# Context

Context in which the SDK is being used

* Holds the current low level API
* Holds the current keyring pair
* Holds the current Identity

## Hierarchy

* **Context**

## Index

### Properties

* [currentPair](/polymesh-sdk-api-reference/docs-v7/classes/context.md#optional-currentpair)
* [isArchiveNode](/polymesh-sdk-api-reference/docs-v7/classes/context.md#isarchivenode)
* [polymeshApi](/polymesh-sdk-api-reference/docs-v7/classes/context.md#polymeshapi)
* [ss58Format](/polymesh-sdk-api-reference/docs-v7/classes/context.md#ss58format)

### Accessors

* [middlewareApi](/polymesh-sdk-api-reference/docs-v7/classes/context.md#middlewareapi)

### Methods

* [accountBalance](/polymesh-sdk-api-reference/docs-v7/classes/context.md#accountbalance)
* [addPair](/polymesh-sdk-api-reference/docs-v7/classes/context.md#addpair)
* [clone](/polymesh-sdk-api-reference/docs-v7/classes/context.md#clone)
* [disconnect](/polymesh-sdk-api-reference/docs-v7/classes/context.md#disconnect)
* [getAccounts](/polymesh-sdk-api-reference/docs-v7/classes/context.md#getaccounts)
* [getCurrentAccount](/polymesh-sdk-api-reference/docs-v7/classes/context.md#getcurrentaccount)
* [getCurrentIdentity](/polymesh-sdk-api-reference/docs-v7/classes/context.md#getcurrentidentity)
* [getCurrentPair](/polymesh-sdk-api-reference/docs-v7/classes/context.md#getcurrentpair)
* [getInvalidDids](/polymesh-sdk-api-reference/docs-v7/classes/context.md#getinvaliddids)
* [getLatestBlock](/polymesh-sdk-api-reference/docs-v7/classes/context.md#getlatestblock)
* [getSigner](/polymesh-sdk-api-reference/docs-v7/classes/context.md#getsigner)
* [getTransactionArguments](/polymesh-sdk-api-reference/docs-v7/classes/context.md#gettransactionarguments)
* [getTransactionFees](/polymesh-sdk-api-reference/docs-v7/classes/context.md#gettransactionfees)
* [isMiddlewareAvailable](/polymesh-sdk-api-reference/docs-v7/classes/context.md#ismiddlewareavailable)
* [isMiddlewareEnabled](/polymesh-sdk-api-reference/docs-v7/classes/context.md#ismiddlewareenabled)
* [issuedClaims](/polymesh-sdk-api-reference/docs-v7/classes/context.md#issuedclaims)
* [queryMiddleware](/polymesh-sdk-api-reference/docs-v7/classes/context.md#querymiddleware)
* [setPair](/polymesh-sdk-api-reference/docs-v7/classes/context.md#setpair)
* [create](/polymesh-sdk-api-reference/docs-v7/classes/context.md#static-create)

## Properties

### `Optional` currentPair

• **currentPair**? : [*KeyringPair*](/polymesh-sdk-api-reference/docs-v7/interfaces/keyringpair.md)

*Defined in* [*src/base/Context.ts:114*](https://github.com/PolymathNetwork/polymesh-sdk/blob/bf2b7a12/src/base/Context.ts#L114)

### isArchiveNode

• **isArchiveNode**: *boolean* = false

*Defined in* [*src/base/Context.ts:119*](https://github.com/PolymathNetwork/polymesh-sdk/blob/bf2b7a12/src/base/Context.ts#L119)

Whether the current node is an archive node (contains a full history from genesis onward) or not

### polymeshApi

• **polymeshApi**: *ApiPromise*

*Defined in* [*src/base/Context.ts:112*](https://github.com/PolymathNetwork/polymesh-sdk/blob/bf2b7a12/src/base/Context.ts#L112)

### ss58Format

• **ss58Format**: *number*

*Defined in* [*src/base/Context.ts:121*](https://github.com/PolymathNetwork/polymesh-sdk/blob/bf2b7a12/src/base/Context.ts#L121)

## Accessors

### middlewareApi

• **get middlewareApi**(): *ApolloClient‹NormalizedCacheObject›*

*Defined in* [*src/base/Context.ts:953*](https://github.com/PolymathNetwork/polymesh-sdk/blob/bf2b7a12/src/base/Context.ts#L953)

Retrieve the middleware client

**`throws`** if the middleware is not enabled

**Returns:** *ApolloClient‹NormalizedCacheObject›*

## Methods

### accountBalance

▸ **accountBalance**(`account?`: string | [Account](/polymesh-sdk-api-reference/docs-v7/classes/account.md)): *Promise‹*[*AccountBalance*](/polymesh-sdk-api-reference/docs-v7/globals.md#accountbalance)*›*

*Defined in* [*src/base/Context.ts:344*](https://github.com/PolymathNetwork/polymesh-sdk/blob/bf2b7a12/src/base/Context.ts#L344)

Retrieve the account level POLYX balance

**`note`** can be subscribed to

**Parameters:**

| Name       | Type                                                                        |
| ---------- | --------------------------------------------------------------------------- |
| `account?` | string \| [Account](/polymesh-sdk-api-reference/docs-v7/classes/account.md) |

**Returns:** *Promise‹*[*AccountBalance*](/polymesh-sdk-api-reference/docs-v7/globals.md#accountbalance)*›*

▸ **accountBalance**(`account`: string | [Account](/polymesh-sdk-api-reference/docs-v7/classes/account.md) | undefined, `callback`: [SubCallback](/polymesh-sdk-api-reference/docs-v7/globals.md#subcallback)‹[AccountBalance](/polymesh-sdk-api-reference/docs-v7/globals.md#accountbalance)›): *Promise‹*[*UnsubCallback*](/polymesh-sdk-api-reference/docs-v7/globals.md#unsubcallback)*›*

*Defined in* [*src/base/Context.ts:345*](https://github.com/PolymathNetwork/polymesh-sdk/blob/bf2b7a12/src/base/Context.ts#L345)

Retrieve the account level POLYX balance

**`note`** can be subscribed to

**Parameters:**

| Name       | Type                                                                                                                                                       |
| ---------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `account`  | string \| [Account](/polymesh-sdk-api-reference/docs-v7/classes/account.md) \| undefined                                                                   |
| `callback` | [SubCallback](/polymesh-sdk-api-reference/docs-v7/globals.md#subcallback)‹[AccountBalance](/polymesh-sdk-api-reference/docs-v7/globals.md#accountbalance)› |

**Returns:** *Promise‹*[*UnsubCallback*](/polymesh-sdk-api-reference/docs-v7/globals.md#unsubcallback)*›*

### addPair

▸ **addPair**(`params`: [AddPairParams](/polymesh-sdk-api-reference/docs-v7/globals.md#addpairparams)): [*KeyringPair*](/polymesh-sdk-api-reference/docs-v7/interfaces/keyringpair.md)

*Defined in* [*src/base/Context.ts:284*](https://github.com/PolymathNetwork/polymesh-sdk/blob/bf2b7a12/src/base/Context.ts#L284)

Add a signing pair to the Keyring

**Parameters:**

| Name     | Type                                                                          |
| -------- | ----------------------------------------------------------------------------- |
| `params` | [AddPairParams](/polymesh-sdk-api-reference/docs-v7/globals.md#addpairparams) |

**Returns:** [*KeyringPair*](/polymesh-sdk-api-reference/docs-v7/interfaces/keyringpair.md)

### clone

▸ **clone**(): [*Context*](/polymesh-sdk-api-reference/docs-v7/classes/context.md)

*Defined in* [*src/base/Context.ts:1041*](https://github.com/PolymathNetwork/polymesh-sdk/blob/bf2b7a12/src/base/Context.ts#L1041)

Returns a (shallow) clone of this instance. Useful for providing a separate Context to Procedures with different signers

**Returns:** [*Context*](/polymesh-sdk-api-reference/docs-v7/classes/context.md)

### disconnect

▸ **disconnect**(): *Promise‹void›*

*Defined in* [*src/base/Context.ts:1023*](https://github.com/PolymathNetwork/polymesh-sdk/blob/bf2b7a12/src/base/Context.ts#L1023)

Disconnect the Polkadot API, middleware, and render this instance unusable

**`note`** after disconnecting, trying to access any property in this objecct will result in an error

**Returns:** *Promise‹void›*

### getAccounts

▸ **getAccounts**(): *\[]*

*Defined in* [*src/base/Context.ts:261*](https://github.com/PolymathNetwork/polymesh-sdk/blob/bf2b7a12/src/base/Context.ts#L261)

Retrieve a list of Accounts that can act as signers

**Returns:** *\[]*

### getCurrentAccount

▸ **getCurrentAccount**(): [*CurrentAccount*](/polymesh-sdk-api-reference/docs-v7/classes/currentaccount.md)

*Defined in* [*src/base/Context.ts:406*](https://github.com/PolymathNetwork/polymesh-sdk/blob/bf2b7a12/src/base/Context.ts#L406)

Retrieve current Account

**`throws`** if there is no current account associated to the SDK instance

**Returns:** [*CurrentAccount*](/polymesh-sdk-api-reference/docs-v7/classes/currentaccount.md)

### getCurrentIdentity

▸ **getCurrentIdentity**(): *Promise‹*[*CurrentIdentity*](/polymesh-sdk-api-reference/docs-v7/classes/currentidentity.md)*›*

*Defined in* [*src/base/Context.ts:426*](https://github.com/PolymathNetwork/polymesh-sdk/blob/bf2b7a12/src/base/Context.ts#L426)

Retrieve current Identity

**`throws`** if there is no Identity associated to the current Account (or there is no current Account associated to the SDK instance)

**Returns:** *Promise‹*[*CurrentIdentity*](/polymesh-sdk-api-reference/docs-v7/classes/currentidentity.md)*›*

### getCurrentPair

▸ **getCurrentPair**(): [*KeyringPair*](/polymesh-sdk-api-reference/docs-v7/interfaces/keyringpair.md)

*Defined in* [*src/base/Context.ts:446*](https://github.com/PolymathNetwork/polymesh-sdk/blob/bf2b7a12/src/base/Context.ts#L446)

Retrieve current Keyring Pair

**`throws`** if there is no Account associated to the SDK instance

**Returns:** [*KeyringPair*](/polymesh-sdk-api-reference/docs-v7/interfaces/keyringpair.md)

### getInvalidDids

▸ **getInvalidDids**(`identities`: (string | [Identity](/polymesh-sdk-api-reference/docs-v7/classes/identity.md)‹›)\[]): *Promise‹string\[]›*

*Defined in* [*src/base/Context.ts:475*](https://github.com/PolymathNetwork/polymesh-sdk/blob/bf2b7a12/src/base/Context.ts#L475)

Check whether Identities exist

**Parameters:**

| Name         | Type                                                                                 |
| ------------ | ------------------------------------------------------------------------------------ |
| `identities` | (string \| [Identity](/polymesh-sdk-api-reference/docs-v7/classes/identity.md)‹›)\[] |

**Returns:** *Promise‹string\[]›*

### getLatestBlock

▸ **getLatestBlock**(): *Promise‹BigNumber›*

*Defined in* [*src/base/Context.ts:1011*](https://github.com/PolymathNetwork/polymesh-sdk/blob/bf2b7a12/src/base/Context.ts#L1011)

Retrieve the latest block number

**Returns:** *Promise‹BigNumber›*

### getSigner

▸ **getSigner**(): *AddressOrPair*

*Defined in* [*src/base/Context.ts:462*](https://github.com/PolymathNetwork/polymesh-sdk/blob/bf2b7a12/src/base/Context.ts#L462)

Retrieve the signer address (or keyring pair)

**Returns:** *AddressOrPair*

### getTransactionArguments

▸ **getTransactionArguments**(`args`: object): [*TransactionArgument*](/polymesh-sdk-api-reference/docs-v7/globals.md#transactionargument)*\[]*

*Defined in* [*src/base/Context.ts:525*](https://github.com/PolymathNetwork/polymesh-sdk/blob/bf2b7a12/src/base/Context.ts#L525)

Retrieve the types of arguments that a certain transaction requires to be run

**Parameters:**

▪ **args**: *object*

| Name  | Type  | Description                                                                      |
| ----- | ----- | -------------------------------------------------------------------------------- |
| `tag` | TxTag | tag associated with the transaction that will be executed if the proposal passes |

**Returns:** [*TransactionArgument*](/polymesh-sdk-api-reference/docs-v7/globals.md#transactionargument)*\[]*

### getTransactionFees

▸ **getTransactionFees**(`tag`: TxTag): *Promise‹BigNumber›*

*Defined in* [*src/base/Context.ts:498*](https://github.com/PolymathNetwork/polymesh-sdk/blob/bf2b7a12/src/base/Context.ts#L498)

Retrieve the protocol fees associated with running a specific transaction

**Parameters:**

| Name  | Type  | Description                                                            |
| ----- | ----- | ---------------------------------------------------------------------- |
| `tag` | TxTag | transaction tag (i.e. TxTags.asset.CreateAsset or "asset.createAsset") |

**Returns:** *Promise‹BigNumber›*

### isMiddlewareAvailable

▸ **isMiddlewareAvailable**(): *Promise‹boolean›*

*Defined in* [*src/base/Context.ts:998*](https://github.com/PolymathNetwork/polymesh-sdk/blob/bf2b7a12/src/base/Context.ts#L998)

Return whether the middleware is enabled and online

**Returns:** *Promise‹boolean›*

### isMiddlewareEnabled

▸ **isMiddlewareEnabled**(): *boolean*

*Defined in* [*src/base/Context.ts:991*](https://github.com/PolymathNetwork/polymesh-sdk/blob/bf2b7a12/src/base/Context.ts#L991)

Return whether the middleware was enabled at startup

**Returns:** *boolean*

### issuedClaims

▸ **issuedClaims**(`opts`: object): *Promise‹*[*ResultSet*](/polymesh-sdk-api-reference/docs-v7/interfaces/resultset.md)*‹*[*ClaimData*](/polymesh-sdk-api-reference/docs-v7/interfaces/claimdata.md)*››*

*Defined in* [*src/base/Context.ts:902*](https://github.com/PolymathNetwork/polymesh-sdk/blob/bf2b7a12/src/base/Context.ts#L902)

Retrieve a list of claims. Can be filtered using parameters

**`note`** uses the middleware (optional)

**Parameters:**

▪`Default value` **opts**: *object*= {}

| Name                   | Type                                                                                                                                                                                                                                                         | Description                                                                               |
| ---------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | ----------------------------------------------------------------------------------------- |
| `claimTypes?`          | [Exclude](/polymesh-sdk-api-reference/docs-v7/enums/targettreatment.md#exclude)‹[ClaimType](/polymesh-sdk-api-reference/docs-v7/enums/claimtype.md), [InvestorUniquenessV2](/polymesh-sdk-api-reference/docs-v7/enums/claimtype.md#investoruniquenessv2)›\[] | types of the claims to fetch. Defaults to any type                                        |
| `includeExpired?`      | undefined \| false \| true                                                                                                                                                                                                                                   | whether to include expired claims. Defaults to true                                       |
| `size?`                | undefined \| number                                                                                                                                                                                                                                          | page size                                                                                 |
| `start?`               | undefined \| number                                                                                                                                                                                                                                          | page offset                                                                               |
| `targets?`             | (string \| [Identity](/polymesh-sdk-api-reference/docs-v7/classes/identity.md)‹›)\[]                                                                                                                                                                         | identities (or Identity IDs) for which to fetch claims (targets). Defaults to all targets |
| `trustedClaimIssuers?` | (string \| [Identity](/polymesh-sdk-api-reference/docs-v7/classes/identity.md)‹›)\[]                                                                                                                                                                         | identity IDs of claim issuers. Defaults to all claim issuers                              |

**Returns:** *Promise‹*[*ResultSet*](/polymesh-sdk-api-reference/docs-v7/interfaces/resultset.md)*‹*[*ClaimData*](/polymesh-sdk-api-reference/docs-v7/interfaces/claimdata.md)*››*

### queryMiddleware

▸ **queryMiddleware**‹**Result**›(`query`: GraphqlQuery‹unknown›): *Promise‹ApolloQueryResult‹Result››*

*Defined in* [*src/base/Context.ts:969*](https://github.com/PolymathNetwork/polymesh-sdk/blob/bf2b7a12/src/base/Context.ts#L969)

Make a query to the middleware server using the apollo client

**Type parameters:**

▪ **Result**: *Partial‹Query›*

**Parameters:**

| Name    | Type                  |
| ------- | --------------------- |
| `query` | GraphqlQuery‹unknown› |

**Returns:** *Promise‹ApolloQueryResult‹Result››*

### setPair

▸ **setPair**(`address`: string): *void*

*Defined in* [*src/base/Context.ts:326*](https://github.com/PolymathNetwork/polymesh-sdk/blob/bf2b7a12/src/base/Context.ts#L326)

Set a pair as the current Account keyring pair

**Parameters:**

| Name      | Type   |
| --------- | ------ |
| `address` | string |

**Returns:** *void*

### `Static` create

▸ **create**(`params`: object): *Promise‹*[*Context*](/polymesh-sdk-api-reference/docs-v7/classes/context.md)*›*

*Defined in* [*src/base/Context.ts:182*](https://github.com/PolymathNetwork/polymesh-sdk/blob/bf2b7a12/src/base/Context.ts#L182)

Create the Context instance

**Parameters:**

▪ **params**: *object*

| Name               | Type                                                                                                                                                      |
| ------------------ | --------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `accountMnemonic?` | undefined \| string                                                                                                                                       |
| `accountSeed?`     | undefined \| string                                                                                                                                       |
| `accountUri?`      | undefined \| string                                                                                                                                       |
| `keyring?`         | [CommonKeyring](/polymesh-sdk-api-reference/docs-v7/globals.md#commonkeyring) \| [UiKeyring](/polymesh-sdk-api-reference/docs-v7/interfaces/uikeyring.md) |
| `middlewareApi`    | ApolloClient‹NormalizedCacheObject› \| null                                                                                                               |
| `polymeshApi`      | ApiPromise                                                                                                                                                |

**Returns:** *Promise‹*[*Context*](/polymesh-sdk-api-reference/docs-v7/classes/context.md)*›*


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