@polkadot/types
Version:
Implementation of the Parity codec
41 lines (40 loc) • 1.43 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.Metadata = void 0;
const util_1 = require("@polkadot/util");
const MetadataVersioned_js_1 = require("./MetadataVersioned.js");
const EMPTY_METADATA = new Uint8Array([0x6d, 0x65, 0x74, 0x61, 9]);
const VERSION_IDX = EMPTY_METADATA.length - 1;
/** @internal */
function decodeU8a(registry, u8a) {
if (u8a.length === 0) {
return EMPTY_METADATA;
}
else if (u8a[VERSION_IDX] === 9) {
// This is an f-ing hack as a follow-up to another ugly hack
// https://github.com/polkadot-js/api/commit/a9211690be6b68ad6c6dad7852f1665cadcfa5b2
// when we fail on V9, try to re-parse it as v10...
try {
return new MetadataVersioned_js_1.MetadataVersioned(registry, u8a);
}
catch {
u8a[VERSION_IDX] = 10;
}
}
return u8a;
}
/**
* @name Metadata
* @description
* The versioned runtime metadata as a decoded structure
*/
class Metadata extends MetadataVersioned_js_1.MetadataVersioned {
constructor(registry, value) {
// const timeStart = performance.now()
super(registry, (0, util_1.isU8a)(value) || (0, util_1.isString)(value)
? decodeU8a(registry, (0, util_1.u8aToU8a)(value))
: value);
// console.log('Metadata', `${(performance.now() - timeStart).toFixed(2)}ms`)
}
}
exports.Metadata = Metadata;