> ## 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.
# Quick Start
> Install the Go SDK and create your first transaction.
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 ;
};
This guide walks you through installing the Blnk Go SDK, initializing the client, and creating your first transaction.
By the end, you'll have a working connection to Blnk and be ready to build financial products from your Go application.
Create a Go project and install the SDK. v1.2.0 and later require [Go 1.22 or later](https://go.dev/doc/install).
```bash wrap theme={"system"}
go mod init blnk-quickstart
go get github.com/blnkfinance/blnk-go
```
Parse your Blnk base URL and create a client. Pass a pointer to your API key when your instance requires authentication. The SDK sends it as the `X-Blnk-Key` header.
Use `nil` when running locally without auth.
```go client.go theme={"system"}
baseURL, _ := url.Parse("http://localhost:5001/")
apiKey := "your_api_key"
client := blnkgo.NewClient(
baseURL,
&apiKey,
blnkgo.WithTimeout(10*time.Second),
blnkgo.WithRetry(2),
)
```
Create a `main.go` file as shown below to create your first transaction with the SDK.
Make sure you have a running Blnk Core instance. Set the URL and API key as environment variables when your instance requires authentication.
```go main.go expandable theme={"system"}
package main
import (
"fmt"
"net/url"
"time"
blnkgo "github.com/blnkfinance/blnk-go"
)
func main() {
baseURL, _ := url.Parse("http://localhost:5001/")
client := blnkgo.NewClient(baseURL, nil, blnkgo.WithTimeout(10*time.Second), blnkgo.WithRetry(2))
transaction, resp, err := client.Transaction.Create(blnkgo.CreateTransactionRequest{
ParentTransaction: blnkgo.ParentTransaction{
PreciseAmount: 100000, Reference: "first_txn_001", Currency: "USD", Precision: 100,
Source: "@FundingPool", Destination: "@MyBalance", Description: "My first Blnk transaction",
},
AllowOverdraft: true,
})
if err != nil {
fmt.Printf("Error creating transaction: %v\n", err)
return
}
fmt.Printf("Transaction ID: %s\n", transaction.TransactionID)
fmt.Printf("Status: %s\n", transaction.Status)
fmt.Printf("HTTP status: %d\n", resp.StatusCode)
}
```
Run the file.
```bash wrap theme={"system"}
go run main.go
```
You should get a response similar to this:
```json 201 Created wrap expandable theme={"system"}
{
"amount": 1000,
"precision": 100,
"precise_amount": 100000,
"transaction_id": "txn_8d2ce2f0-0d75-4a91-9d43-2ad2c2e6b9ad",
"parent_transaction": "",
"source": "bln_f344b673-e855-4bda-b769-3e94a02c1941",
"destination": "bln_d5cbde84-d20a-485b-8ce8-6677d782c3a1",
"reference": "first_txn_001",
"currency": "USD",
"description": "My first Blnk transaction",
"status": "QUEUED",
"allow_overdraft": true,
"inflight": false,
"created_at": "2024-11-26T09:33:35.265582042Z"
}
```
Confirm the transaction landed in your ledger.
1. Open **Transactions** in the sidebar.
2. Find your transaction by reference (`first_txn_001`) or by the `transaction_id` from the script output.
3. Click the row to open the details and verify the amount, status, source, and destination.
If the transaction is missing, click **Refresh** on the table to pull the latest data from Core.
Fetch the transaction by ID:
```bash wrap theme={"system"}
blnk transactions list --id txn_8d2ce2f0-0d75-4a91-9d43-2ad2c2e6b9ad
```
Replace the transaction ID with the value printed by your script.
***
## Related docs
Authentication, timeouts, retries, and logging.
Three-value returns and Core error bodies.
Go SDK releases and version history.
***
## 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.