---
title: "Get register constants"
method: GET
path: "/v1/operations/register_constants"
tags: ["Operations"]
---

# Get register constants

`GET /v1/operations/register_constants`

Returns a list of register global constant operations.

## Query parameters

- `sender` AccountParameter
  - `eq` string, nullable — **Equal** filter mode (optional, i.e. `param.eq=123` is the same as `param=123`). \ Specify a `tz` or `KT` address to get items where the specified field is equal to the specified value. Example: `?sender=tz1WnfXMPaNTBmH7DBPwqCWs9cPDJdkGBTZ8`.
  - `ne` string, nullable — **Not equal** filter mode. \ Specify a `tz` or `KT` address to get items where the specified field is not equal to the specified value. Example: `?sender.ne=tz1WnfXMPaNTBmH7DBPwqCWs9cPDJdkGBTZ8`.
  - `in` string[], nullable — **In list** (any of) filter mode. \ Specify a comma-separated list of addresses to get items where the specified field is equal to one of the specified values. Example: `?sender.in=tz1WnfXMPaNTBWnfXMPaNTBWnfXMPaNTBNTB,tz1SiPXX4MYGNJNDSiPXX4MYGNJNDSiPXX4M`.
  - `ni` string[], nullable — **Not in list** (none of) filter mode. \ Specify a comma-separated list of addresses to get items where the specified field is not equal to all the specified values. Example: `?sender.ni=tz1WnfXMPaNTBWnfXMPaNTBWnfXMPaNTBNTB,tz1SiPXX4MYGNJNDSiPXX4MYGNJNDSiPXX4M`.
  - `eqx` string, nullable — **Equal to another field** filter mode. \ Specify a field name to get items where the specified fields are equal. Example: `?sender.eqx=target`.
  - `nex` string, nullable — **Not equal to another field** filter mode. \ Specify a field name to get items where the specified fields are not equal. Example: `?sender.nex=initiator`.
  - `null` boolean, nullable — **Is null** filter mode. \ Use this mode to get items where the specified field is null or not. Example: `?initiator.null` or `?initiator.null=false`.
- `address` ExpressionParameter
  - `eq` string, nullable — **Equal** filter mode (optional, i.e. `param.eq=123` is the same as `param=123`). \ Specify an expression hash to get items where the specified field is equal to the specified value. Example: `?address=expr...`.
  - `ne` string, nullable — **Not equal** filter mode. \ Specify an expression hash to get items where the specified field is not equal to the specified value. Example: `?address.ne=expr...`.
  - `in` string[], nullable — **In list** (any of) filter mode. \ Specify a comma-separated list of expression hashes to get items where the specified field is equal to one of the specified values. Example: `?address.in=expr1,expr2`.
  - `ni` string[], nullable — **Not in list** (none of) filter mode. \ Specify a comma-separated list of expression hashes to get items where the specified field is not equal to all the specified values. Example: `?address.ni=expr1,expr2`.
- `level` Int32Parameter
  - `eq` integer, nullable — **Equal** filter mode (optional, i.e. `param.eq=123` is the same as `param=123`). \ Specify an integer number to get items where the specified field is equal to the specified value. Example: `?balance=1234`.
  - `ne` integer, nullable — **Not equal** filter mode. \ Specify an integer number to get items where the specified field is not equal to the specified value. Example: `?balance.ne=1234`.
  - `gt` integer, nullable — **Greater than** filter mode. \ Specify an integer number to get items where the specified field is greater than the specified value. Example: `?balance.gt=1234`.
  - `ge` integer, nullable — **Greater or equal** filter mode. \ Specify an integer number to get items where the specified field is greater than equal to the specified value. Example: `?balance.ge=1234`.
  - `lt` integer, nullable — **Less than** filter mode. \ Specify an integer number to get items where the specified field is less than the specified value. Example: `?balance.lt=1234`.
  - `le` integer, nullable — **Less or equal** filter mode. \ Specify an integer number to get items where the specified field is less than or equal to the specified value. Example: `?balance.le=1234`.
  - `in` integer[], nullable — **In list** (any of) filter mode. \ Specify a comma-separated list of integers to get items where the specified field is equal to one of the specified values. Example: `?level.in=12,14,52,69`.
  - `ni` integer[], nullable — **Not in list** (none of) filter mode. \ Specify a comma-separated list of integers to get items where the specified field is not equal to all the specified values. Example: `?level.ni=12,14,52,69`.
- `timestamp` TimestampParameter
  - `eq` string, date-time, nullable — **Equal** filter mode (optional, i.e. `param.eq=123` is the same as `param=123`). \ Specify a datetime value to get items where the specified field is equal to the specified value. Example: `?timestamp=2020-02-20T02:40:57Z`.
  - `ne` string, date-time, nullable — **Not equal** filter mode. \ Specify a datetime value to get items where the specified field is not equal to the specified value. Example: `?timestamp.ne=2020-02-20T02:40:57Z`.
  - `gt` string, date-time, nullable — **Greater than** filter mode. \ Specify a datetime value to get items where the specified field is greater than the specified value. Example: `?timestamp.gt=2020-02-20T02:40:57Z`.
  - `ge` string, date-time, nullable — **Greater or equal** filter mode. \ Specify a datetime value to get items where the specified field is greater than equal to the specified value. Example: `?timestamp.ge=2020-02-20T02:40:57Z`.
  - `lt` string, date-time, nullable — **Less than** filter mode. \ Specify a datetime value to get items where the specified field is less than the specified value. Example: `?timestamp.lt=2020-02-20T02:40:57Z`.
  - `le` string, date-time, nullable — **Less or equal** filter mode. \ Specify a datetime value to get items where the specified field is less than or equal to the specified value. Example: `?timestamp.le=2020-02-20T02:40:57Z`.
  - `in` string[], nullable — **In list** (any of) filter mode. \ Specify a comma-separated list of datetimes to get items where the specified field is equal to one of the specified values. Example: `?timestamp.in=2020-02-20,2020-02-21`.
  - `ni` string[], nullable — **Not in list** (none of) filter mode. \ Specify a comma-separated list of datetimes to get items where the specified field is not equal to all the specified values. Example: `?timestamp.ni=2020-02-20,2020-02-21`.
- `status` OperationStatusParameter
  - `eq` string, nullable — **Equal** filter mode (optional, i.e. `param.eq=applied` is the same as `param=applied`). \ Specify an operation status to get items where the specified field is equal to the specified value. Example: `?type=failed`.
  - `ne` string, nullable — **Not equal** filter mode. \ Specify an operation status to get items where the specified field is not equal to the specified value. Example: `?type.ne=applied`.
- `select` SelectParameter
  - `fields` string[], nullable — **Fields** selection mode (optional, i.e. `select.fields=balance` is the same as `select=balance`). \ Specify a comma-separated list of fields to include into response. Example: `?select=address,balance` => `[ { "address": "asd", "balance": 10 } ]`.
  - `values` string[], nullable — **Values** selection mode. \ Specify a comma-separated list of fields to include their values into response. Example: `?select.values=address,balance` => `[ [ "asd", 10 ] ]`.
- `sort` SortParameter
  - `asc` string, nullable — **Ascending** sort mode (optional, i.e. `sort.asc=id` is the same as `sort=id`). \ Specify a field name to sort by. Example: `?sort=balance`.
  - `desc` string, nullable — **Descending** sort mode. \ Specify a field name to sort by descending. Example: `?sort.desc=id`.
- `offset` OffsetParameter
  - `el` integer, nullable — **Elements** offset mode (optional, i.e. `offset.el=123` is the same as `offset=123`). \ Skips specified number of elements. Example: `?offset=100`.
  - `pg` integer, nullable — **Page** offset mode. \ Skips `page * limit` elements. This is a classic pagination. Example: `?offset.pg=1`.
  - `cr` integer, nullable — **Cursor** offset mode. \ Skips all elements with the `cursor` before (including) the specified value. Cursor is a field used for sorting, e.g. `id`. Avoid using this offset mode with non-unique or non-sequential cursors such as `amount`, `balance`, etc. Example: `?offset.cr=45837`.
- `limit` integer
- `micheline` 'Json' | 'JsonString' | 'Raw' | 'RawString'
- `quote` 'None' | 'Btc' | 'Eur' | 'Usd' | 'Cny' | 'Jpy' | 'Krw' | 'Eth' | 'Gbp'

## Response `200`

- RegisterConstantOperation[]
  - `type` string — Type of the operation, `register_constant` - is used to register a global constant - Micheline expression that can be reused by multiple smart contracts
  - `id` integer — Unique ID of the operation, stored in the TzKT indexer database
  - `level` integer — The height of the block from the genesis block, in which the operation was included
  - `timestamp` string, date-time — Datetime of the block, in which the operation was included (ISO 8601, e.g. `2020-02-20T02:40:57Z`)
  - `block` string, required — Hash of the block, in which the operation was included
  - `hash` string, required — Hash of the operation
  - `sender` Alias, required
    - `alias` string, nullable — Account alias name (off-chain data).
    - `address` string, required — Account address (public key hash).
  - `counter` integer — An account nonce which is used to prevent operation replay
  - `gasLimit` integer — A cap on the amount of gas a given operation can consume
  - `gasUsed` integer — Amount of gas, consumed by the operation
  - `storageLimit` integer — A cap on the amount of storage a given operation can consume
  - `storageUsed` integer — Amount of storage, consumed by the operation
  - `bakerFee` integer — Fee to the baker, produced block, in which the operation was included (micro tez)
  - `storageFee` integer — The amount of funds burned from the sender account for used the blockchain storage (micro tez)
  - `status` string, required — Operation status (`applied` - an operation applied by the node and successfully added to the blockchain, `failed` - an operation which failed with some particular error (not enough balance, gas limit, etc), `backtracked` - an operation which was successful but reverted due to one of the following operations in the same operation group was failed, `skipped` - all operations after the failed one in an operation group)
  - `address` string, nullable — Global address of the registered constant (null if the operation failed)
  - `value` unknown
  - `errors` OperationError[], nullable — List of errors provided by the node, injected the operation to the blockchain. `null` if there is no errors
    - `type` string, required — Type of an error (`error.id`, `contract.balance_too_low`, `contract.non_existing_contract`, `contract.manager.unregistered_delegate`, etc.) https://tezos.gitlab.io/api/errors.html - full list of errors
  - `quote` QuoteShort
    - `btc` number, double, nullable — XTZ/BTC price
    - `eur` number, double, nullable — XTZ/EUR price
    - `usd` number, double, nullable — XTZ/USD price
    - `cny` number, double, nullable — XTZ/CNY price
    - `jpy` number, double, nullable — XTZ/JPY price
    - `krw` number, double, nullable — XTZ/KRW price
    - `eth` number, double, nullable — XTZ/ETH price
    - `gbp` number, double, nullable — XTZ/GBP price

---

[API](https://skmtc.dev/tzkt/apis/tzkt-api.md) · [All operations](https://skmtc.dev/tzkt/apis/tzkt-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/tzkt/tzkt-api/revisions/a2e2aba5e534/schema)