diff --git a/lib/postgresql_interface.js b/lib/postgresql_interface.js
index b66bd686..67286bde 100644
--- a/lib/postgresql_interface.js
+++ b/lib/postgresql_interface.js
@@ -258,9 +258,17 @@ exports.addTx = function addTx(deviceFingerprint, tx, cb) {
   });
 };
 
-exports.addDigitalTx = function addDigitalTx(dbTxId, err, txHash, fee) {
- console.log('DEBUG: adding digitaltx');
- console.dir([dbTxId, err, txHash, fee]);
+exports.addDigitalTx = function addDigitalTx(dbTxId, err, txHash) {
+  var keys = ['transaction_id', 'tx_hash', 'error'];
+  var values = [dbTxId, txHash, err && err.message];
+  var sql = getInsertQuery('digital_transactions', keys);
+
+  connect(function(err, client, done) {
+    query(client, sql, values, function(_err) {
+      done(_err);
+      if (_err) logger.error(_err);
+    });
+  });
 };
 
 /*
@@ -280,12 +288,11 @@ exports.fillCartridges =
   client.query(query, [cartridge1, cartridge2, fingerprint], cb);
 };
 */
-
-/* DEBUG
+/*
 exports.init('psql://lamassu:lamassu@localhost/lamassu');
 
 var fp = 'AB:9C:09:AA:7B:48:51:9A:0E:13:59:4E:5E:69:D0:74:E5:0F:4A:66';
 var txId = '5ef9c631-d948-4f0f-bf22-d2a563f5cd26';
 var tx = {txId: txId, currencyCode: 'USD', toAddress: '1xxx'};
-exports.addTx(fp, tx, function(err, result) { pg.end(); console.dir(result); });
+exports.addDigitalTx(198, new Error('insufficient funds'), null, function(err, result) { pg.end(); console.dir(result); });
 */