refactor: HL EVM signing via sonirico/go-hyperliquid SDK

hl_helper/node_modules/@msgpack/msgpack/dist.esm/timestamp.d.ts

@@ -0,0 +1,15 @@
+export declare const EXT_TIMESTAMP = -1;
+export type TimeSpec = {
+    sec: number;
+    nsec: number;
+};
+export declare function encodeTimeSpecToTimestamp({ sec, nsec }: TimeSpec): Uint8Array;
+export declare function encodeDateToTimeSpec(date: Date): TimeSpec;
+export declare function encodeTimestampExtension(object: unknown): Uint8Array | null;
+export declare function decodeTimestampToTimeSpec(data: Uint8Array): TimeSpec;
+export declare function decodeTimestampExtension(data: Uint8Array): Date;
+export declare const timestampExtension: {
+    type: number;
+    encode: typeof encodeTimestampExtension;
+    decode: typeof decodeTimestampExtension;
+};