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Просмотр файла: edwards.d.ts
/**
* Twisted Edwards curve. The formula is: ax² + y² = 1 + dx²y².
* For design rationale of types / exports, see weierstrass module documentation.
* @module
*/
/*! noble-curves - MIT License (c) 2022 Paul Miller (paulmillr.com) */
import { type AffinePoint, type BasicCurve, type Group, type GroupConstructor } from './curve.js';
import { type FHash, type Hex } from './utils.js';
/** Edwards curves must declare params a & d. */
export type CurveType = BasicCurve<bigint> & {
a: bigint;
d: bigint;
hash: FHash;
randomBytes: (bytesLength?: number) => Uint8Array;
adjustScalarBytes?: (bytes: Uint8Array) => Uint8Array;
domain?: (data: Uint8Array, ctx: Uint8Array, phflag: boolean) => Uint8Array;
uvRatio?: (u: bigint, v: bigint) => {
isValid: boolean;
value: bigint;
};
prehash?: FHash;
mapToCurve?: (scalar: bigint[]) => AffinePoint<bigint>;
};
export type CurveTypeWithLength = Readonly<CurveType & {
nByteLength: number;
nBitLength: number;
}>;
declare function validateOpts(curve: CurveType): CurveTypeWithLength;
/** Instance of Extended Point with coordinates in X, Y, Z, T. */
export interface ExtPointType extends Group<ExtPointType> {
readonly ex: bigint;
readonly ey: bigint;
readonly ez: bigint;
readonly et: bigint;
get x(): bigint;
get y(): bigint;
assertValidity(): void;
multiply(scalar: bigint): ExtPointType;
multiplyUnsafe(scalar: bigint): ExtPointType;
isSmallOrder(): boolean;
isTorsionFree(): boolean;
clearCofactor(): ExtPointType;
toAffine(iz?: bigint): AffinePoint<bigint>;
toRawBytes(isCompressed?: boolean): Uint8Array;
toHex(isCompressed?: boolean): string;
_setWindowSize(windowSize: number): void;
}
/** Static methods of Extended Point with coordinates in X, Y, Z, T. */
export interface ExtPointConstructor extends GroupConstructor<ExtPointType> {
new (x: bigint, y: bigint, z: bigint, t: bigint): ExtPointType;
fromAffine(p: AffinePoint<bigint>): ExtPointType;
fromHex(hex: Hex): ExtPointType;
fromPrivateKey(privateKey: Hex): ExtPointType;
msm(points: ExtPointType[], scalars: bigint[]): ExtPointType;
}
/**
* Edwards Curve interface.
* Main methods: `getPublicKey(priv)`, `sign(msg, priv)`, `verify(sig, msg, pub)`.
*/
export type CurveFn = {
CURVE: ReturnType<typeof validateOpts>;
getPublicKey: (privateKey: Hex) => Uint8Array;
sign: (message: Hex, privateKey: Hex, options?: {
context?: Hex;
}) => Uint8Array;
verify: (sig: Hex, message: Hex, publicKey: Hex, options?: {
context?: Hex;
zip215: boolean;
}) => boolean;
ExtendedPoint: ExtPointConstructor;
utils: {
randomPrivateKey: () => Uint8Array;
getExtendedPublicKey: (key: Hex) => {
head: Uint8Array;
prefix: Uint8Array;
scalar: bigint;
point: ExtPointType;
pointBytes: Uint8Array;
};
precompute: (windowSize?: number, point?: ExtPointType) => ExtPointType;
};
};
/**
* Creates Twisted Edwards curve with EdDSA signatures.
* @example
* import { Field } from '@noble/curves/abstract/modular';
* // Before that, define BigInt-s: a, d, p, n, Gx, Gy, h
* const curve = twistedEdwards({ a, d, Fp: Field(p), n, Gx, Gy, h })
*/
export declare function twistedEdwards(curveDef: CurveType): CurveFn;
export {};
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