EscrowClient

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Class: 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 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 { 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);

Extends

Constructors

new EscrowClient()

EscrowClient constructor

Parameters

• runner: ContractRunner

The Runner object to interact with the Ethereum network

• networkData: NetworkData

Returns

Overrides

Defined in

Properties

networkData

networkData: NetworkData

Inherited from

Defined in

runner

protected runner: ContractRunner

Inherited from

Defined in

Methods

abort()

abort(escrowAddress, txOptions?): Promise<void>

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

Parameters

• escrowAddress: string

Address of the escrow.

• txOptions?: Overrides = {}

Additional transaction parameters (optional, defaults to an empty object).

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

addTrustedHandlers()

addTrustedHandlers(escrowAddress, trustedHandlers, txOptions?): Promise<void>

This function sets the status of an escrow to completed.

Parameters

• escrowAddress: string

Address of the escrow.

• trustedHandlers: string[]

Array of addresses of trusted handlers to add.

• txOptions?: Overrides = {}

Additional transaction parameters (optional, defaults to an empty object).

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

bulkPayOut()

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

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

Parameters

• escrowAddress: string

Escrow address to payout.

• recipients: string[]

Array of recipient addresses.

• amounts: bigint[]

Array of amounts the recipients will receive.

• finalResultsUrl: string

Final results file url.

• finalResultsHash: string

Final results file hash.

• txOptions?: Overrides = {}

Additional transaction parameters (optional, defaults to an empty object).

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.parseUnits(5, 'ether'), ethers.parseUnits(10, 'ether')];
const resultsUrl = 'http://localhost/results.json';
const resultsHash'b5dad76bf6772c0f07fd5e048f6e75a5f86ee079';

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

Defined in

cancel()

cancel(escrowAddress, txOptions?): Promise<EscrowCancel>

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

Parameters

• escrowAddress: string

Address of the escrow to cancel.

• txOptions?: Overrides = {}

Additional transaction parameters (optional, defaults to an empty object).

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

complete()

complete(escrowAddress, txOptions?): Promise<void>

This function sets the status of an escrow to completed.

Parameters

• escrowAddress: string

Address of the escrow.

• txOptions?: Overrides = {}

Additional transaction parameters (optional, defaults to an empty object).

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

createAndSetupEscrow()

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

This function creates and sets up an escrow.

Parameters

• 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: bigint.from('10'),
   reputationOracleFee: bigint.from('10'),
   exchangeOracleFee: bigint.from('10'),
   manifestUrl: 'htttp://localhost/manifest.json',
   manifestHash: 'b5dad76bf6772c0f07fd5e048f6e75a5f86ee079',
};

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

Defined in

createEscrow()

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

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

Parameters

• 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

• txOptions?: Overrides = {}

Additional transaction parameters (optional, defaults to an empty object).

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

fund()

fund(escrowAddress, amount, txOptions?): Promise<void>

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

Parameters

• escrowAddress: string

Address of the escrow to fund.

• amount: bigint

Amount to be added as funds.

• 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 { 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.parseUnits(5, 'ether'); //convert from ETH to WEI
await escrowClient.fund('0x62dD51230A30401C455c8398d06F85e4EaB6309f', amount);

Defined in

getBalance()

getBalance(escrowAddress): Promise<bigint>

This function returns the balance for a specified escrow address.

Parameters

• escrowAddress: string

Address of the escrow.

Returns

Promise<bigint>

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

getExchangeOracleAddress()

getExchangeOracleAddress(escrowAddress): Promise<string>

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

Parameters

• 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

getFactoryAddress()

getFactoryAddress(escrowAddress): Promise<string>

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

Parameters

• 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

getIntermediateResultsUrl()

getIntermediateResultsUrl(escrowAddress): Promise<string>

This function returns the intermediate results file URL.

Parameters

• 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

getJobLauncherAddress()

getJobLauncherAddress(escrowAddress): Promise<string>

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

Parameters

• 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

getManifestHash()

getManifestHash(escrowAddress): Promise<string>

This function returns the manifest file hash.

Parameters

• 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

getManifestUrl()

getManifestUrl(escrowAddress): Promise<string>

This function returns the manifest file URL.

Parameters

• 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

getRecordingOracleAddress()

getRecordingOracleAddress(escrowAddress): Promise<string>

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

Parameters

• 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

getReputationOracleAddress()

getReputationOracleAddress(escrowAddress): Promise<string>

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

Parameters

• 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

getResultsUrl()

getResultsUrl(escrowAddress): Promise<string>

This function returns the results file URL.

Parameters

• 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

getStatus()

getStatus(escrowAddress): Promise<EscrowStatus>

This function returns the current status of the escrow.

Parameters

• 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

getTokenAddress()

getTokenAddress(escrowAddress): Promise<string>

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

Parameters

• 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

setup()

setup(escrowAddress, escrowConfig, txOptions?): Promise<void>

This function sets up the parameters of the escrow.

Parameters

• escrowAddress: string

Address of the escrow to set up.

• escrowConfig: IEscrowConfig

Escrow configuration parameters.

• txOptions?: Overrides = {}

Additional transaction parameters (optional, defaults to an empty object).

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: bigint.from('10'),
   reputationOracleFee: bigint.from('10'),
   exchangeOracleFee: bigint.from('10'),
   manifestUrl: 'htttp://localhost/manifest.json',
   manifestHash: 'b5dad76bf6772c0f07fd5e048f6e75a5f86ee079',
};
await escrowClient.setup(escrowAddress, escrowConfig);

Defined in

storeResults()

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

This function stores the results url and hash.

Parameters

• escrowAddress: string

Address of the escrow.

• url: string

Results file url.

• hash: string

Results file hash.

• txOptions?: Overrides = {}

Additional transaction parameters (optional, defaults to an empty object).

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

build()

Creates an instance of EscrowClient from a Runner.

Parameters

• runner: ContractRunner

The Runner object to interact with the Ethereum network

Returns

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

Last updated 8 months ago