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
• addPair
• clone
• disconnect
• getAccounts
• getCurrentAccount
• getCurrentIdentity
• getCurrentPair
• getInvalidDids
• getLatestBlock
• getSigner
• getTransactionArguments
• getTransactionFees
• isMiddlewareAvailable
• isMiddlewareEnabled
• issuedClaims
• queryMiddleware
• setPair
• create

Properties

Optional currentPair

• currentPair? : KeyringPair

Defined in src/base/Context.ts:114

isArchiveNode

• isArchiveNode: boolean = false

Defined in src/base/Context.ts:119

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

ss58Format

• ss58Format: number

Defined in src/base/Context.ts:121

Accessors

middlewareApi

• get middlewareApi(): ApolloClient‹NormalizedCacheObject›

Defined in src/base/Context.ts:953

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:344

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:345

Retrieve the account level POLYX balance

note can be subscribed to

Parameters:

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

Returns: Promise‹UnsubCallback›

addPair

▸ addPair(params: AddPairParams): KeyringPair

Defined in src/base/Context.ts:284

Add a signing pair to the Keyring

Parameters:

Name	Type
params	AddPairParams

Returns: KeyringPair

clone

▸ clone(): Context

Defined in src/base/Context.ts:1041

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:1023

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

Retrieve a list of Accounts that can act as signers

Returns: []

getCurrentAccount

▸ getCurrentAccount(): CurrentAccount

Defined in src/base/Context.ts:406

Retrieve current Account

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

Returns: CurrentAccount

getCurrentIdentity

▸ getCurrentIdentity(): Promise‹CurrentIdentity›

Defined in src/base/Context.ts:426

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›

getCurrentPair

▸ getCurrentPair(): KeyringPair

Defined in src/base/Context.ts:446

Retrieve current Keyring Pair

throws if there is no Account associated to the SDK instance

Returns: KeyringPair

getInvalidDids

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

Defined in src/base/Context.ts:475

Check whether Identities exist

Parameters:

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

Returns: Promise‹string[]›

getLatestBlock

▸ getLatestBlock(): Promise‹BigNumber›

Defined in src/base/Context.ts:1011

Retrieve the latest block number

Returns: Promise‹BigNumber›

getSigner

▸ getSigner(): AddressOrPair

Defined in src/base/Context.ts:462

Retrieve the signer address (or keyring pair)

Returns: AddressOrPair

getTransactionArguments

▸ getTransactionArguments(args: object): TransactionArgument[]

Defined in src/base/Context.ts:525

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:498

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

Return whether the middleware is enabled and online

Returns: Promise‹boolean›

isMiddlewareEnabled

▸ isMiddlewareEnabled(): boolean

Defined in src/base/Context.ts:991

Return whether the middleware was enabled at startup

Returns: boolean

issuedClaims

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

Defined in src/base/Context.ts:902

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:969

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

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:182

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›