obligation_deserialization.py

import base64

data64 = 'AQAAAAAAAAAA9gS5bBWmAYqIWY0MWjEP4rYzOqSLqRblAr4CV4ylA4RUb5AegR/zDQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAJXH2dBhmCO+Qx2UVe6Jt+82VluOtYSKxdN49XuVOGTxQMfjEzKi8XVUfL4wQoTtWZmE7hxytvWvNfNpOPmRXJQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=='
data_bytes = base64.b64decode(data64)

print(data_bytes)
print(len(data_bytes)) # 265

from construct import Int8ub, Int64ub, Struct, Array, Byte, Bytes

# Mainnet obligation format:
#
# /// Borrow obligation state
# [derive(Clone, Debug, Default, PartialEq)]
# pub struct Obligation {
#     /// Version of the obligation
#     pub version: u8,
#     /// Amount of collateral tokens deposited for this obligation
#     pub deposited_collateral_tokens: u64,
#     /// Reserve which collateral tokens were deposited into
#     pub collateral_reserve: Pubkey,
#     /// Borrow rate used for calculating interest.
#     pub cumulative_borrow_rate_wads: Decimal,
#     /// Amount of tokens borrowed for this obligation plus interest
#     pub borrowed_liquidity_wads: Decimal,
#     /// Reserve which tokens were borrowed from
#     pub borrow_reserve: Pubkey,
#     /// Mint address of the tokens for this obligation
#     pub token_mint: Pubkey,
# } 
#
# const OBLIGATION_LEN: usize = 265;

PUBLIC_KEY_LAYOUT = Bytes(32)

format = Struct(
    "version" / Int8ub,
    "deposited_collateral_tokens" / Int64ub,
    "collateral_reserve" / PUBLIC_KEY_LAYOUT,
    "cumulative_borrow_rate_wads" / Array(3, Int64ub),
    "borrowed_liquidity_wads" / Array(3, Int64ub),
    "borrow_reserve" / PUBLIC_KEY_LAYOUT,
    "token_mint" / PUBLIC_KEY_LAYOUT
)

obligation_container = format.parse(data_bytes)
print(obligation_container)
# Container: 
#     version = 1
#     deposited_collateral_tokens = 0
#     collateral_reserve = b'\xf6\x04\xb9l\x15\xa6\x01\x8a\x88Y\x8d\x0cZ1\x0f\xe2'... (truncated, total 32)
#     cumulative_borrow_rate_wads = ListContainer: 
#         6084240082290602765
#         0
#         0
#     borrowed_liquidity_wads = ListContainer: 
#         0
#         10792834521030468542
#         4836184671660914671
#     borrow_reserve = b'6V[\x8e\xb5\x84\x8a\xc5\xd3x\xf5{\x958d\xf1'... (truncated, total 32)
#     token_mint = b'\x99\x84\xee\x1cr\xb6\xf5\xaf5\xf3i8\xf9\x91\\\x94'... (truncated, total 32)