Bundle import txs into blocks, wait for confirmations

lib/addresses.json

@@ -1,4 +1,10 @@
 {
+  "31": {
+    "Contributor": "0x9C66a36fa6296EBb81d8F5D4642B05dF2CE85a8D",
+    "Contribution": "0xa12630a995337e45bDD746B6baedc1Ce2a1DCC9D",
+    "Token": "0x12Eb86338076450f86E5B552556028c7D21eaf1F",
+    "Reimbursement": "0xe2FE7cb00e2f94b8bA0AE526dfbe313f34c66E3C"
+  },
   "1337": {
     "Contributor": "0xCc66f9A3cA2670972938FAD91d0865c4a62DFB25",
     "Contribution": "0x8999CaBc43E28202c5A2257f2a95A45b1F8A62BD",

scripts/import/contributions.js

@@ -1,6 +1,8 @@
 const fs = require('fs');
 const Kredits = require('../../lib/kredits');
 
+const PARALLEL_TXS = 5;
+
 async function main() {
   kredits = new Kredits(hre.ethers.provider, hre.ethers.provider.getSigner())
   await kredits.init();
@@ -18,19 +20,40 @@ async function main() {
     const confirmationPeriod = 40320 // blocks
     const unconfirmedHeight = currentBlockHeight + confirmationPeriod;
 
-    for (const contributionId of ids) {
-      const c = contributions[contributionId.toString()];
+    const txBundlesAmount = Math.ceil(ids.length / PARALLEL_TXS);
+    let txBundles = [];
 
-      const confirmedAtBlock = c.confirmed ? currentBlockHeight : unconfirmedHeight;
+    for (let i = 0; i < txBundlesAmount; i++) {
+      txBundles.push(ids.slice((i * PARALLEL_TXS), (i * PARALLEL_TXS) + PARALLEL_TXS));
+    }
 
-      const result = await kredits.Contribution.contract.add(
-        c.amount, c.contributorId,
-        c.hashDigest, c.hashFunction, c.hashSize,
-        confirmedAtBlock, c.vetoed
-      );
-      // await result.wait();
-      console.log(`Added contribution #${contributionId}: ${result.hash}`);
-    };
+    for (const txBundle of txBundles) {
+      console.log(`Adding contributions #${txBundle[0]} to #${txBundle[txBundle.length - 1]}`)
+
+      let resultPromises = [];
+
+      for (const contributionId of txBundle) {
+        const c = contributions[contributionId.toString()];
+
+        const confirmedAtBlock = c.confirmed ? currentBlockHeight : unconfirmedHeight;
+
+        const result = await kredits.Contribution.contract.add(
+          c.amount, c.contributorId,
+          c.hashDigest, c.hashFunction, c.hashSize,
+          confirmedAtBlock, c.vetoed
+        );
+
+        resultPromises.push(result.wait());
+
+        console.log(`Added contribution #${contributionId}: ${result.hash}`);
+      }
+
+      console.log(`Waiting for confirmations...`);
+
+      await Promise.all(resultPromises);
+
+      console.log('Transactions confirmed');
+    }
   } catch(e) {
     console.log(e);
   }