From 7dd44446df9c67119fe355dc79f80156106b00d7 Mon Sep 17 00:00:00 2001
From: havocmayhem <44165205+havocmayhem@users.noreply.github.com>
Date: Sun, 30 Dec 2018 20:58:42 +0530
Subject: [PATCH 1/4] Update NetscriptFunctions.js

---
 src/NetscriptFunctions.js | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/src/NetscriptFunctions.js b/src/NetscriptFunctions.js
index 9a32ce26d..eb058574a 100644
--- a/src/NetscriptFunctions.js
+++ b/src/NetscriptFunctions.js
@@ -3568,6 +3568,28 @@ function NetscriptFunctions(workerScript) {
             }
             return res;
         },
+        getAugmentationPrereq : function(name) {
+            var ramCost = CONSTANTS.ScriptSingularityFn3RamCost;
+            if (Player.bitNodeN !== 4) {ramCost *= CONSTANTS.ScriptSingularityFnRamMult;}
+            if (workerScript.checkingRam) {
+                return updateStaticRam("getAugmentationPrereq", ramCost);
+            }
+            updateDynamicRam("getAugmentationPrereq", ramCost);
+            if (Player.bitNodeN != 4) {
+                if (!(hasSingularitySF && singularitySFLvl >= 3)) {
+                    throw makeRuntimeRejectMsg(workerScript, "Cannot run getAugmentationPrereq(). It is a Singularity Function and requires SourceFile-4 (level 3) to run.");
+                    return false;
+                }
+            }
+
+            if (!augmentationExists(name)) {
+                workerScript.scriptRef.log("ERROR: getAugmentationPrereq() failed. Invalid Augmentation name passed in (note: this is case-sensitive): " + name);
+                return [-1, -1];
+            }
+
+            var aug = Augmentations[name];
+            return aug.prereqs;
+        },
         getAugmentationCost : function(name) {
             var ramCost = CONSTANTS.ScriptSingularityFn3RamCost;
             if (Player.bitNodeN !== 4) {ramCost *= CONSTANTS.ScriptSingularityFnRamMult;}

From 99987778afe627e393bd966e31dfc97ae7c8c6ce Mon Sep 17 00:00:00 2001
From: havocmayhem <44165205+havocmayhem@users.noreply.github.com>
Date: Sun, 30 Dec 2018 21:02:08 +0530
Subject: [PATCH 2/4] Added getAugmentationPrereq()

---
 netscript.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/netscript.js b/netscript.js
index b84426ef4..283d6e4c3 100644
--- a/netscript.js
+++ b/netscript.js
@@ -89,7 +89,7 @@ let NetscriptFunctions =
     "donateToFaction|"                                                         +
     "createProgram|commitCrime|getCrimeChance|getOwnedAugmentations|"          +
     "getOwnedSourceFiles|getAugmentationsFromFaction|"                         +
-    "getAugmentationCost|purchaseAugmentation|"                                +
+    "getAugmentationPrereq|getAugmentationCost|purchaseAugmentation|"          +
     "installAugmentations|"                                                    +
 
     // TIX API

From f8cccd56ac25ea355ba48654df383a1c2ba505bf Mon Sep 17 00:00:00 2001
From: havocmayhem <44165205+havocmayhem@users.noreply.github.com>
Date: Sun, 30 Dec 2018 21:07:23 +0530
Subject: [PATCH 3/4] Added getAugmentationPrereq()

---
 doc/source/netscriptsingularityfunctions.rst | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/doc/source/netscriptsingularityfunctions.rst b/doc/source/netscriptsingularityfunctions.rst
index e9b3e5f28..d56d09130 100644
--- a/doc/source/netscriptsingularityfunctions.rst
+++ b/doc/source/netscriptsingularityfunctions.rst
@@ -556,6 +556,20 @@ getAugmentationsFromFaction
 
     Returns an array containing the names (as strings) of all Augmentations that are available from the specified faction.
 
+getAugmentationPrereq
+-------------------
+
+.. js:function:: getAugmentationPrereq(augName)
+
+    :param string augName: Name of Augmentation. CASE-SENSITIVE
+
+    If you are not in BitNode-4, then you must have Level 3 of Source-File 4 in order to use this function.
+
+    This function returns an array with the names of the prerequisite Augmentation(s) for the specified Augmentation.
+    If there are no prerequisites, a blank array is returned.
+
+    If an invalid Augmentation name is passed in for the *augName* argument, this function will return a blank array.
+
 getAugmentationCost
 -------------------
 

From 984a2aa5d46154fc16f6604daf71ccc12f3be4d2 Mon Sep 17 00:00:00 2001
From: havocmayhem <44165205+havocmayhem@users.noreply.github.com>
Date: Sun, 30 Dec 2018 21:07:24 +0530
Subject: [PATCH 4/4] Update NetscriptFunctions.js

---
 src/NetscriptFunctions.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/NetscriptFunctions.js b/src/NetscriptFunctions.js
index eb058574a..015eebb12 100644
--- a/src/NetscriptFunctions.js
+++ b/src/NetscriptFunctions.js
@@ -3584,7 +3584,7 @@ function NetscriptFunctions(workerScript) {
 
             if (!augmentationExists(name)) {
                 workerScript.scriptRef.log("ERROR: getAugmentationPrereq() failed. Invalid Augmentation name passed in (note: this is case-sensitive): " + name);
-                return [-1, -1];
+                return [];
             }
 
             var aug = Augmentations[name];