fix: Make keyper threshold fraction configurable

Author: ulope

contracts/deploy/500_configure_keypers.js

@@ -2,5 +2,9 @@ const { configure_keypers } = require("../lib/configure-keypers.js");
 
 module.exports = async function (hre) {
   var keyperAddrs = await hre.getKeyperAddresses();
-  await configure_keypers(keyperAddrs, hre.deployConf.activationBlockOffset);
+  await configure_keypers(
+    keyperAddrs,
+    hre.deployConf.activationBlockOffset,
+    hre.deployConf.thresholdRatio
+  );
 };

contracts/hardhat.config.js

@@ -84,6 +84,7 @@ extendEnvironment((hre) => {
       collator: null,
       fundValue: "",
       activationBlockOffset: 30,
+      thresholdRatio: 2 / 3,
     };
   }
 

contracts/lib/configure-keypers.js

@@ -9,7 +9,11 @@ const { ethers } = require("hardhat");
 //TODO since we want to call this for new keypers
 // this should also check and eventually fund the
 // keypers if they are below the target funding.
-async function configure_keypers(keyperAddrs, blockOffset = 15) {
+async function configure_keypers(
+  keyperAddrs,
+  blockOffset = 15,
+  threshold_ratio = 2 / 3
+) {
   if (keyperAddrs.length == 0) {
     console.log("WARNING: cannot configure keypers: no keyper addresses given");
     return;
@@ -54,10 +58,11 @@ async function configure_keypers(keyperAddrs, blockOffset = 15) {
     return;
   }
 
+  const threshold = Math.ceil(keyperAddrs.length * threshold_ratio);
   const tx = await cfg.addNewCfg({
     activationBlockNumber: activationBlockNumber,
     setIndex: configSetIndex,
-    threshold: Math.ceil((keyperAddrs.length / 3) * 2),
+    threshold: threshold,
   });
   await tx.wait();
   console.log(