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@dfinity/nns

0.16.8-next-2023-09-18
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  • License Apache-2.0

A library for interfacing with the Internet Computer's Network Nervous System.

Package Exports

  • @dfinity/nns
  • @dfinity/nns/dist/cjs/index.cjs.js
  • @dfinity/nns/dist/esm/index.js

This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (@dfinity/nns) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.

Readme

nns-js

A library for interfacing with the Internet Computer's Network Nervous System.

npm version GitHub license

Table of contents

Installation

You can use nns-js by installing it in your project.

npm i @dfinity/nns

The bundle needs peer dependencies, be sure that following resources are available in your project as well.

npm i @dfinity/agent @dfinity/candid @dfinity/principal @dfinity/utils @dfinity/nns-proto

Usage

Most features are provided through the use of classes. e.g. querying the ledger for an account balance in a NodeJS context can be developed as following:

import { AccountIdentifier, LedgerCanister } from "@dfinity/nns";

// If not running in browser, add polyfill of `window.fetch` for agent-js to work.
import fetch from "cross-fetch";
global.fetch = fetch;

const main = async () => {
  const ledger = LedgerCanister.create();

  const accountIdentifier = AccountIdentifier.fromHex(
    "efa01544f509c56dd85449edf2381244a48fad1ede5183836229c00ab00d52df",
  );

  const balance = await ledger.accountBalance({ accountIdentifier });

  console.log(`Balance: ${balance}`);
};

await main();

Features

nns-js implements following features:

🧰 Functions

⚙️ ineligibleNeurons

Filter the neurons that are ineligible to vote to a proposal.

This feature needs the ballots of the proposal to contains accurate data. If the proposal has settled, as the ballots of the proposal are emptied for archive purpose, the function might return a list of ineligible neurons that are actually neurons that have not voted but would have been eligible.

Long story short, check the status of the proposal before using this function.

Function Type
ineligibleNeurons ({ neurons, proposal, }: { neurons: NeuronInfo[]; proposal: ProposalInfo; }) => NeuronInfo[]

Parameters:

  • params.neurons: The neurons to filter.
  • params.proposal: The proposal to match against the selected neurons.

🔗 Source

⚙️ votableNeurons

Filter the neurons that can vote for a proposal - i.e. the neurons that have not voted yet and are eligible

Function Type
votableNeurons ({ neurons, proposal, }: { neurons: NeuronInfo[]; proposal: ProposalInfo; }) => NeuronInfo[]

Parameters:

  • params.neurons: The neurons to filter.
  • params.proposal: The proposal to match against the selected neurons.

🔗 Source

⚙️ votedNeurons

Filter the neurons that have voted for a proposal.

Function Type
votedNeurons ({ neurons, proposal: { id: proposalId }, }: { neurons: NeuronInfo[]; proposal: ProposalInfo; }) => NeuronInfo[]

Parameters:

  • params.neurons: The neurons to filter.
  • params.proposal: The proposal for which some neurons might have already voted.

🔗 Source

🏭 AccountIdentifier

🔗 Source

Methods

⚙️ fromHex
Method Type
fromHex (hex: string) => AccountIdentifier

🔗 Source

⚙️ fromPrincipal
Method Type
fromPrincipal ({ principal, subAccount, }: { principal: Principal; subAccount?: SubAccount; }) => AccountIdentifier

🔗 Source

⚙️ toProto
Method Type
toProto () => Promise<AccountIdentifier>

🔗 Source

⚙️ toHex
Method Type
toHex () => string

🔗 Source

⚙️ toUint8Array
Method Type
toUint8Array () => Uint8Array

🔗 Source

⚙️ toNumbers
Method Type
toNumbers () => number[]

🔗 Source

⚙️ toAccountIdentifierHash
Method Type
toAccountIdentifierHash () => AccountIdentifier

🔗 Source

🏭 SubAccount

🔗 Source

Methods

⚙️ fromBytes
Method Type
fromBytes (bytes: Uint8Array) => SubAccount or Error

🔗 Source

⚙️ fromPrincipal
Method Type
fromPrincipal (principal: Principal) => SubAccount

🔗 Source

⚙️ fromID
Method Type
fromID (id: number) => SubAccount

🔗 Source

⚙️ toUint8Array
Method Type
toUint8Array () => Uint8Array

🔗 Source

🏭 GenesisTokenCanister

🔗 Source

Methods

⚙️ create
Method Type
create (options?: CanisterOptions<_SERVICE>) => GenesisTokenCanister

🔗 Source

⚙️ claimNeurons
Method Type
claimNeurons ({ hexPubKey, }: { hexPubKey: string; }) => Promise<bigint[]>

🔗 Source

🏭 LedgerCanister

🔗 Source

Methods

⚙️ create
Method Type
create (options?: LedgerCanisterOptions) => LedgerCanister

🔗 Source

⚙️ accountBalance

Returns the balance of the specified account identifier.

If certified is true, the request is fetched as an update call, otherwise it is fetched using a query call.

Method Type
accountBalance ({ accountIdentifier, certified, }: { accountIdentifier: AccountIdentifier; certified?: boolean; }) => Promise<bigint>

🔗 Source

⚙️ transactionFee

Returns the transaction fee of the ledger canister

Method Type
transactionFee () => Promise<bigint>

🔗 Source

⚙️ transfer

Transfer ICP from the caller to the destination accountIdentifier. Returns the index of the block containing the tx if it was successful.

Method Type
transfer (request: TransferRequest) => Promise<bigint>

🔗 Source

🏭 GovernanceCanister

🔗 Source

Methods

⚙️ create
Method Type
create (options?: GovernanceCanisterOptions) => GovernanceCanister

🔗 Source

⚙️ listNeurons

Returns the list of neurons controlled by the caller.

If an array of neuron IDs is provided, precisely those neurons will be fetched.

If certified is true, the request is fetched as an update call, otherwise it is fetched using a query call.

Method Type
listNeurons ({ certified, neuronIds, }: { certified: boolean; neuronIds?: bigint[]; }) => Promise<NeuronInfo[]>

🔗 Source

⚙️ listKnownNeurons

Returns the list of neurons who have been approved by the community to appear as the default followee options.

If certified is true, the request is fetched as an update call, otherwise it is fetched using a query call.

Method Type
listKnownNeurons (certified?: boolean) => Promise<KnownNeuron[]>

🔗 Source

⚙️ getLastestRewardEvent

Returns the latest reward event.

If certified is true, the request is fetched as an update call, otherwise it's fetched using a query call.

Method Type
getLastestRewardEvent (certified?: boolean) => Promise<RewardEvent>

🔗 Source

⚙️ listProposals

Returns the list of proposals made for the community to vote on, paginated and filtered by the request.

If certified is true (default), the request is fetched as an update call, otherwise it is fetched using a query call.

Method Type
listProposals ({ request, certified, }: { request: ListProposalsRequest; certified?: boolean; }) => Promise<ListProposalsResponse>

Parameters:

  • request: the options to list the proposals (limit number of results, topics to search for, etc.)
  • certified: query or update calls

🔗 Source

⚙️ stakeNeuron
Method Type
stakeNeuron ({ stake, principal, fromSubAccount, ledgerCanister, createdAt, fee, }: { stake: bigint; principal: Principal; fromSubAccount?: number[]; ledgerCanister: LedgerCanister; createdAt?: bigint; fee?: bigint; }) => Promise<bigint>

🔗 Source

⚙️ increaseDissolveDelay

Increases dissolve delay of a neuron

Method Type
increaseDissolveDelay ({ neuronId, additionalDissolveDelaySeconds, }: { neuronId: bigint; additionalDissolveDelaySeconds: number; }) => Promise<void>

🔗 Source

⚙️ setDissolveDelay

Sets dissolve delay of a neuron. The new date is now + dissolveDelaySeconds.

Method Type
setDissolveDelay ({ neuronId, dissolveDelaySeconds, }: { neuronId: bigint; dissolveDelaySeconds: number; }) => Promise<void>

🔗 Source

⚙️ startDissolving

Start dissolving process of a neuron

Method Type
startDissolving (neuronId: bigint) => Promise<void>

🔗 Source

⚙️ stopDissolving

Stop dissolving process of a neuron

Method Type
stopDissolving (neuronId: bigint) => Promise<void>

🔗 Source

⚙️ joinCommunityFund

Neuron joins the community fund

Method Type
joinCommunityFund (neuronId: bigint) => Promise<void>

🔗 Source

⚙️ autoStakeMaturity

Changes auto-stake maturity for this Neuron. While on, auto-stake maturity will cause all the maturity generated by voting rewards to this neuron to be automatically staked and contribute to the voting power of the neuron.

Method Type
autoStakeMaturity (params: { neuronId: bigint; autoStake: boolean; }) => Promise<void>

Parameters:

  • neuronId: The id of the neuron for which to request a change of the auto stake feature
  • autoStake: true to enable the auto-stake maturity for this neuron, false to turn it off

🔗 Source

⚙️ leaveCommunityFund

Neuron leaves the community fund

Method Type
leaveCommunityFund (neuronId: bigint) => Promise<void>

🔗 Source

⚙️ setNodeProviderAccount

Sets node provider reward account. Where the reward is paid to.

Method Type
setNodeProviderAccount (accountIdentifier: string) => Promise<void>

🔗 Source

⚙️ mergeNeurons

Merge two neurons

Method Type
mergeNeurons (request: { sourceNeuronId: bigint; targetNeuronId: bigint; }) => Promise<void>

🔗 Source

⚙️ simulateMergeNeurons

Simulate merging two neurons

Method Type
simulateMergeNeurons (request: { sourceNeuronId: bigint; targetNeuronId: bigint; }) => Promise<NeuronInfo>

🔗 Source

⚙️ splitNeuron

Splits a neuron creating a new one

Method Type
splitNeuron ({ neuronId, amount, }: { neuronId: bigint; amount: bigint; }) => Promise<bigint>

🔗 Source

⚙️ getProposal

Returns single proposal info

If certified is true (default), the request is fetched as an update call, otherwise it is fetched using a query call.

Method Type
getProposal ({ proposalId, certified, }: { proposalId: bigint; certified?: boolean; }) => Promise<ProposalInfo>

🔗 Source

⚙️ makeProposal

Create new proposal

Method Type
makeProposal (request: MakeProposalRequest) => Promise<void>

🔗 Source

⚙️ registerVote

Registers vote for a proposal from the neuron passed.

Method Type
registerVote ({ neuronId, vote, proposalId, }: { neuronId: bigint; vote: Vote; proposalId: bigint; }) => Promise<void>

🔗 Source

⚙️ setFollowees

Edit neuron followees per topic

Method Type
setFollowees (followRequest: FollowRequest) => Promise<void>

🔗 Source

⚙️ disburse

Disburse neuron on Account

Method Type
disburse ({ neuronId, toAccountId, amount, }: { neuronId: bigint; toAccountId?: string; amount?: bigint; }) => Promise<void>

🔗 Source

⚙️ mergeMaturity

Merge Maturity of a neuron

Method Type
mergeMaturity ({ neuronId, percentageToMerge, }: { neuronId: bigint; percentageToMerge: number; }) => Promise<void>

🔗 Source

⚙️ stakeMaturity

Stake the maturity of a neuron.

Method Type
stakeMaturity ({ neuronId, percentageToStake, }: { neuronId: bigint; percentageToStake?: number; }) => Promise<void>

Parameters:

  • neuronId: The id of the neuron for which to stake the maturity
  • percentageToStake: Optional. Percentage of the current maturity to stake. If not provided, all of the neuron's current maturity will be staked.

🔗 Source

⚙️ spawnNeuron

Merge Maturity of a neuron

Method Type
spawnNeuron ({ neuronId, percentageToSpawn, newController, nonce, }: { neuronId: bigint; percentageToSpawn?: number; newController?: Principal; nonce?: bigint; }) => Promise<bigint>

🔗 Source

⚙️ addHotkey

Add hotkey to neuron

Method Type
addHotkey ({ neuronId, principal, }: { neuronId: bigint; principal: Principal; }) => Promise<void>

🔗 Source

⚙️ removeHotkey

Remove hotkey to neuron

Method Type
removeHotkey ({ neuronId, principal, }: { neuronId: bigint; principal: Principal; }) => Promise<void>

🔗 Source

⚙️ claimOrRefreshNeuronFromAccount

Gets the NeuronID of a newly created neuron.

Method Type
claimOrRefreshNeuronFromAccount ({ memo, controller, }: { memo: bigint; controller?: Principal; }) => Promise<bigint>

🔗 Source

⚙️ claimOrRefreshNeuron

Refreshes neuron and returns neuronId when successful Uses query call only.

Method Type
claimOrRefreshNeuron (request: ClaimOrRefreshNeuronRequest) => Promise<bigint>

🔗 Source

⚙️ getNeuron

Return the data of the neuron provided as id.

Method Type
getNeuron ({ certified, neuronId, }: { certified: boolean; neuronId: bigint; }) => Promise<NeuronInfo>

🔗 Source

🏭 ICP

We don't extend to keep fromE8s and fromString as backwards compatible.

🔗 Source

Methods

⚙️ fromE8s
Method Type
fromE8s (amount: bigint) => ICP

🔗 Source

⚙️ fromString

Initialize from a string. Accepted formats:

1234567.8901 1'234'567.8901 1,234,567.8901

Method Type
fromString (amount: string) => ICP or FromStringToTokenError

🔗 Source

⚙️ toE8s
Method Type
toE8s () => bigint

🔗 Source

⚙️ toProto
Method Type
toProto () => Promise<ICPTs>

🔗 Source

🏭 SnsWasmCanister

🔗 Source

Methods

⚙️ create
Method Type
create (options?: CanisterOptions<_SERVICE>) => SnsWasmCanister

🔗 Source

⚙️ listSnses
Method Type
listSnses ({ certified, }: { certified?: boolean; }) => Promise<DeployedSns[]>

🔗 Source