Add optional startIndex to findAvailableTriggerOrderBit (#345)

CHANGELOG.md

@@ -3,6 +3,10 @@
 All notable changes to this project will be documented in this file.
 Version changes are pinned to SDK releases.
 
+## [1.19.1]
+
+- Add optional startIndex to findAvailableTriggerOrderBit(). ([#345](https://github.com/zetamarkets/sdk/pull/345))
+
 ## [1.19.0]
 
 - Add instruction to update maker fee percentage. ([#334](https://github.com/zetamarkets/sdk/pull/334))

package.json

@@ -1,7 +1,7 @@
 {
   "name": "@zetamarkets/sdk",
   "repository": "https://github.com/zetamarkets/sdk/",
-  "version": "1.19.0",
+  "version": "1.19.1",
   "description": "Zeta SDK",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",

src/cross-client.ts

@@ -1094,12 +1094,17 @@ export class CrossClient {
     return txId;
   }
 
-  public findAvailableTriggerOrderBit(): number {
+  /**
+   * Find the next available bit to store a trigger order (0 to 127)
+   * @param startIndex optional, the index from which to start looking (0 to 127)
+   * @returns the first available bit (0 to 127)
+   */
+  public findAvailableTriggerOrderBit(startIndex: number = 0): number {
     // If we haven't loaded properly for whatever reason just use the last index to minimise the chance of collisions
     if (!this.account || !this.account.triggerOrderBits) {
       return 127;
     }
-    for (var i = 0; i < 128; i++) {
+    for (var i = startIndex; i < 128; i++) {
       let mask: BN = new BN(1).shln(i); // 1 << i
       if (this.account.triggerOrderBits.and(mask).isZero()) {
         return i;