> ## 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.
# Create matching rule
> Create a reconciliation matching rule with the Go SDK.
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 ;
};
Use `client.Reconciliation.CreateMatchingRule` to create a matching rule.
```go client.Reconciliation.CreateMatchingRule theme={"system"}
matchingRule, resp, err := client.Reconciliation.CreateMatchingRule(blnkgo.Matcher{
Name: "Amount match",
Description: "Match by amount with 1% drift",
Criteria: []blnkgo.Criteria{
{
Field: blnkgo.CriteriaFieldAmount,
Operator: blnkgo.ReconciliationOperatorEquals,
AllowableDrift: 0.01,
},
{
Field: blnkgo.CriteriaFieldCurrency,
Operator: blnkgo.ReconciliationOperatorEquals,
},
{
Field: blnkgo.CriteriaFieldReference,
Operator: blnkgo.ReconciliationOperatorContains,
},
},
})
```
| Field | Type | Description |
| :-------------------------- | :------------------------------ | :-------------------------------------------------------------------------------------------------------------------------------------------- |
| `Name` | `string` | Name of the matching rule. |
| `Description` | `string` | Short description of what the rule does. |
| `Criteria` | `[]blnkgo.Criteria` | Array of match criteria. Each entry sets how one field is compared. |
| `Criteria[].Field` | `blnkgo.CriteriaField` | Field to match: `CriteriaFieldAmount`, `CriteriaFieldCurrency`, `CriteriaFieldReference`, `CriteriaFieldDescription`, or `CriteriaFieldDate`. |
| `Criteria[].Operator` | `blnkgo.ReconciliationOperator` | How to compare the field: `ReconciliationOperatorEquals` or `ReconciliationOperatorContains`. |
| `Criteria[].AllowableDrift` | `float64` | Optional tolerance for `amount` (percentage) or `date` (seconds). |
Use `matchingRule.RuleID` in `MatchingRuleIDs` when you [start reconciliation](/sdks/go/reconciliation/start-reconciliation).
```json 201 Created wrap theme={"system"}
{
"rule_id": "rule_890bdbc4-467f-4670-8424-5667e41daf29",
"name": "Amount match",
"description": "Match by amount with 1% drift",
"criteria": [
{
"field": "amount",
"operator": "equals",
"allowable_drift": 0.01
}
],
"created_at": "2024-11-26T08:36:36.238244338Z",
"updated_at": "2024-11-26T08:36:36.238244338Z"
}
```
| Field | Type | Description |
| :----------- | :--------- | :-------------------------------------------------------------------- |
| `rule_id` | `string` | Unique ID for the rule. Store it to apply during reconciliation runs. |
| `name` | `string` | Rule name you passed. |
| `criteria` | `object[]` | The match criteria stored for the rule. |
| `created_at` | `string` | When the rule was created. |
| `updated_at` | `string` | When the rule was last updated. |
***
## Related docs
Criteria, operators, and drift behavior.
HTTP request and response schema.
***
## 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.