# wallet_createSignature

Creates a digital signature using wallet keys. Supply exactly one of data or hashToDirectlySign.

## Result

The BRC-100 createSignature result, encoded as JSON text. Wallet failures return an error result.

## Permissions

Forwarded to the connected wallet under the configured app origin. Its protocol, certificate or basket permission checks apply to the requested operation.

In role-routed configurations, walletRole selects an assigned wallet. Identity methods default to the identity role; encryption and HMAC use the encryption role. Transaction and basket operations follow their assigned role. An unavailable role fails rather than borrowing another key.

## Definition 1 (full)

Registered in: Legacy local wallet; Legacy local identity; External BRC-100 wallet.

Creates a digital signature using wallet keys. Supply exactly one of data or hashToDirectlySign.

| Field | Type | Required | Description | Constraints |
| --- | --- | --- | --- | --- |
| data | array of number | No | Data bytes to sign |  |
| hashToDirectlySign | array of number | No | Pre-computed 32-byte hash to sign directly |  |
| protocolIDJSON | string | Yes | JSON array [securityLevel, protocolString] |  |
| keyID | string | Yes |  |  |
| counterparty | string | No |  |  |
| privileged | boolean | No |  |  |
| privilegedReason | string | No |  |  |
| seekPermission | boolean | No |  |  |

Nested requirements apply when their parent is supplied.

### Input schema

```json
{
  "type": "object",
  "properties": {
    "data": {
      "description": "Data bytes to sign",
      "type": "array",
      "items": {
        "type": "number"
      }
    },
    "hashToDirectlySign": {
      "description": "Pre-computed 32-byte hash to sign directly",
      "type": "array",
      "items": {
        "type": "number"
      }
    },
    "protocolIDJSON": {
      "type": "string",
      "description": "JSON array [securityLevel, protocolString]"
    },
    "keyID": {
      "type": "string"
    },
    "counterparty": {
      "type": "string"
    },
    "privileged": {
      "type": "boolean"
    },
    "privilegedReason": {
      "type": "string"
    },
    "seekPermission": {
      "type": "boolean"
    }
  },
  "required": [
    "protocolIDJSON",
    "keyID"
  ],
  "$schema": "https://json-schema.org/draft/2020-12/schema"
}
```

## Definition 2 (full)

Registered in: Local Vault · broadcasting disabled; Local Vault · all roles; Local Vault · payment role only; Local Vault + sponsor.

Creates a digital signature using wallet keys. Supply exactly one of data or hashToDirectlySign.

| Field | Type | Required | Description | Constraints |
| --- | --- | --- | --- | --- |
| data | array of number | No | Data bytes to sign |  |
| hashToDirectlySign | array of number | No | Pre-computed 32-byte hash to sign directly |  |
| protocolIDJSON | string | Yes | JSON array [securityLevel, protocolString] |  |
| keyID | string | Yes |  |  |
| counterparty | string | No |  |  |
| privileged | boolean | No |  |  |
| privilegedReason | string | No |  |  |
| seekPermission | boolean | No |  |  |
| walletRole | "payments" \| "identity" \| "ordinals" \| "encryption" | No | Select the configured root key for this BRC-100 call. Defaults to the role for the method; action continuations retain their original role. |  |

Nested requirements apply when their parent is supplied.

### Input schema

```json
{
  "type": "object",
  "properties": {
    "data": {
      "description": "Data bytes to sign",
      "type": "array",
      "items": {
        "type": "number"
      }
    },
    "hashToDirectlySign": {
      "description": "Pre-computed 32-byte hash to sign directly",
      "type": "array",
      "items": {
        "type": "number"
      }
    },
    "protocolIDJSON": {
      "type": "string",
      "description": "JSON array [securityLevel, protocolString]"
    },
    "keyID": {
      "type": "string"
    },
    "counterparty": {
      "type": "string"
    },
    "privileged": {
      "type": "boolean"
    },
    "privilegedReason": {
      "type": "string"
    },
    "seekPermission": {
      "type": "boolean"
    },
    "walletRole": {
      "description": "Select the configured root key for this BRC-100 call. Defaults to the role for the method; action continuations retain their original role.",
      "type": "string",
      "enum": [
        "payments",
        "identity",
        "ordinals",
        "encryption"
      ]
    }
  },
  "required": [
    "protocolIDJSON",
    "keyID"
  ],
  "$schema": "https://json-schema.org/draft/2020-12/schema"
}
```

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