Blockchain Transactions

View a Bitcoin wallet balance and transactions for a specified address.

Installation

Open the Xcode project and build. No 3rd party libraries are used.

Description

Transaction data is loaded from a GET request to the Blockchain API. This JSON is decoded using two structs:

Wallet

• Current balance
• List of Transactions

Transaction

• Detailed information about a transaction (amount, time, hash, etc.)

Transactions are displayed in a TransactionCollectionViewCell by TransactionsViewController.

TransactionsViewController

• Can present transactions in a list or detail layout
• Supports Landscape and Portrait rotation

List Layout

• Vertical scrolling list of transactions
• Red rows are sent Bitcoins
• Green rows are received Bitcoins
• Tapping a row will display more details about the transaction

Detail Layout

• Horizontal scrolling list of transactions
• Additional details about the transaction (hash, fee, weight, size)
• Tapping Close in navigation bar returns to the list view

Additionally, the TransactionViewController can display two additional types of cells:

LoadingCollectionViewCell

• Shows activity indicator when refreshing data

ErrorCollectionViewCell

• Shows Error message and retry button enountering an error while loading data

Screenshots

Todo

Rotation

• Landscape detail view overlaps safe area

Animations

• Animations between list and detial sometimes jump

Gestures

• Pinch to zoom out of detail view

Price

• Display transactions in USD and BTC