> ## Documentation Index > Fetch the complete documentation index at: https://www.helius.dev/docs/llms.txt > Use this file to discover all available pages before exploring further. # getShieldedTransactionsByNullifiers > Retrieve shielded transaction events that spend the supplied nullifiers. ## Find Spending Transactions Use nullifiers derived by your wallet to find the transactions that spent its inputs. Nullifiers select transactions. Each entry in `result.data` holds every event of one selected Solana transaction, with its `slot` and `signature`. Supply between 1 and 1,000 nullifiers. See [pagination and freshness](https://www.helius.dev/docs/api-reference/privacy.md#pagination) for page limits, continuation tokens, and incremental reads. ## Request Parameters **filters** `object` Slot bounds. Resume a caught-up, uncapped read with `slot.gt` set to the last page's `context.slot`. **filters.slot** `object` Slot bounds for the read. Supplied bounds combine with AND. **filters.slot.gt** `number` Only include transactions after this slot. **filters.slot.gte** `number` Only include transactions at or after this slot. **filters.slot.lt** `number` Only include transactions before this slot. **filters.slot.lte** `number` Only include transactions at or before this slot. **limit** `number` (default: 1000) Maximum number of Solana transactions per page, from 1 to 1,000. **minContextSlot** `number` Minimum persisted indexer slot required for this read. Returns JSON-RPC error -32016 if the indexer is behind. **nullifiers** `array` *required* Base58-encoded 32-byte nullifiers to match against spent inputs. **paginationToken** `string` Continuation token from the previous response. Pass it back unchanged with the same nullifiers and slot filters. ## OpenAPI ````yaml openapi/privacy/getShieldedTransactionsByNullifiers.yaml POST /v1/spr/getShieldedTransactionsByNullifiers openapi: 3.0.3 info: title: Solana Privacy Rings API version: 0.51.2 description: >- Privacy indexer JSON-RPC API for encrypted state, history, proofs, and public registry records. servers: - url: https://devnet.helius-rpc.com description: Devnet Solana Privacy Rings API security: [] paths: /v1/spr/getShieldedTransactionsByNullifiers: post: summary: getShieldedTransactionsByNullifiers description: Retrieve shielded transaction events that spend the supplied nullifiers. operationId: getShieldedTransactionsByNullifiers requestBody: content: application/json: schema: type: object required: - jsonrpc - id - method - params properties: id: type: string description: An ID to identify the request. default: '1' jsonrpc: type: string description: The JSON-RPC protocol version. enum: - '2.0' default: '2.0' method: type: string description: The method to invoke. Must match the final URL path segment. enum: - getShieldedTransactionsByNullifiers default: getShieldedTransactionsByNullifiers params: type: object required: - nullifiers properties: filters: allOf: - $ref: '#/components/schemas/HistoryFilters' description: >- Slot bounds. Resume a caught-up, uncapped read with `slot.gt` set to the last page's `context.slot`. limit: type: integer format: uint64 maximum: 1000 minimum: 1 nullable: true default: 1000 description: >- Maximum number of Solana transactions per page, from 1 to 1,000. minContextSlot: type: integer format: uint64 minimum: 0 nullable: true description: >- Minimum persisted indexer slot required for this read. Returns JSON-RPC error -32016 if the indexer is behind. nullifiers: type: array items: $ref: '#/components/schemas/Hash' minItems: 1 maxItems: 1000 description: >- Base58-encoded 32-byte nullifiers to match against spent inputs. paginationToken: type: string description: >- Continuation token from the previous response. Pass it back unchanged with the same nullifiers and slot filters. nullable: true additionalProperties: false example: nullifiers: - '11111111111111111111111111111112' limit: 100 example: jsonrpc: '2.0' id: '1' method: getShieldedTransactionsByNullifiers params: nullifiers: - '11111111111111111111111111111112' limit: 100 required: true responses: '200': description: JSON-RPC response. Inspect error before reading result. content: application/json: schema: type: object required: - jsonrpc - id properties: error: type: object required: - code - message properties: code: type: integer message: type: string data: type: object additionalProperties: true id: type: string description: The request ID. jsonrpc: type: string description: The version of the JSON-RPC protocol. enum: - '2.0' result: type: object description: >- One bounded page of a history read, in gTFA-style pagination. required: - context - data - paginationToken properties: context: $ref: '#/components/schemas/Context' data: type: array items: type: object description: >- The returned events of one Solana transaction, in event order. required: - slot - signature - events properties: events: type: array items: $ref: '#/components/schemas/ShieldedTransaction' signature: $ref: '#/components/schemas/SerializableSignature' slot: type: integer format: uint64 minimum: 0 additionalProperties: false outputTreeId: type: integer format: uint16 description: >- The newest unpaused state tree ID. Omitted when unavailable. minimum: 0 paginationToken: type: string description: >- Token for the next page, null when no more results match. A caught-up read without an `lt` or `lte` bound resumes later with `filters.slot.gt` set to this page's `context.slot`; a capped read covers only slots up to its cap. nullable: true example: jsonrpc: '2.0' id: '1' result: context: slot: 4242 blockTime: 1730000000 data: [] paginationToken: null '400': description: >- Rejected before execution. A method/path mismatch, duplicate method fields, or a batch request returns -32601. An unreadable or oversized body returns -32600. content: application/json: schema: type: object required: - jsonrpc - id - error properties: jsonrpc: type: string enum: - '2.0' id: type: string nullable: true description: >- The request id, or null when the body is not a single JSON-RPC call. error: type: object required: - code - message properties: code: type: integer message: type: string data: type: object additionalProperties: true '429': description: Rate limit exceeded. content: application/json: schema: type: object required: - jsonrpc - id - error properties: jsonrpc: type: string enum: - '2.0' id: type: string nullable: true description: >- The request id, or null when the body is not a single JSON-RPC call. error: type: object required: - code - message properties: code: type: integer message: type: string data: type: object additionalProperties: true '500': description: Internal server error. content: application/json: schema: type: object required: - jsonrpc - id - error properties: jsonrpc: type: string enum: - '2.0' id: type: string nullable: true description: >- The request id, or null when the body is not a single JSON-RPC call. error: type: object required: - code - message properties: code: type: integer message: type: string data: type: object additionalProperties: true security: - ApiKeyQuery: [] components: schemas: HistoryFilters: type: object description: Optional slot bounds for the history query. properties: slot: $ref: '#/components/schemas/SlotFilter' additionalProperties: false Hash: type: string description: A base58-encoded 32-byte hash. Context: type: object required: - blockTime - slot properties: blockTime: type: integer format: int64 slot: type: integer format: uint64 description: >- Highest slot the indexer has persisted, for slot-based freshness checks. minimum: 0 ShieldedTransaction: type: object required: - slot - txSignature - txViewingPk - salt - outputSlots - messages - nullifiers - proofless properties: eventIndex: type: integer format: uint16 minimum: 0 messages: type: array items: $ref: '#/components/schemas/RingsMessage' description: >- Published data slots bound to no output commitment, republished verbatim. nullifiers: type: array items: $ref: '#/components/schemas/Hash' outputSlots: type: array items: $ref: '#/components/schemas/RingsOutputSlot' proofless: type: boolean description: True when at least one output in this transaction is proofless. ringConfig: type: string description: >- The ring's config account (its `ring_auth` PDA). Omitted when no ring authorized this transaction. ringProgramId: type: string description: >- The ring's program, resolved through the indexed registrations. Omitted when `ringConfig` is omitted or the ring's registration has not been indexed. Use `ringConfig` to tell "no ring" apart from "ring with an unindexed program". salt: type: string description: Transaction-level AES salt shared by every output ciphertext. nullable: true slot: type: integer format: uint64 minimum: 0 txSignature: $ref: '#/components/schemas/SerializableSignature' txViewingPk: type: string description: A base64-encoded byte string. nullable: true SerializableSignature: type: string description: A base58-encoded 64-byte Solana transaction signature. SlotFilter: type: object description: Slot bounds for the read. Supplied bounds combine with AND. properties: gt: type: integer format: uint64 minimum: 0 nullable: true description: Only include transactions after this slot. gte: type: integer format: uint64 minimum: 0 nullable: true description: Only include transactions at or after this slot. lt: type: integer format: uint64 minimum: 0 nullable: true description: Only include transactions before this slot. lte: type: integer format: uint64 minimum: 0 nullable: true description: Only include transactions at or before this slot. additionalProperties: false RingsMessage: type: object required: - viewTag - payload properties: payload: $ref: '#/components/schemas/Base64String' viewTag: $ref: '#/components/schemas/Hash' RingsOutputSlot: type: object required: - viewTag - outputContext - payload properties: outputContext: $ref: '#/components/schemas/RingsOutputContext' payload: $ref: '#/components/schemas/Base64String' viewTag: $ref: '#/components/schemas/Hash' Base64String: type: string description: A base64-encoded byte string. RingsOutputContext: type: object required: - hash - tree - treeId - leafIndex properties: hash: $ref: '#/components/schemas/Hash' leafIndex: type: integer format: uint64 minimum: 0 tree: allOf: - $ref: '#/components/schemas/SerializablePubkey' description: >- State tree account. Prefer treeId; the tree account is derived from it. deprecated: true treeId: type: integer format: uint16 description: The raw tree id the output's commitment is hashed under. minimum: 0 SerializablePubkey: type: string description: A base58-encoded Solana public key. securitySchemes: ApiKeyQuery: type: apiKey in: query name: api-key description: Your Helius API key. ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.