@polkadot/typegen
Version:
Type generation scripts
61 lines (60 loc) • 2.5 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.getMetadataViaWs = getMetadataViaWs;
exports.getRpcMethodsViaWs = getRpcMethodsViaWs;
exports.getRuntimeVersionViaWs = getRuntimeVersionViaWs;
const decorateMethod_1 = require("@polkadot/api/promise/decorateMethod");
const types_1 = require("@polkadot/types");
const util_1 = require("@polkadot/util");
const x_ws_1 = require("@polkadot/x-ws");
async function getWsData(endpoint, method, params) {
return new Promise((resolve, reject) => {
const tracker = (0, decorateMethod_1.promiseTracker)(resolve, reject);
try {
const websocket = new x_ws_1.WebSocket(endpoint);
websocket.onclose = (event) => {
if (event.code !== 1000) {
tracker.reject(new Error(`disconnected, code: '${event.code}' reason: '${event.reason}'`));
}
};
websocket.onerror = (event) => {
tracker.reject(new Error(`WebSocket error:: ${(0, util_1.stringify)(event)}`));
};
websocket.onopen = () => {
console.log('connected');
params
? websocket.send(`{"id":"1","jsonrpc":"2.0","method":"${method}","params":[${params.map((param) => `"${param}"`).join(',')}]}`)
: websocket.send(`{"id":"1","jsonrpc":"2.0","method":"${method}","params":[]}`);
};
websocket.onmessage = (message) => {
try {
tracker.resolve(JSON.parse(message.data).result);
}
catch (error) {
tracker.reject(error);
}
websocket.close();
};
}
catch (error) {
tracker.reject(error);
}
});
}
async function getMetadataViaWs(endpoint, metadataVer) {
const registry = new types_1.TypeRegistry();
if (metadataVer) {
return await getWsData(endpoint, 'state_call', ['Metadata_metadata_at_version', (0, util_1.u8aToHex)(registry.createType('u32', metadataVer).toU8a())]);
}
else {
return await getWsData(endpoint, 'state_getMetadata');
}
}
async function getRpcMethodsViaWs(endpoint) {
const result = await getWsData(endpoint, 'rpc_methods');
return result.methods;
}
async function getRuntimeVersionViaWs(endpoint) {
const result = await getWsData(endpoint, 'state_getRuntimeVersion');
return result.apis;
}