> ## Documentation Index
> Fetch the complete documentation index at: https://docs.blnkfinance.com/llms.txt
> Use this file to discover all available pages before exploring further.
# Balance from Source
> Compute balance directly from transactions instead of using the default running balance.
export const CtaCallout = props => {
const {title, buttonLabel, href, trackingEvent, buttonTarget, rel = "noopener noreferrer", children} = props;
const handleCtaClick = () => {
if (typeof window === "undefined" || !trackingEvent) {
return;
}
try {
window.dispatchEvent(new CustomEvent("blnk:docs-cta", {
detail: {
name: trackingEvent,
href
}
}));
} catch {}
try {
window.posthog?.capture?.(trackingEvent, {
href
});
} catch {}
const gaPayload = {
cta_href: href
};
try {
window.gtag?.("event", trackingEvent, gaPayload);
} catch {}
try {
window.dataLayer = window.dataLayer || [];
window.dataLayer.push({
event: trackingEvent,
...gaPayload
});
} catch {}
};
const isExternal = typeof href === "string" && (/^https?:\/\//i).test(href);
const target = buttonTarget ?? (isExternal ? "_blank" : undefined);
const linkRel = isExternal ? rel : undefined;
return ;
};
Available in version 0.10.1 and later.
The [Balance from Source](/reference/balance-from-source) endpoint allows you to compute a balance directly from its transactions instead of using the default running balance.
This is useful when you need to verify balance accuracy, perform audits, or ensure consistency by calculating balances independently from the stored balance values.
```bash cURL wrap theme={"system"}
curl -X GET "http://YOUR_BLNK_INSTANCE_URL/balances/{balance_id}?from_source=true" \
-H "X-blnk-key: "
```
```typescript TypeScript wrap theme={"system"}
const response = await blnk.LedgerBalances.get(
'bln_5ce86029-3c2e-4e2a-aae2-7fb931ca4c4f',
{
from_source: true,
},
);
```
```go Go wrap theme={"system"}
at, _ := time.Parse(time.RFC3339, "2024-04-22T15:28:03+00:00")
balance, resp, err := client.LedgerBalance.GetHistorical(
"bln_5ce86029-3c2e-4e2a-aae2-7fb931ca4c4f",
at,
true,
)
```
```json Response theme={"system"}
{
"balance": {
"balance": 9620000,
"balance_id": "bin_be16c4a1-b5a6-4b64-a733-de2f6b24813d",
"credit_balance": 9620000,
"currency": "USD",
"debit_balance": 0,
"ledger_id": ""
}
}
```
***
## How it works
When you call the balance from source endpoint, Blnk reconstructs the balance by:
1. **Getting all applied transactions:** Blnk retrieves all applied transactions for the balance and aggregates them together. As a result, it may take longer to process for balances with extensive transaction history.
2. **Calculating credits and debits:** It aggregates all credit transactions (money moving into the balance) and debit transactions (money moving out of the balance) to compute the total credit balance, debit balance, and net balance.
3. **Returning the computed balance:** The final computed balance, reflecting the exact state based on transaction history, is returned in the response.
Balances at specific past timestamps.
Point-in-time copies of running balances.
***
## Need help?
We are very happy to help you make the most of Blnk, regardless of whether it is your first time or you are switching from another tool.
To ask questions or discuss issues, please [contact us](mailto:support@blnkfinance.com) or [join our Discord community](https://discord.gg/7WNv94zPpx).
Sign up and manage your ledger with our back-office dashboard. You can invite teammates to collaborate and manage your ledger operations directly from the dashboard.