EscrowClient

@human-protocol/sdk / Modules / escrow / EscrowClient

Class: EscrowClient

escrow.EscrowClient

Introduction

This client enables to perform actions on Escrow contracts and obtain 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 { EscrowClient } 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 escrowClient = await EscrowClient.build(signer);

Using Wagmi(frontend)

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

const { data: signer } = useSigner();
const escrowClient = await EscrowClient.build(signer);

Provider

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

const rpcUrl = 'YOUR_RPC_URL';

const provider = new providers.JsonRpcProvider(rpcUrl);
const escrowClient = await EscrowClient.build(provider);

Hierarchy

Table of contents

Constructors

Properties

Methods

Constructors

constructor

• new EscrowClient(signerOrProvider, networkData, gasPriceMultiplier?)

EscrowClient 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

escrow.ts:130

Properties

escrowFactoryContract

• Private escrowFactoryContract: EscrowFactory

Defined in

escrow.ts:121

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

signerOrProvider

• Protected signerOrProvider: Signer | Provider

Inherited from

BaseEthersClient.signerOrProvider

Defined in

base.ts:13

Methods

abort

▸ abort(escrowAddress): Promise<void>

This function cancels the specified escrow, sends the balance to the canceler and selfdestructs the escrow contract.

Parameters

Name
Type
Description

escrowAddress

string

Address of the escrow.

Returns

Promise<void>

Returns void if successful. Throws error if any.

Code example

Only Job Launcher or trusted handler can call it.

import { Wallet, providers } from 'ethers';
import { EscrowClient } 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 escrowClient = await EscrowClient.build(signer);

await escrowClient.abort('0x62dD51230A30401C455c8398d06F85e4EaB6309f');

Defined in

escrow.ts:835

addTrustedHandlers

▸ addTrustedHandlers(escrowAddress, trustedHandlers): Promise<void>

This function sets the status of an escrow to completed.

Parameters

Name
Type
Description

escrowAddress

string

Address of the escrow.

trustedHandlers

string[]

Array of addresses of trusted handlers to add.

Returns

Promise<void>

Returns void if successful. Throws error if any.

Code example

Only Job Launcher or trusted handler can call it.

import { Wallet, providers } from 'ethers';
import { EscrowClient } 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 escrowClient = await EscrowClient.build(signer);

const trustedHandlers = ['0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266', '0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266']
await escrowClient.addTrustedHandlers('0x62dD51230A30401C455c8398d06F85e4EaB6309f', trustedHandlers);

Defined in

escrow.ts:884

bulkPayOut

▸ bulkPayOut(escrowAddress, recipients, amounts, finalResultsUrl, finalResultsHash): Promise<void>

This function pays out the amounts specified to the workers and sets the URL of the final results file.

Parameters

Name
Type
Description

escrowAddress

string

Escrow address to payout.

recipients

string[]

Array of recipient addresses.

amounts

BigNumber[]

Array of amounts the recipients will receive.

finalResultsUrl

string

Final results file url.

finalResultsHash

string

Final results file hash.

Returns

Promise<void>

Returns void if successful. Throws error if any.

Code example

Only Reputation Oracle or a trusted handler can call it.

import { ethers, Wallet, providers } from 'ethers';
import { EscrowClient } 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 escrowClient = await EscrowClient.build(signer);

const recipients = ['0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266', '0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266'];
const amounts = [ethers.utils.parseUnits(5, 'ether'), ethers.utils.parseUnits(10, 'ether')];
const resultsUrl = 'http://localhost/results.json';
const resultsHash'b5dad76bf6772c0f07fd5e048f6e75a5f86ee079';

await escrowClient.bulkPayOut('0x62dD51230A30401C455c8398d06F85e4EaB6309f', recipients, amounts, resultsUrl, resultsHash);

Defined in

escrow.ts:655

cancel

▸ cancel(escrowAddress): Promise<EscrowCancel>

This function cancels the specified escrow and sends the balance to the canceler.

Parameters

Name
Type
Description

escrowAddress

string

Address of the escrow to cancel.

Returns

Promise<EscrowCancel>

Returns the escrow cancellation data including transaction hash and refunded amount. Throws error if any.

Code example

Only Job Launcher or a trusted handler can call it.

import { ethers, Wallet, providers } from 'ethers';
import { EscrowClient } 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 escrowClient = await EscrowClient.build(signer);

await escrowClient.cancel('0x62dD51230A30401C455c8398d06F85e4EaB6309f');

Defined in

escrow.ts:757

complete

▸ complete(escrowAddress): Promise<void>

This function sets the status of an escrow to completed.

Parameters

Name
Type
Description

escrowAddress

string

Address of the escrow.

Returns

Promise<void>

Returns void if successful. Throws error if any.

Code example

Only Recording Oracle or a trusted handler can call it.

import { Wallet, providers } from 'ethers';
import { EscrowClient } 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 escrowClient = await EscrowClient.build(signer);

await escrowClient.complete('0x62dD51230A30401C455c8398d06F85e4EaB6309f');

Defined in

escrow.ts:599

createAndSetupEscrow

▸ createAndSetupEscrow(tokenAddress, trustedHandlers, jobRequesterId, escrowConfig): Promise<string>

This function creates and sets up an escrow.

Parameters

Name
Type
Description

tokenAddress

string

Token address to use for pay outs.

trustedHandlers

string[]

Array of addresses that can perform actions on the contract.

jobRequesterId

string

Job Requester Id

escrowConfig

IEscrowConfig

Configuration object with escrow settings.

Returns

Promise<string>

Returns the address of the escrow created.

Code example

import { ethers, Wallet, providers } from 'ethers';
import { EscrowClient } 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 escrowClient = await EscrowClient.build(signer);

const tokenAddress = '0x0376D26246Eb35FF4F9924cF13E6C05fd0bD7Fb4';
const trustedHandlers = ['0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266', '0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266'];
const jobRequesterId = "job-requester-id";

const escrowConfig = {
   recordingOracle: '0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266',
   reputationOracle: '0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266',
   exchangeOracle: '0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266',
   recordingOracleFee: BigNumber.from('10'),
   reputationOracleFee: BigNumber.from('10'),
   exchangeOracleFee: BigNumber.from('10'),
   manifestUrl: 'htttp://localhost/manifest.json',
   manifestHash: 'b5dad76bf6772c0f07fd5e048f6e75a5f86ee079',
};

const escrowAddress = await escrowClient.createAndSetupEscrow(tokenAddress, trustedHandlers, jobRequesterId, escrowConfig);

Defined in

escrow.ts:427

createEscrow

▸ createEscrow(tokenAddress, trustedHandlers, jobRequesterId): Promise<string>

This function creates an escrow contract that uses the token passed to pay oracle fees and reward workers.

Parameters

Name
Type
Description

tokenAddress

string

Token address to use for pay outs.

trustedHandlers

string[]

Array of addresses that can perform actions on the contract.

jobRequesterId

string

Job Requester Id

Returns

Promise<string>

Return the address of the escrow created.

Code example

Need to have available stake.

import { Wallet, providers } from 'ethers';
import { EscrowClient } 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 escrowClient = await EscrowClient.build(signer);

const tokenAddress = '0x0376D26246Eb35FF4F9924cF13E6C05fd0bD7Fb4';
const trustedHandlers = ['0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266', '0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266'];
const jobRequesterId = "job-requester-id";
const escrowAddress = await escrowClient.createEscrow(tokenAddress, trustedHandlers, jobRequesterId);

Defined in

escrow.ts:222

fund

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

This function adds funds of the chosen token to the escrow.

Parameters

Name
Type
Description

escrowAddress

string

Address of the escrow to fund.

amount

BigNumber

Amount to be added as funds.

Returns

Promise<void>

Returns void if successful. Throws error if any.

Code example

import { ethers, Wallet, providers } from 'ethers';
import { EscrowClient } 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 escrowClient = await EscrowClient.build(signer);

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

Defined in

escrow.ts:474

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

getBalance

▸ getBalance(escrowAddress): Promise<BigNumber>

This function returns the balance for a specified escrow address.

Parameters

Name
Type
Description

escrowAddress

string

Address of the escrow.

Returns

Promise<BigNumber>

Balance of the escrow in the token used to fund it.

Code example

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

const rpcUrl = 'YOUR_RPC_URL';

const provider = new providers.JsonRpcProvider(rpcUrl);
const escrowClient = await EscrowClient.build(signer);

const balance = await escrowClient.getBalance('0x62dD51230A30401C455c8398d06F85e4EaB6309f');

Defined in

escrow.ts:938

getEscrowContract

▸ Private getEscrowContract(escrowAddress): Escrow

Connects to the escrow contract

Parameters

Name
Type
Description

escrowAddress

string

Escrow address to connect to

Returns

Escrow

Defined in

escrow.ts:183

getExchangeOracleAddress

▸ getExchangeOracleAddress(escrowAddress): Promise<string>

This function returns the exchange oracle address for a given escrow.

Parameters

Name
Type
Description

escrowAddress

string

Address of the escrow.

Returns

Promise<string>

Address of the Exchange Oracle.

Code example

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

const rpcUrl = 'YOUR_RPC_URL';

const provider = new providers.JsonRpcProvider(rpcUrl);
const escrowClient = await EscrowClient.build(signer);

const oracleAddress = await escrowClient.getExchangeOracleAddress('0x62dD51230A30401C455c8398d06F85e4EaB6309f');

Defined in

escrow.ts:1318

getFactoryAddress

▸ getFactoryAddress(escrowAddress): Promise<string>

This function returns the escrow factory address for a given escrow.

Parameters

Name
Type
Description

escrowAddress

string

Address of the escrow.

Returns

Promise<string>

Address of the escrow factory.

Code example

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

const rpcUrl = 'YOUR_RPC_URL';

const provider = new providers.JsonRpcProvider(rpcUrl);
const escrowClient = await EscrowClient.build(signer);

const factoryAddress = await escrowClient.getFactoryAddress('0x62dD51230A30401C455c8398d06F85e4EaB6309f');

Defined in

escrow.ts:1356

getIntermediateResultsUrl

▸ getIntermediateResultsUrl(escrowAddress): Promise<string>

This function returns the intermediate results file URL.

Parameters

Name
Type
Description

escrowAddress

string

Address of the escrow.

Returns

Promise<string>

Url of the file that store results from Recording Oracle.

Code example

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

const rpcUrl = 'YOUR_RPC_URL';

const provider = new providers.JsonRpcProvider(rpcUrl);
const escrowClient = await EscrowClient.build(signer);

const intemediateResultsUrl = await escrowClient.getIntermediateResultsUrl('0x62dD51230A30401C455c8398d06F85e4EaB6309f');

Defined in

escrow.ts:1090

getJobLauncherAddress

▸ getJobLauncherAddress(escrowAddress): Promise<string>

This function returns the job launcher address for a given escrow.

Parameters

Name
Type
Description

escrowAddress

string

Address of the escrow.

Returns

Promise<string>

Address of the Job Launcher.

Code example

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

const rpcUrl = 'YOUR_RPC_URL';

const provider = new providers.JsonRpcProvider(rpcUrl);
const escrowClient = await EscrowClient.build(signer);

const jobLauncherAddress = await escrowClient.getJobLauncherAddress('0x62dD51230A30401C455c8398d06F85e4EaB6309f');

Defined in

escrow.ts:1242

getManifestHash

▸ getManifestHash(escrowAddress): Promise<string>

This function returns the manifest file hash.

Parameters

Name
Type
Description

escrowAddress

string

Address of the escrow.

Returns

Promise<string>

Hash of the manifest file content.

Code example

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

const rpcUrl = 'YOUR_RPC_URL';

const provider = new providers.JsonRpcProvider(rpcUrl);
const escrowClient = await EscrowClient.build(signer);

const manifestHash = await escrowClient.getManifestHash('0x62dD51230A30401C455c8398d06F85e4EaB6309f');

Defined in

escrow.ts:976

getManifestUrl

▸ getManifestUrl(escrowAddress): Promise<string>

This function returns the manifest file URL.

Parameters

Name
Type
Description

escrowAddress

string

Address of the escrow.

Returns

Promise<string>

Url of the manifest.

Code example

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

const rpcUrl = 'YOUR_RPC_URL';

const provider = new providers.JsonRpcProvider(rpcUrl);
const escrowClient = await EscrowClient.build(signer);

const manifestUrl = await escrowClient.getManifestUrl('0x62dD51230A30401C455c8398d06F85e4EaB6309f');

Defined in

escrow.ts:1014

getRecordingOracleAddress

▸ getRecordingOracleAddress(escrowAddress): Promise<string>

This function returns the recording oracle address for a given escrow.

Parameters

Name
Type
Description

escrowAddress

string

Address of the escrow.

Returns

Promise<string>

Address of the Recording Oracle.

Code example

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

const rpcUrl = 'YOUR_RPC_URL';

const provider = new providers.JsonRpcProvider(rpcUrl);
const escrowClient = await EscrowClient.build(signer);

const oracleAddress = await escrowClient.getRecordingOracleAddress('0x62dD51230A30401C455c8398d06F85e4EaB6309f');

Defined in

escrow.ts:1204

getReputationOracleAddress

▸ getReputationOracleAddress(escrowAddress): Promise<string>

This function returns the reputation oracle address for a given escrow.

Parameters

Name
Type
Description

escrowAddress

string

Address of the escrow.

Returns

Promise<string>

Address of the Reputation Oracle.

Code example

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

const rpcUrl = 'YOUR_RPC_URL';

const provider = new providers.JsonRpcProvider(rpcUrl);
const escrowClient = await EscrowClient.build(signer);

const oracleAddress = await escrowClient.getReputationOracleAddress('0x62dD51230A30401C455c8398d06F85e4EaB6309f');

Defined in

escrow.ts:1280

getResultsUrl

▸ getResultsUrl(escrowAddress): Promise<string>

This function returns the results file URL.

Parameters

Name
Type
Description

escrowAddress

string

Address of the escrow.

Returns

Promise<string>

Results file url.

Code example

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

const rpcUrl = 'YOUR_RPC_URL';

const provider = new providers.JsonRpcProvider(rpcUrl);
const escrowClient = await EscrowClient.build(signer);

const resultsUrl = await escrowClient.getResultsUrl('0x62dD51230A30401C455c8398d06F85e4EaB6309f');

Defined in

escrow.ts:1052

getStatus

▸ getStatus(escrowAddress): Promise<EscrowStatus>

This function returns the current status of the escrow.

Parameters

Name
Type
Description

escrowAddress

string

Address of the escrow.

Returns

Promise<EscrowStatus>

Current status of the escrow.

Code example

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

const rpcUrl = 'YOUR_RPC_URL';

const provider = new providers.JsonRpcProvider(rpcUrl);
const escrowClient = await EscrowClient.build(signer);

const status = await escrowClient.getStatus('0x62dD51230A30401C455c8398d06F85e4EaB6309f');

Defined in

escrow.ts:1166

getTokenAddress

▸ getTokenAddress(escrowAddress): Promise<string>

This function returns the token address used for funding the escrow.

Parameters

Name
Type
Description

escrowAddress

string

Address of the escrow.

Returns

Promise<string>

Address of the token used to fund the escrow.

Code example

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

const rpcUrl = 'YOUR_RPC_URL';

const provider = new providers.JsonRpcProvider(rpcUrl);
const escrowClient = await EscrowClient.build(signer);

const tokenAddress = await escrowClient.getTokenAddress('0x62dD51230A30401C455c8398d06F85e4EaB6309f');

Defined in

escrow.ts:1128

setup

▸ setup(escrowAddress, escrowConfig): Promise<void>

This function sets up the parameters of the escrow.

Parameters

Name
Type
Description

escrowAddress

string

Address of the escrow to set up.

escrowConfig

IEscrowConfig

Escrow configuration parameters.

Returns

Promise<void>

Returns void if successful. Throws error if any.

Code example

Only Job Launcher or a trusted handler can call it.

import { Wallet, providers } from 'ethers';
import { EscrowClient } 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 escrowClient = await EscrowClient.build(signer);

const escrowAddress = '0x62dD51230A30401C455c8398d06F85e4EaB6309f';
const escrowConfig = {
   recordingOracle: '0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266',
   reputationOracle: '0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266',
   exchangeOracle: '0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266',
   recordingOracleFee: BigNumber.from('10'),
   reputationOracleFee: BigNumber.from('10'),
   exchangeOracleFee: BigNumber.from('10'),
   manifestUrl: 'htttp://localhost/manifest.json',
   manifestHash: 'b5dad76bf6772c0f07fd5e048f6e75a5f86ee079',
};
await escrowClient.setup(escrowAddress, escrowConfig);

Defined in

escrow.ts:301

storeResults

▸ storeResults(escrowAddress, url, hash): Promise<void>

This function stores the results url and hash.

Parameters

Name
Type
Description

escrowAddress

string

Address of the escrow.

url

string

Results file url.

hash

string

Results file hash.

Returns

Promise<void>

Returns void if successful. Throws error if any.

Code example

Only Recording Oracle or a trusted handler can call it.

import { ethers, Wallet, providers } from 'ethers';
import { EscrowClient } 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 escrowClient = await EscrowClient.build(signer);

await storeResults.storeResults('0x62dD51230A30401C455c8398d06F85e4EaB6309f', 'http://localhost/results.json', 'b5dad76bf6772c0f07fd5e048f6e75a5f86ee079');

Defined in

escrow.ts:535

build

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

Creates an instance of EscrowClient 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<EscrowClient>

An instance of EscrowClient

Throws

Thrown if the provider does not exist for the provided Signer

Throws

Thrown if the network's chainId is not supported

Defined in

escrow.ts:153

Last updated