Web3Provider - ZKsync SDK Docs

The Web3Provider is an extension of the Provider class specifically designed for use in browser environments and integration with browser wallets (e.g., MetaMask, WalletConnect). It supports RPC endpoints within the zks namespace.

`constructor`

Initializes a new instance of the Web3Provider class.

Inputs

Parameter	Type	Description
`provider`	`ExternalProvider`	The provider injected from the browser (e.g., MetaMask's `window.ethereum`).
`network?`	`ethers.providers.Networkish`	Optional. The network name, chain ID, or object with network details.

constructor(provider: ExternalProvider, network?: ethers.providers.Networkish)

Example

import { Web3Provider } from "zksync-ethers";
 
const provider = new Web3Provider(window.ethereum);

`estimateFee`

Returns an estimated fee for the requested transaction.

Inputs

Parameter	Type	Description
`transaction`	`TransactionRequest`	The transaction request.

override async estimateFee(transaction: TransactionRequest): Promise<Fee>

Example

import { Web3Provider, utils } from "zksync-ethers";
 
const provider = new Web3Provider(window.ethereum);
const fee = await provider.estimateFee({
  from: "0x36615Cf349d7F6344891B1e7CA7C72883F5dc049",
  to: "0xa61464658AfeAf65CccaaFD3
 
a512b69A83B77618",
  value: BigNumber.from(7_000_000_000).toHexString(),
});
console.log(`Fee: ${utils.toJSON(fee)}`);

`estimateGasL1`

Estimates the amount of gas required to submit a transaction from L1 to L2.

Inputs

Parameter	Type	Description
`transaction`	`TransactionRequest`	The transaction request.

override async estimateGasL1(transaction: TransactionRequest): Promise<BigNumber>

Example

import { Web3Provider } from "zksync-ethers";
 
const provider = new Web3Provider(window.ethereum);
const gasL1 = await provider.estimateGasL1({
  from: "0x36615Cf349d7F6344891B1e7CA7C72883F5dc049",
  to: await provider.getMainContractAddress(),
  value: 7_000_000_000,
  customData: {
    gasPerPubdata: 800,
  },
});
console.log(`L1 gas: ${gasL1}`);

`getAllAccountBalances`

Returns all balances for confirmed tokens given by an account address.

Inputs

Parameter	Type	Description
`address`	`Address`	The account address.

override async getAllAccountBalances(address: Address): Promise<BalancesMap>

Example

import { Web3Provider, utils } from "zksync-ethers";
 
const provider = new Web3Provider(window.ethereum);
const balances = await provider.getAllAccountBalances("0x36615Cf349d7F6344891B1e7CA7C72883F5dc049");
console.log(`All balances: ${utils.toJSON(balances)}`);

`getBalance`

Returns the account balance for the specified address, blockTag, and tokenAddress.

Inputs

Parameter	Type	Description
`address`	`Address`	The account address.
`blockTag?`	`BlockTag`	Optional. The block tag for balance query.
`tokenAddress?`	`Address`	Optional. The token address.

override async getBalance(address: Address, blockTag?: BlockTag, tokenAddress?: Address): Promise<BigNumber>

Example

import { Web3Provider } from "zksync-ethers";
 
const provider = new Web3Provider(window.ethereum);
const account = "0x36615Cf349d7F6344891B1e7CA7C72883F5dc049";
const tokenAddress = "0x927488F48ffbc32112F1fF721759649A89721F8F"; // Crown token which can be minted for free
console.log(`ETH balance: ${await provider.getBalance(account)}`);
console.log(`Token balance: ${await provider.getBalance(account, "latest", tokenAddress)}`);

`getBaseTokenContractAddress`

Returns the L1 base token address.

override async getBaseTokenContractAddress(): Promise<Address>

Example

import { Web3Provider } from "zksync-ethers";
 
const provider = new Web3Provider(window.ethereum);
console.log(`Base token: ${await provider.getBaseTokenContractAddress()}`);

`getBlock`

Returns the block for the specified blockHashOrBlockTag.

Inputs

Parameter	Type	Description
`blockHashOrBlockTag`	`BlockTag` or `string`	The block hash or tag.

override async getBlock(blockHashOrBlockTag: BlockTag | string | Promise<BlockTag | string>): Promise<Block>

Example

import { Web3Provider, utils } from "zksync-ethers";
 
const provider = new Web3Provider(window.ethereum);
console.log(`Block: ${utils.toJSON(await provider.getBlock("latest", true))}`);

`getBlockDetails`

Returns additional ZKsync-specific information about the L2 block.

Inputs

Parameter	Type	Description
`number`	`number`	The block number.

override async getBlockDetails(number: number): Promise<BlockDetails>

Example

import { Web3Provider, utils } from "zksync-ethers";
 
const provider = new Web3
 
Provider(window.ethereum);
console.log(`Block details: ${utils.toJSON(await provider.getBlockDetails(90_000))}`);

`getBlockWithTransactions`

Returns the block for the specified blockHashOrBlockTag, including all transactions.

Inputs

Parameter	Type	Description
`blockHashOrBlockTag`	`BlockTag` or `string`	The block hash or tag.

override async getBlockWithTransactions(blockHashOrBlockTag: BlockTag | string | Promise<BlockTag | string>): Promise<BlockWithTransactions>

Example

import { Web3Provider, utils } from "zksync-ethers";
 
const provider = new Web3Provider(window.ethereum);
console.log(`Block: ${utils.toJSON(await provider.getBlockWithTransactions("latest", true))}`);

`getBridgehubContractAddress`

Returns the Bridgehub smart contract address.

override async getBridgehubContractAddress(): Promise<Address>

Example

import { Web3Provider } from "zksync-ethers";
 
const provider = new Web3Provider(window.ethereum);
console.log(`Bridgehub: ${await provider.getBridgehubContractAddress()}`);

`getBytecodeByHash`

Returns bytecode of a contract given by its hash.

Inputs

Parameter	Type	Description
`bytecodeHash`	`BytesLike`	The bytecode hash.

override async getBytecodeByHash(bytecodeHash: BytesLike): Promise<Uint8Array>

Example

import { Web3Provider } from "zksync-ethers";
 
// Bytecode hash can be computed by following these steps:
// const testnetPaymasterBytecode = await provider.getCode(await provider.getTestnetPaymasterAddress());
// const testnetPaymasterBytecodeHash = ethers.utils.hexlify(utils.hashBytecode(testnetPaymasterBytecode));
 
const testnetPaymasterBytecodeHash = "0x010000f16d2b10ddeb1c32f2c9d222eb1aea0f638ec94a81d4e916c627720e30";
 
const provider = new Web3Provider(window.ethereum);
console.log(`Bytecode: ${await provider.getBytecodeByHash(testnetPaymasterBytecodeHash)}`);

`getConfirmedTokens`

Returns confirmed tokens. Confirmed token is any token bridged to ZKsync Era via the official bridge.

Inputs

Parameter	Type	Description
`start?`	`number`	The token ID from which to start. Default is 0.
`limit?`	`number`	The maximum number of tokens to list. Default is 255.

override async getConfirmedTokens(start?: number, limit?: number): Promise<Token[]>

Example

import { Web3Provider, utils } from "zksync-ethers";
 
const provider = new Web3Provider(window.ethereum);
const tokens = await provider.getConfirmedTokens();
console.log(`Confirmed tokens: ${utils.toJSON(tokens)}`);

`getDefaultBridgeAddresses`

Returns the addresses of the default ZKsync Era bridge contracts on both L1 and L2.

override async getDefaultBridgeAddresses(): Promise<{ erc20L1: string; erc20L2: string; wethL1: string; wethL2: string; sharedL1: string; sharedL2: string; }>

Example

import { Web3Provider } from "zksync-ethers";
 
const provider = new Web3Provider(window.ethereum);
console.log(`Bridge addresses: ${await provider.getDefaultBridgeAddresses()}`);

`getFeeParams`

Returns the current fee parameters.

override async getFeeParams(): Promise<FeeParams>

Example

import { Web3Provider, utils } from "zksync-ethers";
 
const provider = new Web3Provider(window.ethereum);
const feeParams = await provider.getFeeParams();
console.log(`Fee: ${utils.toJSON(feeParams)}`);

`getGasPrice`

Returns an estimate of the gas price to use in a transaction.

override async getGasPrice(): Promise<BigNumber>

Example

import { Web3Provider } from "zksync-ethers";
 
const provider = new Web3Provider(window.ethereum);
console.log(`Gas price: ${await provider.getGasPrice()}`);

`getL1BatchBlockRange`

Returns the range of blocks contained within a batch given by batch number.

Inputs

Parameter	Type	Description
`l1BatchNumber`	`number`	The L1 batch number.

override async getL1BatchBlockRange(l1BatchNumber: number): Promise<[number, number] | null>

Example

import { Web3Provider, utils } from "zksync-ethers";
 
const provider = new Web3Provider(window.ethereum);
const l1BatchNumber = await provider.getL1BatchNumber();
console.log(`L1 batch block range: ${utils.toJSON(await provider.getL1BatchBlockRange(l1BatchNumber))}`);

`getL1BatchDetails`

Returns data pertaining to a given batch.

Inputs

Parameter	Type	Description
`number`	`number`	The L1 batch number.

override async getL1BatchDetails(number: number): Promise<BatchDetails>

Example

import { Web3Provider, utils } from "zksync-ethers";
 
const provider = new Web3Provider(window.ethereum);
const l1BatchNumber = await provider.getL1BatchNumber();
console.log(`L1 batch details: ${utils.toJSON(await provider.getL1BatchDetails(l1BatchNumber))}`);

`getL1BatchNumber`

Returns the latest L1 batch number.

override async getL1BatchNumber(): Promise<number>

Example

import { Web3Provider } from "zksync-ethers";
 
const provider = new Web3Provider(window.ethereum);
console.log(`L1 batch number: ${await provider.getL1BatchNumber()}`);

`getLogProof`

Returns the proof for a transaction's L2 to L1 log sent via the L1Messenger system contract.

Inputs

Parameter	Type	Description
`txHash`	`BytesLike`	Hash of the L2 transaction.
`index?`	`number`	Optional. Index of the L2 to L1 log in the transaction.

override async getLogProof(txHash: BytesLike, index?: number): Promise<LogProof | null>

Example

import { Web3Provider, utils } from "zksync-ethers";
 
const provider = new Web3Provider(window.ethereum);
// Any L2 -> L1 transaction can be used.
// In this case, withdrawal transaction is used.
const tx = "0x2a1c6c74b184965c0cb015aae9ea134fd96215d2e4f4979cfec12563295f610e";
console.log(`Log ${utils.toJSON(await provider.getLogProof(tx, 0))}`);

`getLogs`

Returns the list of logs that match the specified filter.

Inputs

Parameter	Type	Description
`filter`	`EventFilter` or `Promise<EventFilter>`	The filter object.

override async getLogs(filter: EventFilter | Promise<EventFilter> = {}): Promise<Array<Log>>

Example

import { Web3Provider, utils } from "zksync-ethers";
 
const provider = new Web3Provider(window.ethereum);
console.log(`Logs: ${utils.toJSON(await provider.getLogs({ fromBlock: 0, toBlock: 5, address: utils.L2_ETH_TOKEN_ADDRESS }))}`);

`getMainContractAddress`

Returns the main ZKsync Era smart contract address.

override async getMainContractAddress(): Promise<Address>

Example

import { Web3Provider } from "zksync-ethers";
 
const provider = new Web3Provider(window.ethereum);
console.log(`Main contract: ${await provider.getMainContractAddress()}`);

`getProof`

Returns Merkle proofs for one or more storage values at the specified account along with a Merkle proof of their authenticity.

Inputs

Parameter	Type	Description
`address`	`Address`	The account to fetch storage values and proofs for.
`keys`	`string[]`	Vector of storage keys in the account.
`l1BatchNumber`	`number`	The L1 batch number.

override async getProof(address: Address, keys: string[], l1BatchNumber: number): Promise<StorageProof>

Example

import { Web3Provider, utils } from "zksync-ethers";
 
const provider = new Web3Provider(window.ethereum);
const address = "0x082b1BB53fE43810f646dDd71AA2AB201b4C6b04";
 
// Fetching the storage proof for rawNonces storage slot in NonceHolder system contract.
// mapping(uint256 => uint256) internal rawNonces;
 
// Ensure the address is a 256-bit number by padding it
// because rawNonces slot uses uint256 for mapping addresses and their nonces.
const addressPadded =  ethers.utils.hexZeroPad(address, 32);
 
// Convert the slot number to a hex string and pad it to 32 bytes.
const slotPadded =  ethers.utils.hexZeroPad(ethers.utils.hexlify(0), 32);
 
// Concatenate the padded address and slot number.
const concatenated = addressPadded + slotPadded.slice(2); // slice to remove '0x' from the slotPadded
 
// Hash the concatenated string using Keccak-256.
const storageKey = ethers.utils.keccak256(concatenated);
 
const l1BatchNumber = await provider.getL1BatchNumber();
const storageProof = await provider.getProof(utils.NONCE_HOLDER_ADDRESS, [storageKey], l1BatchNumber);
console.log(`Storage proof: ${utils.toJSON(storageProof)}`);

`getProtocolVersion`

Returns the protocol version.

Inputs

Parameter	Type	Description
`id?`	`number`	Optional. Specific version ID.

override async getProtocolVersion(id?: number): Promise<ProtocolVersion>

Example

import { Web3Provider } from "zksync-ethers";
 
const provider = new Web3Provider(window.ethereum);
console.log(`Protocol version: ${await provider.getProtocolVersion()}`);

`getRawBlockTransactions`

Returns data of transactions in a block.

Inputs

Parameter	Type	Description
`number`	`number`	The block number.

override async getRawBlockTransactions(number: number): Promise<RawBlockTransaction[]>

Example

import { Web3Provider, utils } from "zksync-ethers";
 
const provider = new Web3Provider(window.ethereum);
console.log(`Raw block transactions: ${utils.toJSON(await provider.getRawBlockTransactions(90_000))}`);

`getSigner`

Returns a JsonRpcSigner instance for the specified addressOrIndex. This is used to sign transactions and messages using the connected wallet.

Inputs

Parameter	Type	Description
`addressOrIndex?`	`string` or `number`	Optional. The address or index.

getSigner(addressOrIndex?: string | number): JsonRpcSigner

Example

import { Web3Provider } from "zksync-ethers";
 
const provider = new Web3Provider(window.ethereum);
const signer = provider.getSigner();
const message = "Hello, ZKsync!";
const signature = await signer.signMessage(message);
console.log(`Signature: ${signature}`);

`getTestnetPaymasterAddress`

Returns the testnet paymaster address, if available.

override async getTestnetPaymasterAddress(): Promise<Address | null>

Example

import { Web3Provider } from "zksync-ethers";
 
const provider = new Web3Provider(window.ethereum);
console.log(`Testnet paymaster: ${await provider.getTestnetPaymasterAddress()}`);

`getTransaction`

Returns the transaction for the specified txHash.

Inputs

Parameter	Type	Description
`txHash`	`string`	The transaction hash.

override async getTransaction(txHash: string): Promise<TransactionResponse>

Example

import { Web3Provider } from "zksync-ethers";
 
const provider = new Web3Provider(window.ethereum);
const TX_HASH = "<YOUR_TX_HASH_ADDRESS>";
const tx = await provider.getTransaction(TX_HASH);
 
// Wait until the transaction is processed by the server.
await tx.wait();
// Wait until the transaction is finalized.
await tx.waitFinalize();

`getTransactionDetails`

Returns data from a specific transaction given by the transaction hash.

Inputs

Parameter	Type	Description
`txHash`	`BytesLike`	The transaction hash.

override async getTransactionDetails(txHash: BytesLike): Promise<TransactionDetails>

Example

import { Web3Provider, utils } from "zksync-ethers";
 
const provider = new Web3Provider(window.ethereum);
const TX_HASH = "<YOUR_TX_HASH_ADDRESS>";
console.log(`Transaction details: ${utils.toJSON(await provider.getTransactionDetails(TX_HASH))}`);

`getTransactionReceipt`

Returns the transaction receipt for the specified txHash, if mined.

Inputs

Parameter	Type	Description
`txHash`	`string`	The transaction hash.

override async getTransactionReceipt(txHash: string): Promise<TransactionReceipt>

Example

import { Web3Provider, utils } from "zksync-ethers";
 
const provider = new Web3Provider(window.ethereum);
const TX_HASH = "<YOUR_TX_HASH_ADDRESS>";
console.log(`Transaction receipt: ${utils.toJSON(await provider.getTransactionReceipt(TX_HASH))}`);

`isBaseToken`

Returns whether the token is the base token.

Inputs

Parameter	Type	Description
`token`	`Address`	The address of the token.

override async isBaseToken(token: Address): Promise<boolean>

Example

import { Web3Provider } from "zksync-ethers";
 
const provider = new Web3Provider(window.ethereum);
console.log(`Is base token: ${await provider.isBaseToken("0x5C221E77624690fff6dd741493D735a17716c26B")}`);

`isEthBasedChain`

Returns whether the chain is ETH-based.

override async isEthBasedChain(): Promise<boolean>

Example

import { Web3Provider } from "zksync-ethers";
 
const provider = new Web3Provider(window.ethereum);
console.log(`Is ETH based chain: ${await provider.isEthBasedChain()}`);

`l1ChainId`

Returns the L1 chain ID.

override async l1ChainId(): Promise<number>

Example

import { Web3Provider } from "zksync-ethers";
 
const provider = new Web3Provider(window.ethereum);
console.log(`L1 chain ID: ${await provider.l1ChainId()}`);

`l1TokenAddress`

Returns the L1 token address equivalent for an L2 token address.

Inputs

Parameter	Type	Description
`token`	`Address`	The address of the L2 token.

override async l1TokenAddress(token: Address): Promise<string>

Example

import { Web3Provider } from "zksync-ethers";
 
const provider = new Web3Provider(window.ethereum);
console.log(`L1 token address: ${await provider.l1TokenAddress("0x3e7676937A7E96CFB7616f255b9AD9FF47363D4b")}`);

`l2TokenAddress`

Returns the L2 token address equivalent for an L1 token address.

Inputs

Parameter	Type	Description
`token`	`Address`	The address of the L1 token.

override async l2TokenAddress(token: Address): Promise<string>

Example

import { Web3Provider } from "zksync-ethers";
 
const provider = new Web3Provider(window.ethereum);
console.log(`L2 token address: ${await provider.l2TokenAddress("0x5C221E77624690fff6dd741493D735a17716c26B")}`);

`sendRawTransactionWithDetailedOutput`

Executes a transaction and returns its hash, storage logs, and events that would have been generated if the transaction had already been included in the block.

Inputs

Parameter	Type	Description
`signedTx`	`string`	The signed transaction that needs to be broadcasted.

override async sendRawTransactionWithDetailedOutput(signedTx: string): Promise<TransactionWithDetailedOutput>

Example

import { Web3Provider, Wallet, Provider, utils, types } from "zksync-ethers";
 
const provider = new Web3Provider(window.ethereum);
const signer = Signer.from(
    await provider.getSigner(),
    Number((await provider.getNetwork()).chainId),
    Provider.getDefaultProvider(types.Network.Sepolia)
);
 
const txWithOutputs = await provider.sendRawTransactionWithDetailedOutput(
    await signer.signTransaction({
        to: "0x0330808583C22F812DD9B647Ed9F0411f44A1e6f",
        value: 7_000_000_000,
        customData: {
            gasPerPubdata: 800,
        },
    })
);
console.log(`Transaction: ${utils.toJSON(txWithOutputs)}`);

Provider

Provider object for interacting with ZKsync.

Introduction

Manage accounts and sign transactions in zksync-ethers.