improve cash-in error handling

migrations/027-tx_errors.js

@@ -0,0 +1,21 @@
+var db = require('./db')
+
+exports.up = function (next) {
+  var sql = [
+    `create table cash_in_actions (
+      id serial primary key,
+      tx_id uuid references cash_in_txs not null,
+      action text not null,
+      error text,
+      error_code text,
+      tx_hash text,
+      success boolean not null,
+      created timestamptz not null default now()
+    )`
+  ]
+  db.multi(sql, next)
+}
+
+exports.down = function (next) {
+  next()
+}