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 runner. To use this client, it is recommended to initialize it using the static build method.

static async build(runner: ContractRunner);

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
• networkData
• rewardPoolContract
• runner
• stakingContract
• tokenContract

Methods

• allocate
• approveStake
• checkValidEscrow
• closeAllocation
• distributeReward
• getAllocation
• slash
• stake
• unstake
• withdraw
• build

Constructors

constructor

• new StakingClient(runner, networkData): StakingClient

StakingClient constructor

Parameters

Name	Type	Description
runner	ContractRunner	The Runner object to interact with the Ethereum network
networkData	NetworkData	-

Returns

StakingClient

Overrides

BaseEthersClient.constructor

Defined in

staking.ts:111

Properties

escrowFactoryContract

• escrowFactoryContract: EscrowFactory

Defined in

staking.ts:102

---

networkData

• networkData: NetworkData

Inherited from

BaseEthersClient.networkData

Defined in

base.ts:12

---

rewardPoolContract

• rewardPoolContract: RewardPool

Defined in

staking.ts:103

---

runner

• Protected runner: ContractRunner

Inherited from

BaseEthersClient.runner

Defined in

base.ts:11

---

stakingContract

• stakingContract: Staking

Defined in

staking.ts:101

---

tokenContract

• tokenContract: HMToken

Defined in

staking.ts:100

Methods

allocate

▸ allocate(escrowAddress, amount, txOptions?): 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	bigint	Amount in WEI of tokens to allocate.
txOptions?	Overrides	Additional transaction parameters (optional, defaults to an empty object).

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

Defined in

staking.ts:458

---

approveStake

▸ approveStake(amount, txOptions?): 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	bigint	Amount in WEI of tokens to approve for stake.
txOptions?	Overrides	Additional transaction parameters (optional, defaults to an empty object).

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

Defined in

staking.ts:203

---

checkValidEscrow

▸ 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:167

---

closeAllocation

▸ closeAllocation(escrowAddress, txOptions?): 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.
txOptions?	Overrides	Additional transaction parameters (optional, defaults to an empty object).

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:511

---

distributeReward

▸ distributeReward(escrowAddress, txOptions?): 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.
txOptions?	Overrides	Additional transaction parameters (optional, defaults to an empty object).

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:554

---

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:591

---

slash

▸ slash(slasher, staker, escrowAddress, amount, txOptions?): 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	bigint	Amount in WEI of tokens to unstake.
txOptions?	Overrides	Additional transaction parameters (optional, defaults to an empty object).

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

Defined in

staking.ts:387

---

stake

▸ stake(amount, txOptions?): Promise<void>

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

approveStake must be called before

Parameters

Name	Type	Description
amount	bigint	Amount in WEI of tokens to stake.
txOptions?	Overrides	Additional transaction parameters (optional, defaults to an empty object).

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.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:258

---

unstake

▸ unstake(amount, txOptions?): 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	bigint	Amount in WEI of tokens to unstake.
txOptions?	Overrides	Additional transaction parameters (optional, defaults to an empty object).

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

Defined in

staking.ts:303

---

withdraw

▸ withdraw(txOptions?): Promise<void>

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

Must have tokens available to withdraw

Parameters

Name	Type	Description
txOptions?	Overrides	Additional transaction parameters (optional, defaults to an empty object).

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:349

---

build

▸ build(runner): Promise<StakingClient>

Creates an instance of StakingClient from a Runner.

Parameters

Name	Type	Description
runner	ContractRunner	The Runner object to interact with the Ethereum network

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:145