Migrating from v3 to v4

Introduction

@arbitrum/sdk v4 introduces significant changes to improve support Orbit chains from Offchain Labs. This guide outlines the breaking changes to know before migrating your existing v3 code to v4.

Major Changes Overview

Terminology change from L1/L2 to parent/child
Network types and functions updated
Updates to AssetBridger and Erc20Bridger classes
Changes to Message classes

Detailed Changes

1. Terminology change from L1/L2 to parent/child

Most instances of "L1" and "L2" have been replaced with "parent" and "child" respectively. This change reflects the more general parent-child relationship between chains in the Arbitrum ecosystem.

In most circumstances, when referring to a parent-child relationship between chains, the terms "parent" and "child" are used.
Though, when referring explicitly to "L1", "L2", or "L3", those specific terms are still used.

2. Network types and functions updated

The L1Network is no longer required to be registered before bridging.
Only Arbitrum networks need to be registered.
Arbitrum networks are defined as Arbitrum One, Arbitrum testnets, and any Orbit chain.
If you need a full list of Arbitrum networks, you can use the new getArbitrumNetworks function.
To list all of the children of a network, use the new getChildrenForNetwork function.

v3 Name	v4 Name
`L2Network`	`ArbitrumNetwork`
`getL2Network`	`getArbitrumNetwork`
`l2Networks`	`getArbitrumNetworks`
`addCustomNetwork`	`registerCustomArbitrumNetwork`
`Network`	removed
`L1Network`	removed
`getL1Network`	removed
`getParentForNetwork`	removed

`ArbitrumNetwork` type

Network type has been replaced with the ArbitrumNetwork type and some properties have been removed or renamed.

v3 Name	v4 Name
`chainID`	`chainId`
`partnerChainID`	`parentChainId`
`explorerUrl`	removed
`isArbitrum`	removed
`partnerChainIDs`	removed
`nitroGenesisBlock`	removed
`nitroGenesisL1Block`	removed
`depositTimeout`	removed
`blockTime`	removed

`TokenBridge` type

The TokenBridge type within theArbitrumNetwork object has been updated.

v3 Name	v4 Name
`l1CustomGateway`	`parentCustomGateway`
`l1ERC20Gateway`	`parentErc20Gateway`
`l1GatewayRouter`	`parentGatewayRouter`
`l1MultiCall`	`parentMultiCall`
`l1ProxyAdmin`	`parentProxyAdmin`
`l1Weth`	`parentWeth`
`l1WethGateway`	`parentWethGateway`
`l2CustomGateway`	`childCustomGateway`
`l2ERC20Gateway`	`childErc20Gateway`
`l2GatewayRouter`	`childGatewayRouter`
`l2Multicall`	`childMultiCall`
`l2ProxyAdmin`	`childProxyAdmin`
`l2Weth`	`childWeth`
`l2WethGateway`	`childWethGateway`

3. Updates to `AssetBridger` and `Erc20Bridger` classes

`AssetBridger` Class Methods

The AssetBridger class methods and properties have been renamed to reflect the new parent-child terminology.

v3 Name	v4 Name
`l2Network`	`childNetwork`
`checkL1Network`	`checkParentNetwork`
`checkL2Network`	`checkChildNetwork`

`AssetBridger` Class Method Parameters

The objects passed to the class methods of classes that inherit from AssetBridger (EthBridger and Erc20Bridger) have been renamed.

v3 Name	v4 Name
`erc20L1Address`	`erc20ParentAddress`
`l1Provider`	`parentProvider`
`l2Provider`	`childProvider`
`l1Signer`	`parentSigner`
`l2Signer`	`childSigner`

`Erc20Bridger` Class Methods

v3 Name	v4 Name
`getL1GatewayAddress`	`getParentGatewayAddress`
`getL2GatewayAddress`	`getChildGatewayAddress`
`getL2WithdrawalEvents`	`getWithdrawalEvents`
`getL1TokenContract`	`getParentTokenContract`
`getL1ERC20Address`	`getParentErc20Address`
`getL2TokenContract`	`getChildTokenContract`
`getL2ERC20Address`	`getChildErc20Address`
`l1TokenIsDisabled`	`isDepositDisabled`
`l1Provider`	`parentProvider`
`getL1GatewaySetEvents`	`getParentGatewaySetEvents`
`getL2GatewaySetEvents`	`getChildGatewaySetEvents`

`Erc20L1L3Bridger` Class Methods

v3 Name	v4 Name
`getL2ERC20Address`	`getL2Erc20Address`
`getL3ERC20Address`	`getL3Erc20Address`

4. Changes to Message classes

Message classes have been renamed and their methods updated:

v3 Name	v4 Name
`L1TransactionReceipt`	`ParentTransactionReceipt`
`L1ContractTransaction`	`ParentContractTransaction`
`L1ToL2Message`	`ParentToChildMessage`
`L1ToL2MessageWriter`	`ParentToChildMessageWriter`
`L1ToL2MessageReader`	`ParentToChildMessageReader`
`L1ToL2MessageReaderClassic`	`ParentToChildMessageReaderClassic`
`L1ToL2MessageStatus`	`ParentToChildMessageStatus`
`L1ToL2MessageGasEstimator`	`ParentToChildMessageGasEstimator`
`L2TransactionReceipt`	`ChildTransactionReceipt`
`L2ContractTransaction`	`ChildContractTransaction`
`L2ToL1Message`	`ChildToParentMessage`
`L2ToL1MessageWriter`	`ChildToParentMessageWriter`
`L2ToL1MessageReader`	`ChildToParentMessageReader`
`L2ToL1MessageStatus`	`ChildToParentMessageStatus`
`EthDepositStatus`	`EthDepositMessageStatus`
`EthDepositMessageWaitResult`	`EthDepositMessageWaitForStatusResult`
`L1ToL2MessageWaitResult`	`ParentToChildMessageWaitForStatusResult`

`ChildToParentMessageClassic`

v3 Name	v4 Name
`getL2ToL1Events`	`getChildToParentEvents`

`ChildToParentChainMessageNitro`

v3 Name	v4 Name
`getL2ToL1Events`	`getChildToParentEvents`

`ChildTransactionReceipt`

v3 Name	v4 Name
`getL2ToL1Events`	`getChildToParentEvents`
`getL2ToL1Messages`	`getChildToParentMessages`

`ParentToChildMessage`

v3 Name	v4 Name
`EthDepositStatus`	`EthDepositMessageStatus`

`ParentToChildMessageStatus`

v3 Name	v4 Name
`FUNDS_DEPOSITED_ON_L2`	`FUNDS_DEPOSITED_ON_CHILD`

`ParentTransactionReceipt`

v3 Name	v4 Name
`getL1ToL2MessagesClassic`	`getParentToChildMessagesClassic`
`getL1ToL2Messages`	`getParentToChildMessages`

`ParentEthDepositTransactionReceipt`

v3 Name	v4 Name
`waitForL2`	`waitForChildTransactionReceipt`

`ParentContractCallTransactionReceipt`

v3 Name	v4 Name
`waitForL2`	`waitForChildTransactionReceipt`

Introduction​

Major Changes Overview​

Detailed Changes​

1. Terminology change from L1/L2 to parent/child​

2. Network types and functions updated​

ArbitrumNetwork type​

TokenBridge type​

3. Updates to AssetBridger and Erc20Bridger classes​

AssetBridger Class Methods​

AssetBridger Class Method Parameters​

Erc20Bridger Class Methods​

Erc20L1L3Bridger Class Methods​

4. Changes to Message classes​

ChildToParentMessageClassic​

ChildToParentChainMessageNitro​

ChildTransactionReceipt​

ParentToChildMessage​

ParentToChildMessageStatus​

ParentTransactionReceipt​

ParentEthDepositTransactionReceipt​

ParentContractCallTransactionReceipt​