## State writes of a block `GET /v1/proofs/writes/{height}` Every MARF write the canonical block at `height` committed, in the node's write order, from this instance's indexed `state_writes`: the names a verifier needs to label each written leaf of the block's witness. A write the witness does not hold, or a leaf no write names, fails that check, so the rows are checked, not trusted. 404 when the instance has no writes for the block (its node did not subscribe to `state_writes` at that height); verifiers then report the diff unnamed. Near the tip the block at a height can change, so this is short-cached. Free and keyless: never metered, no account needed. Hosted limits: 10 requests per second per IP (1 for witnesses), or 20 (2) per account with a key. Bytes are passed through unchanged; verify them, do not trust them. ### Path parameters | Name | Type | Description | | --- | --- | --- | | `height` | integer, required | Stacks block height. | ### Returns One `BlockStateWrites` object. ### Responses - `200` The block's writes - `400` A path or query parameter is malformed (`VALIDATION_ERROR`): hashes must be exact-length hex, heights non-negative integers - `401` This bind requires the instance token, and it was missing or wrong - `404` No `state_writes` for a canonical block at that height - `429` Rate limited; retry after `Retry-After` seconds - `502` The node or proof sidecar could not be reached, or answered with an unexpected status (`PROOF_SOURCE_ERROR`) ### Example ```bash curl https://api.secondlayer.tools/v1/proofs/writes/9137005 \ -H "Authorization: Bearer $SECONDLAYER_API_KEY" ``` ```json { "block_height": 9137005, "state_writes": [ { "ordinal": 0, "tx_index": 0, "key": "vm::SP102V8P0F7JX67ARQ77WEA3D3CFB5XW39REDT0AM.amm-vault-v2-01::1::paused", "value_hex": "3033" } ] } ```