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

• isArchiveNode

• polymeshApi

• ss58Format

Accessors

• middlewareApi

Methods

• accountBalance

• accountSubsidy

• addPair

• clone

• disconnect

• getAccounts

• getCurrentAccount

• getCurrentIdentity

• getCurrentPair

• getInvalidDids

• getLatestBlock

• getNetworkVersion

• getSigner

• getTransactionArguments

• getTransactionFees

• isMiddlewareAvailable

• isMiddlewareEnabled

• issuedClaims

• queryMiddleware

• setPair

• create

Properties

Optional currentPair

• currentPair? : KeyringPair

Defined in src/base/Context.ts:111

---

isArchiveNode

• isArchiveNode: boolean = false

Defined in src/base/Context.ts:116

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:109

---

ss58Format

• ss58Format: number

Defined in src/base/Context.ts:118

Accessors

middlewareApi

• get middlewareApi(): ApolloClient‹NormalizedCacheObject›

Defined in src/base/Context.ts:1005

Retrieve the middleware client

throws if the middleware is not enabled

Returns: ApolloClient‹NormalizedCacheObject›

Methods

accountBalance

▸ accountBalance(account?: string | Account): Promise‹AccountBalance›

Defined in src/base/Context.ts:328

Retrieve the account level POLYX balance

note can be subscribed to

Parameters:

Name	Type
account?	string | Account

Returns: Promise‹AccountBalance›

▸ accountBalance(account: string | Account | undefined, callback: SubCallback‹AccountBalance›): Promise‹UnsubCallback›

Defined in src/base/Context.ts:329

Parameters:

Name	Type
account	string | Account | undefined
callback	SubCallback‹AccountBalance›

Returns: Promise‹UnsubCallback›

---

accountSubsidy

▸ accountSubsidy(account?: string | Account): Promise‹Omit‹Subsidy, "beneficiary"› | null›

Defined in src/base/Context.ts:386

Retrieve the account level subsidizer relationship. If there is no such relationship, return null

note can be subscribed to

Parameters:

Name	Type
account?	string | Account

Returns: Promise‹Omit‹Subsidy, "beneficiary"› | null›

▸ accountSubsidy(account: string | Account | undefined, callback: SubCallback‹Omit‹Subsidy, "beneficiary"› | null›): Promise‹UnsubCallback›

Defined in src/base/Context.ts:387

Parameters:

Name	Type
account	string | Account | undefined
callback	SubCallback‹Omit‹Subsidy, "beneficiary"› | null›

Returns: Promise‹UnsubCallback›

---

addPair

▸ addPair(params: AddPairParams): KeyringPair

Defined in src/base/Context.ts:263

Add a signing pair to the Keyring

Parameters:

Name	Type
params	AddPairParams

Returns: KeyringPair

---

clone

▸ clone(): Context

Defined in src/base/Context.ts:1102

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

Returns: Context

---

disconnect

▸ disconnect(): Promise‹void›

Defined in src/base/Context.ts:1084

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(): Account[]

Defined in src/base/Context.ts:240

Retrieve a list of Accounts that can act as signers. The first Account in the array is the current Account (default signer)

Returns: Account[]

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getCurrentAccount

▸ getCurrentAccount(): Account

Defined in src/base/Context.ts:442

Retrieve current Account

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

Returns: Account

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getCurrentIdentity

▸ getCurrentIdentity(): Promise‹Identity›

Defined in src/base/Context.ts:453

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‹Identity›

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getCurrentPair

▸ getCurrentPair(): KeyringPair

Defined in src/base/Context.ts:473

Retrieve current Keyring Pair

throws if there is no Account associated to the SDK instance

Returns: KeyringPair

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getInvalidDids

▸ getInvalidDids(identities: (string | Identity‹›)[]): Promise‹string[]›

Defined in src/base/Context.ts:502

Check whether Identities exist

Parameters:

Name	Type
identities	(string | Identity‹›)[]

Returns: Promise‹string[]›

---

getLatestBlock

▸ getLatestBlock(): Promise‹BigNumber›

Defined in src/base/Context.ts:1063

Retrieve the latest block number

Returns: Promise‹BigNumber›

---

getNetworkVersion

▸ getNetworkVersion(): Promise‹string›

Defined in src/base/Context.ts:1072

Retrieve the network version

Returns: Promise‹string›

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getSigner

▸ getSigner(): AddressOrPair

Defined in src/base/Context.ts:489

Retrieve the signer address (or keyring pair)

Returns: AddressOrPair

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getTransactionArguments

▸ getTransactionArguments(args: object): TransactionArgument[]

Defined in src/base/Context.ts:558

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[]

---

getTransactionFees

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

Defined in src/base/Context.ts:531

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:1050

Return whether the middleware is enabled and online

Returns: Promise‹boolean›

---

isMiddlewareEnabled

▸ isMiddlewareEnabled(): boolean

Defined in src/base/Context.ts:1043

Return whether the middleware was enabled at startup

Returns: boolean

---

issuedClaims

▸ issuedClaims(opts: object): Promise‹ResultSet‹ClaimData››

Defined in src/base/Context.ts:954

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‹ClaimType, 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‹›)[]	identities (or Identity IDs) for which to fetch claims (targets). Defaults to all targets
trustedClaimIssuers?	(string | Identity‹›)[]	identity IDs of claim issuers. Defaults to all claim issuers

Returns: Promise‹ResultSet‹ClaimData››

---

queryMiddleware

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

Defined in src/base/Context.ts:1021

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:305

Set a pair as the current Account keyring pair

Parameters:

Name	Type
address	string

Returns: void

---

Static create

▸ create(params: object): Promise‹Context›

Defined in src/base/Context.ts:165

Create the Context instance

Parameters:

▪ params: object

Name	Type
accountMnemonic?	undefined | string
accountSeed?	undefined | string
accountUri?	undefined | string
keyring?	CommonKeyring | UiKeyring
middlewareApi	ApolloClient‹NormalizedCacheObject› | null
polymeshApi	ApiPromise

Returns: Promise‹Context›