> ## Documentation Index
> Fetch the complete documentation index at: https://docs.ownsi.dev/llms.txt
> Use this file to discover all available pages before exploring further.

# TypeScript

> @ownsi/sdk — one object over the API's own types, so a changed route is a compile error.

`@ownsi/sdk` is a thin layer over [Eden Treaty](https://elysiajs.com/eden/treaty/overview), which
infers the whole surface from the API's exported `App` type. There is no code-generation step and
nothing to keep in sync.

<Check>
  A route that changes shape becomes a **type error at the call site**, in the same commit.
</Check>

## Install

```bash theme={null}
bun add @ownsi/sdk
```

Inside this repo it is a workspace dependency and the types come from source. Outside it, the
package is not published yet, because
[the API is still internal](/api-reference/authentication#when-the-api-opens).

## Create the client

```ts api/ownsi.client.ts theme={null}
import { createOwnsi } from "@ownsi/sdk"

export const ownsi = createOwnsi({ baseUrl: window.location.origin })
```

Same origin, so the session cookie rides along with no extra configuration. Pass a `fetch` if you
need to route the calls somewhere else — a test, a worker, a proxy.

## Claim a domain

Three resources — a domain is a name, a claim is an episode, a verification is a process — and one
sentence over them.

```ts theme={null}
const domain = await ownsi.domains.findOrCreate("acme.com")
const claim = await domain.claim()

claim.record   // { host, name, type, value } — what to put in the DNS panel
claim.token    // immutable for the life of the claim
```

`findOrCreate` is idempotent on the name: asking twice returns the same domain. `domain.claim()`
answers `already_claimed` while one is still open — use the one you have, its token is the one
that will verify.

<Warning>
  Render `record.host`, not `record.name`. Almost every panel appends the zone to what you type,
  and a copy button that hands over the fully qualified name is how people end up with
  [`domain_appended`](/diagnostics/catalogue#domain_appended).
</Warning>

`claim.record` is singular because there is one record to write. It comes from the claim alone —
so the *write this record* screen renders with no verification loaded — and it is `null` once the
claim has ended, because there is nothing left to put in a panel.

## Follow the verification

The claim knows which process is running against it, so you never carry the id yourself.

```ts theme={null}
const verification = await claim.verification()

if (verification.status === "proved") done()
else show(verification.diagnosis?.fix ?? verification.waitEstimate)

await claim.recheck()   // reads DNS now instead of waiting for the schedule
```

Exactly one of `diagnosis` and `waitEstimate` is set while a verification is still running. One is
your reader's problem and one is not, which is
[the split the product exists for](/concepts/verification).

`verification.attempts()` is every read it has made, newest first — the evidence a proof rests on.

## Every act, in one table

|                       |                                                                                   |
| --------------------- | --------------------------------------------------------------------------------- |
| `ownsi.domains`       | `findOrCreate(name)` · `get(id)` · `list()`                                       |
| a `Domain`            | `.claim()` · `.claims()` · `.proof()` · `.archive()` · `.delete()` · `.refresh()` |
| `ownsi.claims`        | `create(domainId)` · `get(id)` · `list({ domainId? })`                            |
| a `Claim`             | `.record` · `.verification()` · `.recheck()` · `.cancel()` · `.refresh()`         |
| `ownsi.verifications` | `get(id)`                                                                         |
| a `Verification`      | `.run()` · `.attempts()` · `.refresh()`                                           |
| `ownsi.zones`         | `read(name, signal?)`                                                             |

Every read answers with a handle: the fields the API sent, plus the acts reachable from them.
`ownsi.api` is the Eden client underneath, for a route the package does not cover yet.

`list()` answers with `Claim`; `get()` and `create()` answer with `ClaimDetail`, which adds
`coexistence`. The list does not carry a field it did not fetch.

## The two dates a proof states

```ts theme={null}
const proof = await domain.proof()
// { firstVerifiedAt, lastConfirmedAt } — or null, if nothing has proved it
```

Derived across the domain's claims, never stored, so neither date can disagree with the claims it
is read from. `proofOf(claims)` is the same function if you already hold the list.

## Reading a zone

The public read streams, so it is a generator rather than a value.

```ts theme={null}
for await (const step of ownsi.zones.read("acme.com", signal)) {
  if (step.step === "delegation") setProvider(step.provider)
  if (step.step === "publishing") setWait(step.negativeCacheTtlSeconds)
}
```

`Extract` on the discriminant narrows any of the tagged unions in this API — zone steps on `step`,
diagnoses on `code`, wait estimates on `reason`. `ZoneDelegation` and `ZonePublishing` are exported
already narrowed.

## Errors

Everything throws an `OwnsiError`, carrying the API's own `code` and `docsUrl` untouched.

```ts theme={null}
import { isOwnsiError, RETRYABLE } from "@ownsi/sdk"

try {
  await domain.claim()
} catch (error) {
  if (isOwnsiError(error) && error.code === "already_claimed") useTheOpenOne()
  else throw error
}
```

`RETRYABLE` is the set worth trying again. `unreachable` is in it, and it is the one code the API
never sends: it means no answer arrived, or the answer was not ours. A request that never arrived
and a request that failed are both our side of the line, so both read as `unreachable` rather than
as something about somebody's domain.

## With TanStack Query

Keep the call in a hook rather than in a component, and let the error's `code` drive the retry.

```ts hooks/useVerificationState.ts theme={null}
export const useVerificationState = (claimId: string) =>
  useQuery({
    queryKey: ["verification", claimId],
    queryFn: async () => (await ownsi.claims.get(claimId)).verification(),
    retry: (attempt, error) => attempt < 2 && RETRYABLE.has(error.code),
    refetchInterval: (query) =>
      query.state.data?.status === "proved" ? false : 5_000,
  })
```

Stop polling on `proved`; keep polling while a `waitEstimate` says the wait is real. Forcing runs
in a loop does not make DNS answer faster — the verification's own `secondsRemaining` is the
honest interval.

## Authentication

Sessions are better-auth, not the SDK. It publishes its own typed client, and wrapping it would
buy a second name for every method and nothing else.

```ts api/auth.client.ts theme={null}
import type { Auth } from "@ownsi/api"
import { createAuthClient } from "better-auth/react"
import { inferAdditionalFields, magicLinkClient } from "better-auth/client/plugins"

export const authClient = createAuthClient({
  baseURL: window.location.origin,
  basePath: "/api/auth",
  plugins: [magicLinkClient(), inferAdditionalFields<Auth>()],
})
```

`inferAdditionalFields<Auth>()` types the session off the server's configured instance, the same
way Treaty types the routes.