> ## 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.
# Compile and save instruction
> Compile a Watch DSL script and persist it as an instruction for transaction evaluation.
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 ;
};
Blnk Watch is currently in beta. [Send us a message](mailto:support@blnkfinance.com)
Use this endpoint to compile a Watch DSL script and save it as an instruction. Once saved, Watch evaluates incoming transactions against the compiled rule.
For DSL syntax and examples, see [Watch rule examples](/watch/rules/examples/basic-conditions).
### Body
The Watch DSL script to compile. The rule name is extracted from the script and must be unique across instructions.
```bash theme={"system"}
curl -X POST http://localhost:8081/compile-and-save-instruction \
-H "Content-Type: application/json" \
-d '{
"script": "rule HighValueTransaction {\n description \"Review any transaction above $10,000\"\n when amount > 10000\n then review\n score 0.5\n reason \"Amount exceeds threshold\"\n}"
}'
```
```json 201 theme={"system"}
{
"id": 1,
"name": "HighValueTransaction",
"text": "rule HighValueTransaction {\n description \"Review any transaction above $10,000\"\n when amount > 10000\n then review\n score 0.5\n reason \"Amount exceeds threshold\"\n}",
"description": "Review any transaction above $10,000",
"dsl_json": "{\"name\":\"HighValueTransaction\",\"when\":[...],\"then\":{...}}",
"created_at": "2026-03-16T10:00:00Z",
"updated_at": "2026-03-16T10:00:00Z"
}
```
```text 400 theme={"system"}
Missing required field: script cannot be empty
```
```text 409 theme={"system"}
Failed to save instruction: An instruction with name 'HighValueTransaction' already exists.
```
```text 500 theme={"system"}
Failed to compile script: ...
```
### Response fields
Auto-generated instruction ID. Use this with [get instruction](/watch/reference/get-instruction) and [delete instruction](/watch/reference/delete-instruction).
Unique rule name extracted from the DSL script.
Original Watch DSL script text.
Rule description from the DSL script, if provided.
Compiled rule JSON used during transaction evaluation.
ISO 8601 timestamp of when the instruction was created.
ISO 8601 timestamp of when the instruction was last updated.
***
## 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).
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