StakingClient

@human-protocol/sdk / Modules / staking / StakingClient

Class: StakingClient

staking.StakingClient

Introduction

This client enables to perform actions on staking contracts and obtain staking information from both the contracts and subgraph.

Internally, the SDK will use one network or another according to the network ID of the signerOrProvider. To use this client, it is recommended to initialize it using the static build method.

static async build(signerOrProvider: Signer | Provider);

A Signer or a Provider should be passed depending on the use case of this module:

• Signer: when the user wants to use this model in order to send transactions caling the contract functions.

• Provider: when the user wants to use this model in order to get information from the contracts or subgraph.

Installation

npm

npm install @human-protocol/sdk

yarn

yarn install @human-protocol/sdk

Code example

Signer

Using private key(backend)

import { StakingClient } from '@human-protocol/sdk';
import { Wallet, providers } from 'ethers';

const rpcUrl = 'YOUR_RPC_URL';
const privateKey = 'YOUR_PRIVATE_KEY'

const provider = new providers.JsonRpcProvider(rpcUrl);
const signer = new Wallet(privateKey, provider);
const stakingClient = await StakingClient.build(signer);

Using Wagmi(frontend)

import { useSigner, useChainId } from 'wagmi';
import { StakingClient } from '@human-protocol/sdk';

const { data: signer } = useSigner();
const stakingClient = await StakingClient.build(signer);

Provider

import { StakingClient } from '@human-protocol/sdk';
import { providers } from 'ethers';

const rpcUrl = 'YOUR_RPC_URL';

const provider = new providers.JsonRpcProvider(rpcUrl);
const stakingClient = await StakingClient.build(provider);

Hierarchy

• BaseEthersClient

  ↳ StakingClient

Table of contents

Constructors

• constructor

Properties

• escrowFactoryContract

• gasPriceMultiplier

• networkData

• rewardPoolContract

• signerOrProvider

• stakingContract

• tokenContract

Methods

• allocate

• approveStake

• checkValidEscrow

• closeAllocation

• distributeReward

• gasPriceOptions

• getAllocation

• getLeader

• getLeaders

• getRewards

• slash

• stake

• unstake

• withdraw

• build

Constructors

constructor

• new StakingClient(signerOrProvider, networkData, gasPriceMultiplier?)

StakingClient constructor

Parameters

Name	Type	Description
signerOrProvider	Signer | Provider	The Signer or Provider object to interact with the Ethereum network
networkData	NetworkData	-
gasPriceMultiplier?	number	The multiplier to apply to the gas price

Overrides

BaseEthersClient.constructor

Defined in

staking.ts:119

Properties

escrowFactoryContract

• escrowFactoryContract: EscrowFactory

Defined in

staking.ts:109

---

gasPriceMultiplier

• Protected Optional gasPriceMultiplier: number

Inherited from

BaseEthersClient.gasPriceMultiplier

Defined in

base.ts:14

---

networkData

• networkData: NetworkData

Inherited from

BaseEthersClient.networkData

Defined in

base.ts:15

---

rewardPoolContract

• rewardPoolContract: RewardPool

Defined in

staking.ts:110

---

signerOrProvider

• Protected signerOrProvider: Signer | Provider

Inherited from

BaseEthersClient.signerOrProvider

Defined in

base.ts:13

---

stakingContract

• stakingContract: Staking

Defined in

staking.ts:108

---

tokenContract

• tokenContract: HMToken

Defined in

staking.ts:107

Methods

allocate

▸ allocate(escrowAddress, amount): Promise<void>

This function allocates a portion of the staked tokens to a specific escrow.

Must have tokens staked

Parameters

Name	Type	Description
escrowAddress	string	Address of the escrow contract to allocate in.
amount	BigNumber	Amount in WEI of tokens to allocate.

Returns

Promise<void>

Returns void if successful. Throws error if any.

Code example

import { ethers, Wallet, providers } from 'ethers';
import { StakingClient } from '@human-protocol/sdk';

const rpcUrl = 'YOUR_RPC_URL';
const privateKey = 'YOUR_PRIVATE_KEY'

const provider = new providers.JsonRpcProvider(rpcUrl);
const signer = new Wallet(privateKey, provider);
const stakingClient = await StakingClient.build(signer);

const amount = ethers.utils.parseUnits(5, 'ether'); //convert from ETH to WEI
await stakingClient.allocate('0x62dD51230A30401C455c8398d06F85e4EaB6309f', amount);

Defined in

staking.ts:461

---

approveStake

▸ approveStake(amount): Promise<void>

This function approves the staking contract to transfer a specified amount of tokens when the user stakes. It increases the allowance for the staking contract.

Parameters

Name	Type	Description
amount	BigNumber	Amount in WEI of tokens to approve for stake.

Returns

Promise<void>

Returns void if successful. Throws error if any.

Code example

import { ethers, Wallet, providers } from 'ethers';
import { StakingClient } from '@human-protocol/sdk';

const rpcUrl = 'YOUR_RPC_URL';
const privateKey = 'YOUR_PRIVATE_KEY'

const provider = new providers.JsonRpcProvider(rpcUrl);
const signer = new Wallet(privateKey, provider);
const stakingClient = await StakingClient.build(signer);

const amount = ethers.utils.parseUnits(5, 'ether'); //convert from ETH to WEI
await stakingClient.approveStake(amount);

Defined in

staking.ts:222

---

checkValidEscrow

▸ Private checkValidEscrow(escrowAddress): Promise<void>

Check if escrow exists

Parameters

Name	Type	Description
escrowAddress	string	Escrow address to check against

Returns

Promise<void>

Defined in

staking.ts:187

---

closeAllocation

▸ closeAllocation(escrowAddress): Promise<void>

This function drops the allocation from a specific escrow.

The escrow must have allocation The escrow must be cancelled or completed.

Parameters

Name	Type	Description
escrowAddress	string	Address of the escrow contract to close allocation from.

Returns

Promise<void>

Returns void if successful. Throws error if any.

Code example

import { Wallet, providers } from 'ethers';
import { StakingClient } from '@human-protocol/sdk';

const rpcUrl = 'YOUR_RPC_URL';
const privateKey = 'YOUR_PRIVATE_KEY'

const provider = new providers.JsonRpcProvider(rpcUrl);
const signer = new Wallet(privateKey, provider);
const stakingClient = await StakingClient.build(signer);

await stakingClient.closeAllocation('0x62dD51230A30401C455c8398d06F85e4EaB6309f');

Defined in

staking.ts:512

---

distributeReward

▸ distributeReward(escrowAddress): Promise<void>

This function drops the allocation from a specific escrow.

The escrow must have rewards added

Parameters

Name	Type	Description
escrowAddress	string	Escrow address from which rewards are distributed.

Returns

Promise<void>

Returns void if successful. Throws error if any.

Code example

import { Wallet, providers } from 'ethers';
import { StakingClient } from '@human-protocol/sdk';

const rpcUrl = 'YOUR_RPC_URL';
const privateKey = 'YOUR_PRIVATE_KEY'

const provider = new providers.JsonRpcProvider(rpcUrl);
const signer = new Wallet(privateKey, provider);
const stakingClient = await StakingClient.build(signer);

await stakingClient.distributeReward('0x62dD51230A30401C455c8398d06F85e4EaB6309f');

Defined in

staking.ts:551

---

gasPriceOptions

▸ Protected gasPriceOptions(): Promise<Partial<Overrides>>

Adjust the gas price, and return as an option to be passed to a transaction

Returns

Promise<Partial<Overrides>>

Returns the gas price options

Inherited from

BaseEthersClient.gasPriceOptions

Defined in

base.ts:39

---

getAllocation

▸ getAllocation(escrowAddress): Promise<IAllocation>

This function returns information about the allocation of the specified escrow.

Parameters

Name	Type	Description
escrowAddress	string	Escrow address from which we want to get allocation information.

Returns

Promise<IAllocation>

Returns allocation info if exists.

Code example

import { StakingClient } from '@human-protocol/sdk';
import { providers } from 'ethers';

const rpcUrl = 'YOUR_RPC_URL';

const provider = new providers.JsonRpcProvider(rpcUrl);
const stakingClient = await StakingClient.build(provider);

const allocationInfo = await stakingClient.getAllocation('0x62dD51230A30401C455c8398d06F85e4EaB6309f');

Defined in

staking.ts:659

---

getLeader

▸ getLeader(address): Promise<ILeader>

This function returns all the leader details of the protocol.

Parameters

Name	Type
address	string

Returns

Promise<ILeader>

Returns an array with all the leader details.

Code example

import { StakingClient } from '@human-protocol/sdk';
import { providers } from 'ethers';

const rpcUrl = 'YOUR_RPC_URL';

const provider = new providers.JsonRpcProvider(rpcUrl);
const stakingClient = await StakingClient.build(provider);

const leaders = await stakingClient.getLeaders();

Defined in

staking.ts:585

---

getLeaders

▸ getLeaders(filter?): Promise<ILeader[]>

This function returns the leader data for the given address.

Parameters

Name	Type
filter	ILeadersFilter

Returns

Promise<ILeader[]>

Returns the leader details.

Code example

import { StakingClient } from '@human-protocol/sdk';
import { providers } from 'ethers';

const rpcUrl = 'YOUR_RPC_URL';

const provider = new providers.JsonRpcProvider(rpcUrl);
const stakingClient = await StakingClient.build(provider);

const leader = await stakingClient.getLeader('0x62dD51230A30401C455c8398d06F85e4EaB6309f');

Defined in

staking.ts:624

---

getRewards

▸ getRewards(slasherAddress): Promise<IReward[]>

This function returns information about the rewards for a given slasher address.

Parameters

Name	Type	Description
slasherAddress	string	Slasher address.

Returns

Promise<IReward[]>

Returns an array of Reward objects that contain the rewards earned by the user through slashing other users.

Code example

import { StakingClient } from '@human-protocol/sdk';
import { providers } from 'ethers';

const rpcUrl = 'YOUR_RPC_URL';

const provider = new providers.JsonRpcProvider(rpcUrl);
const stakingClient = await StakingClient.build(provider);

const rewards = await stakingClient.getRewards('0x62dD51230A30401C455c8398d06F85e4EaB6309f');

Defined in

staking.ts:691

---

slash

▸ slash(slasher, staker, escrowAddress, amount): Promise<void>

This function reduces the allocated amount by an staker in an escrow and transfers those tokens to the reward pool. This allows the slasher to claim them later.

Parameters

Name	Type	Description
slasher	string	Wallet address from who requested the slash
staker	string	Wallet address from who is going to be slashed
escrowAddress	string	Address of the escrow which allocation will be slashed
amount	BigNumber	Amount in WEI of tokens to unstake.

Returns

Promise<void>

Returns void if successful. Throws error if any.

Code example

import { ethers, Wallet, providers } from 'ethers';
import { StakingClient } from '@human-protocol/sdk';

const rpcUrl = 'YOUR_RPC_URL';
const privateKey = 'YOUR_PRIVATE_KEY'

const provider = new providers.JsonRpcProvider(rpcUrl);
const signer = new Wallet(privateKey, provider);
const stakingClient = await StakingClient.build(signer);

const amount = ethers.utils.parseUnits(5, 'ether'); //convert from ETH to WEI
await stakingClient.slash('0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266', '0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266', '0x62dD51230A30401C455c8398d06F85e4EaB6309f', amount);

Defined in

staking.ts:398

---

stake

▸ stake(amount): Promise<void>

This function stakes a specified amount of tokens on a specific network.

approveStake must be called before

Parameters

Name	Type	Description
amount	BigNumber	Amount in WEI of tokens to stake.

Returns

Promise<void>

Returns void if successful. Throws error if any.

Code example

import { ethers, Wallet, providers } from 'ethers';
import { StakingClient } from '@human-protocol/sdk';

const rpcUrl = 'YOUR_RPC_URL';
const privateKey = 'YOUR_PRIVATE_KEY'

const provider = new providers.JsonRpcProvider(rpcUrl);
const signer = new Wallet(privateKey, provider);
const stakingClient = await StakingClient.build(signer);

const amount = ethers.utils.parseUnits(5, 'ether'); //convert from ETH to WEI
await stakingClient.approveStake(amount); // if it was already approved before, this is not necessary
await stakingClient.approveStake(amount);

Defined in

staking.ts:269

---

unstake

▸ unstake(amount): Promise<void>

This function unstakes tokens from staking contract. The unstaked tokens stay locked for a period of time.

Must have tokens available to unstake

Parameters

Name	Type	Description
amount	BigNumber	Amount in WEI of tokens to unstake.

Returns

Promise<void>

Returns void if successful. Throws error if any.

Code example

import { ethers, Wallet, providers } from 'ethers';
import { StakingClient } from '@human-protocol/sdk';

const rpcUrl = 'YOUR_RPC_URL';
const privateKey = 'YOUR_PRIVATE_KEY'

const provider = new providers.JsonRpcProvider(rpcUrl);
const signer = new Wallet(privateKey, provider);
const stakingClient = await StakingClient.build(signer);

const amount = ethers.utils.parseUnits(5, 'ether'); //convert from ETH to WEI
await stakingClient.unstake(amount);

Defined in

staking.ts:315

---

withdraw

▸ withdraw(): Promise<void>

This function withdraws unstaked and non locked tokens form staking contract to the user wallet.

Must have tokens available to withdraw

Returns

Promise<void>

Returns void if successful. Throws error if any.

Code example

import { Wallet, providers } from 'ethers';
import { StakingClient } from '@human-protocol/sdk';

const rpcUrl = 'YOUR_RPC_URL';
const privateKey = 'YOUR_PRIVATE_KEY'

const provider = new providers.JsonRpcProvider(rpcUrl);
const signer = new Wallet(privateKey, provider);
const stakingClient = await StakingClient.build(signer);

await stakingClient.withdraw();

Defined in

staking.ts:359

---

build

▸ Static build(signerOrProvider, gasPriceMultiplier?): Promise<StakingClient>

Creates an instance of StakingClient from a Signer or Provider.

Parameters

Name	Type	Description
signerOrProvider	Signer | Provider	The Signer or Provider object to interact with the Ethereum network
gasPriceMultiplier?	number	The multiplier to apply to the gas price

Returns

Promise<StakingClient>

• An instance of StakingClient

Throws

• Thrown if the provider does not exist for the provided Signer

Throws

• Thrown if the network's chainId is not supported

Defined in

staking.ts:157