EscrowClient

/ / EscrowClient

Class: EscrowClient

Introduction

This client enables performing actions on Escrow contracts and obtaining 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): Promise<EscrowClient>;

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 to send transactions calling the contract functions.
Provider: when the user wants to use this model 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

The network information required to connect to the Escrow contract

Returns

Overrides

Defined in

Properties

networkData

Inherited from

Defined in

runner

protected runner: ContractRunner

Inherited from

Defined in

Methods

addTrustedHandlers()

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

This function adds an array of addresses to the trusted handlers list.

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, txId, forceComplete, 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.

txId

number

Transaction ID.

forceComplete

boolean = false

Indicates if remaining balance should be transferred to the escrow creator (optional, defaults to false).

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';
const txId = 1;

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

Defined in

cancel()

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

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

createBulkPayoutTransaction()

Creates a prepared transaction for bulk payout without immediately sending it.

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.

txId

number

Transaction ID.

forceComplete

boolean = false

Indicates if remaining balance should be transferred to the escrow creator (optional, defaults to false).

txOptions?

Overrides = {}

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

Returns

Returns object with raw transaction and signed transaction hash

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';
const txId = 1;

const rawTransaction = await escrowClient.createBulkPayoutTransaction('0x62dD51230A30401C455c8398d06F85e4EaB6309f', recipients, amounts, resultsUrl, resultsHash, txId);
console.log('Raw transaction:', rawTransaction);

const signedTransaction = await signer.signTransaction(rawTransaction);
console.log('Tx hash:', ethers.keccak256(signedTransaction));
(await signer.sendTransaction(rawTransaction)).wait();

#### Defined in

[escrow.ts:935](https://github.com/humanprotocol/human-protocol/blob/b190dc1831c2c96fe3d44fd63e915e54011e1ec8/packages/sdk/typescript/human-protocol-sdk/src/escrow.ts#L935)

***

### 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 payouts.

##### 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`\>

Returns the address of the escrow created.

**Code example**

> Need to have available stake.

```ts
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(provider);

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(provider);

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(provider);

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(provider);

const intermediateResultsUrl = 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(provider);

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(provider);

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(provider);

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(provider);

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(provider);

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(provider);

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

Defined in

getStatus()

This function returns the current status of the escrow.

Parameters

escrowAddress

string

Address of the escrow.

Returns

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(provider);

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(provider);

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

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('10'),
   reputationOracleFee: BigInt('10'),
   exchangeOracleFee: BigInt('10'),
   manifestUrl: 'http://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 escrowClient.storeResults('0x62dD51230A30401C455c8398d06F85e4EaB6309f', 'http://localhost/results.json', 'b5dad76bf6772c0f07fd5e048f6e75a5f86ee079');

Defined in

withdraw()

This function withdraws additional tokens in the escrow to the canceler.

Parameters

escrowAddress

string

Address of the escrow to withdraw.

tokenAddress

string

Address of the token to withdraw.

txOptions?

Overrides = {}

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

Returns

Returns the escrow withdrawal data including transaction hash and withdrawal 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.withdraw(
 '0x62dD51230A30401C455c8398d06F85e4EaB6309f',
 '0x0376D26246Eb35FF4F9924cF13E6C05fd0bD7Fb4'
);

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 3 months ago