diff --git a/.gitignore b/.gitignore
index f0fc62a..b773e2b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 /node_modules/
 .env
+wallet.json
diff --git a/index.js b/index.js
index 951acc0..b57e258 100644
--- a/index.js
+++ b/index.js
@@ -5,12 +5,15 @@ const GiteaReviews = require('./lib/gitea-reviews');
 const GithubReviews = require('./lib/github-reviews');
 
 const ethers = require('ethers');
+const NonceManager = require('@ethersproject/experimental').NonceManager;
 const Kredits = require('kredits-contracts');
 const util = require('util');
 
 const yargs = require('yargs/yargs');
 const { hideBin } = require('yargs/helpers');
 
+const walletPath = process.env.KREDITS_WALLET_PATH || './wallet.json';
+const walletJson = require(walletPath);
 const providerUrl = process.env.KREDITS_PROVIDER_URL;
 const daoAddress = process.env.KREDITS_DAO_ADDRESS;
 
@@ -94,6 +97,21 @@ async function getAllReviews(repos, startDate, endDate) {
 }
 
 async function initializeKredits() {
+  //
+  // Ethereum wallet setup
+  //
+
+  let wallet;
+  try {
+    wallet = await ethers.Wallet.fromEncryptedJson(
+      walletJson,
+      process.env.KREDITS_WALLET_PASSWORD
+    );
+  } catch (error) {
+    console.log('Could not load wallet:', error);
+    process.exit(1);
+  }
+
   //
   // Ethereum provider/node setup
   //
@@ -104,6 +122,7 @@ async function initializeKredits() {
   } else {
     ethProvider = new ethers.getDefaultProvider('rinkeby');
   }
+  const signer = new NonceManager(wallet.connect(ethProvider));
 
   //
   // Kredits contracts setup
@@ -116,15 +135,55 @@ async function initializeKredits() {
   let kredits;
 
   try {
-    kredits = await new Kredits(ethProvider, null, opts).init();
+    kredits = await new Kredits(signer.provider, signer, opts).init();
   } catch (error) {
     console.log('Could not set up kredits:', error);
     process.exit(1);
   }
+  const Contributor = kredits.Contributor;
+  const Proposal = kredits.Proposal;
+  const Contribution = kredits.Contribution;
 
   return kredits;
 }
 
+function createContribution(
+  giteaUser,
+  date,
+  time,
+  amount,
+  kind,
+  description,
+  url,
+  details
+) {
+  return getContributorByGiteaUser(giteaUser).then((contributor) => {
+    console.log(
+      `Creating contribution token for ${amount}₭S to ${giteaUser} for ${url}...`
+    );
+
+    const contributionAttr = {
+      contributorId: contributor.id,
+      contributorIpfsHash: contributor.ipfsHash,
+      date,
+      time,
+      amount,
+      kind,
+      description,
+      url,
+      details,
+    };
+
+    console.log(`contribution attributes:`);
+    console.log(util.inspect(contributionAttr, { depth: 1, colors: true }));
+
+    // return Contribution.add(contributionAttr).catch(error => {
+    //   console.log(`I tried to add a contribution for ${giteaUser} for ${url}, but I encountered an error when submitting the tx:`);
+    //   console.log(`Error:`, error);
+    // });
+  });
+}
+
 async function generateContributionData(reviews, Contributor) {
   const contributors = await Contributor.all();
   const contributionData = {};