some refactoring

state/index.ts

@@ -159,3 +159,5 @@ if (typeof window !== "undefined") {
   });
 }
 export default state
+
+export * from './transactions'

state/transactions.ts

@@ -0,0 +1,58 @@
+import { proxy } from 'valtio';
+import { TransactionState } from '../components/Transaction';
+import { deepEqual } from '../utils/object';
+
+export const defaultTransaction: TransactionState = {
+    selectedTransaction: null,
+    selectedAccount: null,
+    selectedDestAccount: null,
+    txIsLoading: false,
+    txIsDisabled: false,
+    txFields: {},
+};
+
+export const transactionsState = proxy({
+    transactions: [
+        {
+            header: "test1.json",
+            state: defaultTransaction,
+        },
+    ],
+});
+
+/**
+ * Simple transaction state changer
+ * @param header Unique key and tab name for the transaction tab
+ * @param partialTx partial transaction state, `{}` resets the state and `undefined` deletes the transaction
+ */
+export const modifyTransaction = (
+    header: string,
+    partialTx?: Partial<TransactionState>
+) => {
+    const tx = transactionsState.transactions.find(tx => tx.header === header);
+
+    if (partialTx === undefined) {
+        transactionsState.transactions = transactionsState.transactions.filter(
+            tx => tx.header !== header
+        );
+        return;
+    }
+
+    if (!tx) {
+        transactionsState.transactions.push({
+            header,
+            state: {
+                ...defaultTransaction,
+                ...partialTx,
+            },
+        });
+        return;
+    }
+
+    Object.keys(partialTx).forEach(k => {
+        // Typescript mess here, but is definetly safe!
+        const s = tx.state as any;
+        const p = partialTx as any;
+        if (!deepEqual(s[k], p[k])) s[k] = p[k];
+    });
+};