EmaOracle

---

Storage functions

---

Accumulator

Accumulator for oracle data in current block that will be recorded at the end of the block.

Python

result = substrate.query(
    'EmaOracle', 'Accumulator', []
)

Return value

'scale_info::556'

---

Oracles

Orace storage keyed by data source, involved asset ids and the period length of the oracle.

Stores the data entry as well as the block number when the oracle was first initialized.

Python

result = substrate.query(
    'EmaOracle', 'Oracles', [
    '[u8; 8]',
    ('u32', 'u32'),
    (
        'LastBlock',
        'Short',
        'TenMinutes',
        'Hour',
        'Day',
        'Week',
    ),
]
)

Return value

(
    {
        'liquidity': {'a': 'u128', 'b': 'u128'},
        'price': {'d': 'u128', 'n': 'u128'},
        'updated_at': 'u32',
        'volume': {
            'a_in': 'u128',
            'a_out': 'u128',
            'b_in': 'u128',
            'b_out': 'u128',
        },
    },
    'u32',
)

---

Constants

---

MaxUniqueEntries

Maximum number of unique oracle entries expected in one block.

Value

30

Python

constant = substrate.get_constant('EmaOracle', 'MaxUniqueEntries')

---

Errors

---

OnTradeValueZero

---

TooManyUniqueEntries

---