@polkadot/util
Version:
A collection of useful utilities for @polkadot
33 lines (32 loc) • 1.94 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.compactToU8a = exports.compactStripLength = exports.compactFromU8aLim = exports.compactFromU8a = exports.compactAddLength = void 0;
/**
* @description
* Encoding and decoding of parity-codec compact numbers. The codec is created
* to take up the least amount of space for a specific number. It performs the
* same function as Length, however differs in that it uses a variable number of
* bytes to do the actual encoding. From the Rust implementation for compact
* encoding:
*
* 0b00 00 00 00 / 00 00 00 00 / 00 00 00 00 / 00 00 00 00
* (0 ... 2**6 - 1) (u8)
* xx xx xx 00
* (2**6 ... 2**14 - 1) (u8, u16) low LH high
* yL yL yL 01 / yH yH yH yL
* (2**14 ... 2**30 - 1) (u16, u32) low LMMH high
* zL zL zL 10 / zM zM zM zL / zM zM zM zM / zH zH zH zM
* (2**30 ... 2**536 - 1) (u32, u64, u128, U256, U512, U520) straight LE-encoded
* nn nn nn 11 [ / zz zz zz zz ]{4 + n}
*
* Note: we use *LOW BITS* of the LSB in LE encoding to encode the 2 bit key.
*/
var addLength_js_1 = require("./addLength.js");
Object.defineProperty(exports, "compactAddLength", { enumerable: true, get: function () { return addLength_js_1.compactAddLength; } });
var fromU8a_js_1 = require("./fromU8a.js");
Object.defineProperty(exports, "compactFromU8a", { enumerable: true, get: function () { return fromU8a_js_1.compactFromU8a; } });
Object.defineProperty(exports, "compactFromU8aLim", { enumerable: true, get: function () { return fromU8a_js_1.compactFromU8aLim; } });
var stripLength_js_1 = require("./stripLength.js");
Object.defineProperty(exports, "compactStripLength", { enumerable: true, get: function () { return stripLength_js_1.compactStripLength; } });
var toU8a_js_1 = require("./toU8a.js");
Object.defineProperty(exports, "compactToU8a", { enumerable: true, get: function () { return toU8a_js_1.compactToU8a; } });