feat: add arbitrum

[kaladinlight]

Description

Add arbitrum support:

• Send/Receive
• Balances/TxHistory
• Nft Support
• Swap Support (zrx, oneinch, and lifi)

TODO:

• Support any other swappers with arbitrum support (cow, lifi, one inch)?
• Update chain adapter and unchained client tests once unchained coinstack is up and running
• Bump hdwallet once merged and published

Follow Up:

• Fiat on-ramps

Pull Request Type

• 🐛 Bug fix (Non-breaking Change: Fixes an issue)
• 🛠️ Chore (Non-breaking Change: Doc updates, pkg upgrades, typos, etc..)
• 💅 New Feature (Breaking/Non-breaking Change)

Issue (if applicable)

N/A

Risk

Low

Testing

• Test send and receive of native assets and tokens
• Validate correct balances, charts, and transaction history
• Validate correct nft display
• Test swapping native -> token, token -> native, token -> token
• Spot check functionality working on all supported wallets
• Spot check gas estimations/prices align with what is reported on block explorer

Engineering

☝️

Operations

☝️

Screenshots (if applicable)

• Zrx:
  

• LiFi:
  

• OneInch:
  

[gomesalexandre]

LGTM, conceptual stamp pending runtime testing

[gomesalexandre]

Tested locally, without an Arbitrum native/asset balance

Asset search

Asset page

Accounts page

Assets page

Chain switch

Tested with frame-injected account

Accounts page

Account page

Asset page

DeFi opportunities - tested against Zapper

Note the asset and underlying asset balances are correct but the position fiat value isn't - unrelated to this PR however.

NFTs

Tested with MM

Tx history

Self-send