Tighten public indicator contracts

Author: rvitaliy

deno.jsonc

@@ -1,6 +1,6 @@
 {
   "name": "@rvitaliy/quantix",
-  "version": "1.0.4",
+  "version": "1.0.5",
   "description": "Streaming-first technical indicators in modern TypeScript.",
   "license": "MIT",
   "repository": {

src/core/ring-buffer.ts

@@ -56,7 +56,7 @@ export class RingBuffer<T> {
     return this.#values[(this.#cursor + index) % this.capacity];
   }
 
-  values(): T[] {
+  values(): ReadonlyArray<T> {
     if (this.#size === 0) {
       return [];
     }

src/indicators/bollinger-bands.ts

@@ -74,7 +74,7 @@ export class BollingerBands {
   }
 
   /** Computes a full Bollinger Bands series from an iterable input. */
-  static from(values: Iterable<number>, options: BollingerBandsOptions = {}): Array<
+  static from(values: Iterable<number>, options: BollingerBandsOptions = {}): ReadonlyArray<
     BollingerBandsResult | undefined
   > {
     const indicator = new BollingerBands(options);

src/indicators/rsi.ts

@@ -37,7 +37,7 @@ export class RSI {
   }
 
   /** Computes a full RSI series from an iterable input. */
-  static from(values: Iterable<number>, options: RSIOptions = {}): Array<number | undefined> {
+  static from(values: Iterable<number>, options: RSIOptions = {}): ReadonlyArray<number | undefined> {
     const indicator = new RSI(options);
     return Array.from(values, (value) => indicator.next(value));
   }

src/indicators/sma.ts

@@ -56,7 +56,7 @@ export class SMA {
   }
 
   /** Computes a full SMA series from an iterable input. */
-  static from(values: Iterable<number>, options: SMAOptions = {}): Array<number | undefined> {
+  static from(values: Iterable<number>, options: SMAOptions = {}): ReadonlyArray<number | undefined> {
     const indicator = new SMA(options);
     return Array.from(values, (value) => indicator.next(value));
   }

src/indicators/smma.ts

@@ -56,7 +56,7 @@ export class SMMA {
   }
 
   /** Computes a full SMMA series from an iterable input. */
-  static from(values: Iterable<number>, options: SMMAOptions = {}): Array<number | undefined> {
+  static from(values: Iterable<number>, options: SMMAOptions = {}): ReadonlyArray<number | undefined> {
     const indicator = new SMMA(options);
     return Array.from(values, (value) => indicator.next(value));
   }