Ethereum integration. (v2.0)

[nebali]

• Add eth node's health to /api/admin
• Add internal -> external transactions
• Fix dialyzer picking up wrong build path for :db app
• WIP: Receiving blockchain transactions
• Add Ethereum connectivity status to /api/admin
• Geth test integration
• Add nonce handler
• Add reference links to API responsibilities
• Add ability to generate ERC20 tokens
• Move balance parsing logic to eth_blockchain
• Fix private key generation
• Create cold wallet references
• Web3 integration
• Blockchain wallet page
• Advanced filtering for transactions
• Management endpoints for blockchain wallets
• Handle Ethereum transactions
• Eth blockchain transaction
• Ethereum Multi-Node Interface
• Add 2FA support via authenticator
• Retrieve blockchain balance
• Retrieve balances on the blockchain for given tokens flag/ethereum integration
• Add blockchain wallet schema
• Blockchain wallet schema
• Geth ethereum node communication
• Ethereum Node Communication (with Geth adapter)
• Ethereum account generation in eWallet
• Set up staging Geth cluster
• Ethereum Node interface project
• ERC-20 token import
• Ability to retrieve blockchain transactions details
• Add a page to interface with cold wallets: metamask, ledger
• Turn an existing internal token to an ERC-20 token
• Create ERC-20 token
• Import ERC-20 token
• Update Token and add ETH generating module
• Add nonce GenServer to allow transaction chaining.
• Add endpoint to create cold_wallet reference
• Move balance parsing logic from geth subapp to eth subapp
• Support 2FA in admin panel
• Run geth with tests (mix test --geth)
• List blockchain wallets (hot + cold) + see balances
• Handle blockchain transaction in transfer modal
• Update transactions to show Ethereum ones
• Add a way in the admin panel to generate an Ethereum deposit address for each wallet.
• Prepare blockchain token minting
• Refactor EthBlockchain Adapter
• Support lower and upper case for blockchain addresses
• Prepare blockchain call for minting of blockchain tokens
• Save and process all blockchain addresses in lowercase
• Add ability to deposit funds from hot wallet to OmiseGO Network in Admin Panel
• Pad private keys before encoding and storage
• Fix passing boolean-incompatible value throwing error on mix omg.config
• Passing an integer when setting boolean settings crashes
• Revert nonce if a blockchain transaction returned an error
• Refactor blockchain transactions
• Extract transaction into blockchain_transaction
• Adjust nonce value if transaction gets rejected by the network
• Move funds to hot wallet after deposit
• Blockchain settings
• Add blockchain settings
• Setup listener for hot wallet on boot
• Consolidate blockchain transaction listener lifecycle
• Add childchain settings
• Validate token blockchain status
• Refactor: Move plasma deposit transactions to new table
• Support sending MoreVP transactions from Admin Panel
• "Cannot get connection id for node" error during start up
• Prevent blockchain transaction for tokens that are not confirmed
• Handle minting of blockchain tokens
• Handle token blockchain status
• Integrate Potterhat into eWallet
• Send transactions events to websocket channels
• Blockchain network statistics: gas price and wait time
• Add blockchain setting in Configuration page
• Update tokens pages to handle ETH + ERC-20 tokens