Tracking issue for Oracle Nodes

Tasks

Add oracle node binary that exposes an HTTP interface that reads information from Algorand and signs the resulting authorization data

use algonaut to read blockchain Algorand blockchain state (Testnet) through PureStake APIs feat: create oracle-node API #18
Look at signing algorithms and Define/Build the protocol
Add HTTP interface/endpoint
Sign the resulting authorization data response

Authorization Data Struct:

Name	Type	Description	How
redeemed	bool	Confirmation that the DRT have been redeemed correctly	Check destination address is same as reserve address of the DRT - check txn receiver is same as reserve address on DRT
drt_creator	Algorand Address	The Address or other cryptographic identifier that indicates who created the DRT	Get management address from asset_id
drt_redeemer	[u8;32]	The public key of the party that redeemed the DRT	From txn_id, lookup account of receiver to get public key
executable_hash	hash (sha512_256)	Information encoded in the DRT	From asset_id, find creation transaction, take note hashes
data_package_hash	hash (sha512_256)
executable_url	&str
data_package_url	&str

Signed Authorization Data Struct:

Name	Type	Description	How
signature	byteArray	Sign Auth Data	Use private key of oracle node (can be stored as env variable) and sign serialized authdata value
auth_data	AuthData

Functions:
get_auth_data(txn_id, asset_id) -> AuthData
sign_auth_data(auth_data) -> SignedAuthData