1 files changed, 57 insertions, 0 deletions
diff --git a/packages/typescript-typings/types/bn.js/index.d.ts b/packages/typescript-typings/types/bn.js/index.d.ts
new file mode 100644
index 000000000..f59b74bad
--- /dev/null
+++ b/packages/typescript-typings/types/bn.js/index.d.ts
@@ -0,0 +1,57 @@
+declare module 'bn.js' {
+    import { Buffer } from 'buffer';
+
+    type Endianness = 'le' | 'be';
+
+    class BN {
+        constructor(num: number | string | number[] | Buffer, base?: number, endian?: Endianness);
+        public clone(): BN;
+        public toString(base?: number, length?: number): string;
+        public toNumber(): number;
+        public toJSON(): string;
+        public toArray(endian?: Endianness, length?: number): number[];
+        public toBuffer(endian?: Endianness, length?: number): Buffer;
+        public bitLength(): number;
+        public zeroBits(): number;
+        public byteLength(): number;
+        public isNeg(): boolean;
+        public isEven(): boolean;
+        public isOdd(): boolean;
+        public isZero(): boolean;
+        public cmp(b: any): number;
+        public lt(b: any): boolean;
+        public lte(b: any): boolean;
+        public gt(b: any): boolean;
+        public gte(b: any): boolean;
+        public eq(b: any): boolean;
+        public isBN(b: any): boolean;
+
+        public neg(): BN;
+        public abs(): BN;
+        public add(b: BN): BN;
+        public sub(b: BN): BN;
+        public mul(b: BN): BN;
+        public sqr(): BN;
+        public pow(b: BN): BN;
+        public div(b: BN): BN;
+        public mod(b: BN): BN;
+        public divRound(b: BN): BN;
+
+        public or(b: BN): BN;
+        public and(b: BN): BN;
+        public xor(b: BN): BN;
+        public setn(b: number): BN;
+        public shln(b: number): BN;
+        public shrn(b: number): BN;
+        public testn(b: number): boolean;
+        public maskn(b: number): BN;
+        public bincn(b: number): BN;
+        public notn(w: number): BN;
+
+        public gcd(b: BN): BN;
+        public egcd(b: BN): { a: BN; b: BN; gcd: BN };
+        public invm(b: BN): BN;
+    }
+
+    export = BN;
+}