsToJSON;
}
function transform(val, typ, getProps, key = "") {
function transformPrimitive(typ, val) {
if (typeof typ === typeof val)
return val;
return invalidValue(typ, val, key);
}
function transformUnion(typs, val) {
// val must validate against one typ in typs
const l = typs.length;
for (let i = 0; i < l; i++) {
const typ = typs[i];
try {
return transform(val, typ, getProps);
}
catch (_) { }
}
return invalidValue(typs, val);
}
function transformEnum(cases, val) {
if (cases.indexOf(val) !== -1)
return val;
return invalidValue(cases, val);
}
function transformArray(typ, val) {
// val must be an array with no invalid elements
if (!Array.isArray(val))
return invalidValue("array", val);
return val.map((el) => transform(el, typ, getProps));
}
function transformDate(val) {
if (val === null) {
return null;
}
const d = new Date(val);
if (isNaN(d.valueOf())) {
return invalidValue("Date", val);
}
return d;
}
function transformObject(props, additional, val) {
if (val === null || typeof val !== "object" || Array.isArray(val)) {
return invalidValue("object", val);
}
const result = {};
Object.getOwnPropertyNames(props).forEach((key) => {
const prop = props[key];
const v = Object.prototype.hasOwnProperty.call(val, key)
? val[key]
: undefined;
result[prop.key] = transform(v, prop.typ, getProps, prop.key);
});
Object.getOwnPropertyNames(val).forEach((key) => {
if (!Object.prototype.hasOwnProperty.call(props, key)) {
result[key] = transform(val[key], additional, getProps, key);
}
});
return result;
}
if (typ === "any")
return val;
if (typ === null) {
if (val === null)
return val;
return invalidValue(typ, val);
}
if (typ === false)
return invalidValue(typ, val);
while (typeof typ === "object" && typ.ref !== undefined) {
typ = typeMap[typ.ref];
}
if (Array.isArray(typ))
return transformEnum(typ, val);
if (typeof typ === "object") {
return typ.hasOwnProperty("unionMembers")
? transformUnion(typ.unionMembers, val)
: typ.hasOwnProperty("arrayItems")
? transformArray(typ.arrayItems, val)
: typ.hasOwnProperty("props")
? transformObject(getProps(typ), typ.additional, val)
: invalidValue(typ, val);
}
// Numbers can be parsed by Date but shouldn't be.
if (typ === Date && typeof val !== "number")
return transformDate(val);
return transformPrimitive(typ, val);
}
function cast(val, typ) {
return transform(val, typ, jsonToJSProps);
}
function uncast(val, typ) {
return transform(val, typ, jsToJSONProps);
}
function a(typ) {
return { arrayItems: typ };
}
function u(...typs) {
return { unionMembers: typs };
}
function o(props, additional) {
return { props, additional };
}
function m(additional) {
return { props: [], additional };
}
function r(name) {
return { ref: name };
}
const typeMap = {
PriceFeed: o([
{ json: "ema_price", js: "ema_price", typ: r("Price") },
{ json: "id", js: "id", typ: "" },
{
json: "metadata",
js: "metadata",
typ: u(undefined, r("PriceFeedMetadata")),
},
{ json: "price", js: "price", typ: r("Price") },
{ json: "vaa", js: "vaa", typ: u(undefined, "") },
], "any"),
Price: o([
{ json: "conf", js: "conf", typ: "" },
{ json: "expo", js: "expo", typ: 0 },
{ json: "price", js: "price", typ: "" },
{ json: "publish_time", js: "publish_time", typ: 0 },
], "any"),
PriceFeedMetadata: o([
{
json: "attestation_time",
js: "attestation_time",
typ: u(undefined, 0),
},
{ json: "emitter_chain", js: "emitter_chain", typ: 0 },
{
json: "prev_publish_time",
js: "prev_publish_time",
typ: u(undefined, 0),
},
{
json: "price_service_receive_time",
js: "price_service_receive_time",
typ: u(undefined, 0),
},
{ json: "sequence_number", js: "sequence_number", typ: u(undefined, 0) },
{ json: "slot", js: "slot", typ: u(undefined, 0) },
], "any"),
};