diff --git a/lib/plugins.js b/lib/plugins.js
index 6c673b98..072454eb 100644
--- a/lib/plugins.js
+++ b/lib/plugins.js
@@ -40,6 +40,11 @@ var lastRates = {}
 
 var tradesQueues = {}
 
+var coins = {
+  BTC: {unitScale: 8},
+  ETH: {unitScale: 18}
+}
+
 // that's basically a constructor
 exports.init = function init (databaseHandle) {
   if (!databaseHandle) {
@@ -53,7 +58,7 @@ function loadPlugin (name, config) {
   // plugins definitions
   var moduleMethods = {
     ticker: ['ticker'],
-    trader: ['balance', 'purchase', 'sell'],
+    trader: ['purchase', 'sell'],
     wallet: ['balance', 'sendBitcoins', 'newAddress'],
     idVerifier: ['verifyUser', 'verifyTransaction'],
     info: ['checkAddress']
@@ -151,7 +156,7 @@ exports.configure = function configure (config) {
 
   cachedConfig = config
   deviceCurrency = config.exchanges.settings.currency
-  cryptoCodes = config.exchanges.settings.coins || ['BTC']
+  cryptoCodes = config.exchanges.settings.coins || ['BTC', 'ETH']
 
   cryptoCodes.forEach(function (cryptoCode) {
     // TICKER [required] configure (or load)
@@ -248,21 +253,29 @@ function _sendCoins (toAddress, cryptoAtoms, cryptoCode, cb) {
   if (cryptoCode === 'BTC') {
     walletPlugin.sendBitcoins(toAddress, cryptoAtoms, transactionFee, cb)
   } else {
-    walletPlugin.sendCoins(toAddress, cryptoAtoms, cryptoCode, transactionFee, cb)
+    walletPlugin.sendBitcoins(toAddress, cryptoAtoms, cryptoCode, transactionFee, cb)
   }
 }
 
 function executeTx (session, tx, authority, cb) {
   db.addOutgoingTx(session, tx, function (err, toSend) {
-    if (err) return cb(err)
-    var cryptoAtomsToSend = toSend.cryptoAtoms
+    if (err) {
+      logger.error(err)
+      return cb(err)
+    }
+    var cryptoAtomsToSend = toSend.satoshis
     if (cryptoAtomsToSend === 0) {
+      logger.debug('No cryptoAtoms to send')
       return cb(null, {statusCode: 204, txId: tx.txId, txHash: null})
     }
 
-    _sendCoins(tx.toAddress, cryptoAtomsToSend, function (_err, txHash) {
+    var cryptoCode = tx.cryptoCode
+    _sendCoins(tx.toAddress, cryptoAtomsToSend, cryptoCode, function (_err, txHash) {
       var fee = null // Need to fill this out in plugins
-      if (_err) toSend = {cryptoAtoms: new BigNumber(0), fiat: 0}
+      if (_err) {
+        logger.error(_err)
+        toSend = {cryptoAtoms: new BigNumber(0), fiat: 0}
+      }
       db.sentCoins(session, tx, authority, toSend, fee, _err, txHash)
 
       if (_err) return cb(_err)
@@ -291,6 +304,7 @@ function reapTx (row) {
     satoshis: row.satoshis,
     toAddress: row.to_address,
     currencyCode: row.currency_code,
+    cryptoCode: row.crypto_code,
     incoming: row.incoming
   }
   if (!row.incoming) reapOutgoingTx(session, tx)
@@ -314,6 +328,8 @@ function reapTxs () {
 
 // TODO: Run these in parallel and return success
 exports.trade = function trade (session, rawTrade, cb) {
+  logger.debug('DEBUG2')
+
   // TODO: move this to DB, too
   // add bill to trader queue (if trader is enabled)
   var cryptoCode = rawTrade.cryptoCode || 'BTC'
@@ -328,14 +344,18 @@ exports.trade = function trade (session, rawTrade, cb) {
     })
   }
 
+  logger.debug('DEBUG3')
+
   if (!rawTrade.toAddress) {
     var newRawTrade = _.cloneDeep(rawTrade)
     newRawTrade.toAddress = 'remit'
     return db.recordBill(session, newRawTrade, cb)
   }
 
+  logger.debug('DEBUG1')
+
   async.parallel([
-    async.apply(db.addOutgoingPending, session, rawTrade.currency, rawTrade.toAddress),
+    async.apply(db.addOutgoingPending, session, rawTrade.currency, rawTrade.cryptoCode, rawTrade.toAddress),
     async.apply(db.recordBill, session, rawTrade)
   ], cb)
 }
@@ -376,17 +396,14 @@ exports.fiatBalance = function fiatBalance (cryptoCode) {
   if (!rawRate || !lastBalance) return null
 
   // The rate is actually our commission times real rate.
-  var rate = commission * rawRate
+  var rate = rawRate.times(commission)
 
   // `lowBalanceMargin` is our safety net. It's a number > 1, and we divide
   // all our balances by it to provide a safety margin.
   var lowBalanceMargin = cachedConfig.exchanges.settings.lowBalanceMargin
 
-  // `balance.transferBalance` is the balance of our transfer account (the one
-  // we use to send Bitcoins to clients) in satoshis.
-  var transferBalance = lastBalance.transferBalance
-
-  var fiatTransferBalance = (transferBalance * rate) / lowBalanceMargin
+  var unitScale = new BigNumber(10).pow(coins[cryptoCode].unitScale)
+  var fiatTransferBalance = lastBalance.div(unitScale).times(rate).div(lowBalanceMargin)
 
   return fiatTransferBalance
 }
@@ -441,9 +458,9 @@ function pollBalance (cryptoCode, cb) {
       return cb && cb(err)
     }
 
-    logger.debug('[%s] Balance update:', cryptoCode, balance)
+    logger.debug('[%s] Balance update: %j', cryptoCode, balance)
     balance.timestamp = Date.now()
-    lastBalances[cryptoCode] = balance
+    lastBalances[cryptoCode] = new BigNumber(balance[cryptoCode])
 
     return cb && cb(null, lastBalances)
   })
@@ -472,7 +489,7 @@ function pollRate (cryptoCode, cb) {
       rates.ask = rates.ask && new BigNumber(rates.ask)
       rates.bid = rates.bid && new BigNumber(rates.bid)
     }
-    logger.debug('got rates: %j', resRates)
+    logger.debug('[%s] got rates: %j', cryptoCode, resRates)
 
     lastRates[cryptoCode] = resRates
 
@@ -495,9 +512,8 @@ exports.getDeviceRate = function getDeviceRate (cryptoCode) {
 
 exports.getBalance = function getBalance (cryptoCode) {
   var lastBalance = lastBalances[cryptoCode]
-  if (!lastBalance) return null
 
-  return lastBalance.transferBalance
+  return lastBalance
 }
 
 /*
diff --git a/lib/postgresql_interface.js b/lib/postgresql_interface.js
index ca58093d..bcae7cbd 100644
--- a/lib/postgresql_interface.js
+++ b/lib/postgresql_interface.js
@@ -284,6 +284,7 @@ function insertTx(client, session, incoming, tx, satoshis, fiat, stage,
     'to_address',
     'satoshis',
     'currency_code',
+    'crypto_code',
     'fiat',
     'tx_hash',
     'error'
@@ -298,6 +299,7 @@ function insertTx(client, session, incoming, tx, satoshis, fiat, stage,
     tx.toAddress,
     satoshis,
     tx.currencyCode,
+    tx.cryptoCode,
     fiat,
     tx.txHash,
     tx.error
@@ -322,13 +324,13 @@ function refreshPendingTx(client, session, cb) {
   });
 }
 
-function addPendingTx(client, session, incoming, currencyCode, toAddress,
+function addPendingTx(client, session, incoming, currencyCode, cryptoCode, toAddress,
     satoshis, cb) {
   var fields = ['device_fingerprint', 'session_id', 'incoming',
-    'currency_code', 'to_address', 'satoshis'];
+    'currency_code', 'crypto_code', 'to_address', 'satoshis'];
   var sql = getInsertQuery('pending_transactions', fields, false);
   var values = [session.fingerprint, session.id, incoming, currencyCode,
-    toAddress, satoshis];
+    cryptoCode, toAddress, satoshis];
   query(client, sql, values, function(err) {
     cb(err);
   });
@@ -402,14 +404,14 @@ function ensureNotFinal(client, session, cb) {
 }
 
 exports.addOutgoingPending = function addOutgoingPending(session, currencyCode,
-    toAddress, cb) {
+    cryptoCode, toAddress, cb) {
   connect(function(cerr, client, done) {
     if (cerr) return cb(cerr);
 
     async.series([
       async.apply(silentQuery, client, 'BEGIN', null),
       async.apply(ensureNotFinal, client, session),
-      async.apply(addPendingTx, client, session, false, currencyCode, toAddress,
+      async.apply(addPendingTx, client, session, false, currencyCode, cryptoCode, toAddress,
         0)
     ], function(err) {
       if (err) {
@@ -442,7 +444,7 @@ exports.addInitialIncoming = function addInitialIncoming(session, tx, cb) {
     async.series([
       async.apply(silentQuery, client, 'BEGIN', null),
       async.apply(addPendingTx, client, session, true, tx.currencyCode,
-        tx.toAddress, tx.satoshis),
+        tx.cryptoCode, tx.toAddress, tx.satoshis),
       async.apply(insertIncoming, client, session, tx, tx.satoshis, tx.fiat,
         'initial_request', 'pending')
     ], function(err) {
diff --git a/lib/routes.js b/lib/routes.js
index 8c46c35c..c6520654 100644
--- a/lib/routes.js
+++ b/lib/routes.js
@@ -46,13 +46,13 @@ function buildRates () {
 function buildBalances () {
   var cryptoCodes = plugins.getcryptoCodes()
 
-  var balances = {}
+  var _balances = {}
   cryptoCodes.forEach(function (cryptoCode) {
     var balance = plugins.fiatBalance(cryptoCode)
-    balances[cryptoCode] = balance
+    _balances[cryptoCode] = balance
   })
 
-  return balances
+  return _balances
 }
 
 function poll (req, res) {
@@ -106,6 +106,7 @@ function trade (req, res) {
   tx.cryptoAtoms = new BigNumber(tx.cryptoAtoms)
 
   plugins.trade(session(req), tx, function (err) {
+    if (err) logger.error(err)
     var statusCode = err ? 500 : 201
     res.json(statusCode, {err: err})
   })
@@ -235,7 +236,6 @@ function init (localConfig) {
   })
 
   localApp.post('/reboot', function (req, res) {
-    console.log('DEBUG1')
     var pid = req.body.pid
     var fingerprint = req.body.fingerprint
     console.log('pid: %s, fingerprint: %s', pid, fingerprint)
diff --git a/todo.txt b/todo.txt
index ec0e1d8f..f2fa57a4 100644
--- a/todo.txt
+++ b/todo.txt
@@ -7,3 +7,30 @@ backwards compatibility:
 
 - clean up db stuff satoshis/cryptoAtoms
 - clean up other stuff
+
+- add 'ETH' to config in ssu crypto: config.exchanges.settings.coins
+
+[2016-04-06T19:58:17.827Z] ERROR: lamassu-server/39374 on MacBook-Pro: null value in column "satoshis" violates not-null constraint
+    error: null value in column "satoshis" violates not-null constraint
+        at Connection.parseE (/Users/josh/projects/lamassu-server/node_modules/pg/lib/connection.js:539:11)
+        at Connection.parseMessage (/Users/josh/projects/lamassu-server/node_modules/pg/lib/connection.js:366:17)
+        at Socket.<anonymous> (/Users/josh/projects/lamassu-server/node_modules/pg/lib/connection.js:105:22)
+        at Socket.emit (events.js:95:17)
+        at Socket.<anonymous> (_stream_readable.js:765:14)
+        at Socket.emit (events.js:92:17)
+        at emitReadable_ (_stream_readable.js:427:10)
+        at emitReadable (_stream_readable.js:423:5)
+        at readableAddChunk (_stream_readable.js:166:9)
+        at Socket.Readable.push (_stream_readable.js:128:10)
+
+alter table transactions alter satoshis TYPE bigint;
+alter table transactions add crypto_code text default 'BTC';
+alter table pending_transactions add crypto_code text default 'BTC';
+alter table pending_transactions alter satoshis TYPE bigint;
+alter table bills add crypto_code text default 'BTC';
+alter table bills alter satoshis TYPE bigint;
+
+- get cryptoCode from pending tx
+- update cryptoCode for bills insert
+- insert correct satoshis in pending tx -- actually this is supposed to be 0
+- fix satoshi math in postgres module by moving to bignumber math