Preimage

---

Calls

---

ensure_updated

Attributes

Name	Type
hashes	Vec<T::Hash>

Python

call = substrate.compose_call(
    'Preimage', 'ensure_updated', {'hashes': ['scale_info::12']}
)

---

note_preimage

Attributes

Name	Type
bytes	Vec<u8>

Python

call = substrate.compose_call(
    'Preimage', 'note_preimage', {'bytes': 'Bytes'}
)

---

request_preimage

Attributes

Name	Type
hash	T::Hash

Python

call = substrate.compose_call(
    'Preimage', 'request_preimage', {'hash': 'scale_info::12'}
)

---

unnote_preimage

Attributes

Name	Type
hash	T::Hash

Python

call = substrate.compose_call(
    'Preimage', 'unnote_preimage', {'hash': 'scale_info::12'}
)

---

unrequest_preimage

Attributes

Name	Type
hash	T::Hash

Python

call = substrate.compose_call(
    'Preimage', 'unrequest_preimage', {'hash': 'scale_info::12'}
)

---

Events

---

Cleared

Attributes

Name	Type	Composition
hash	T::Hash	scale_info::12

---

Noted

Attributes

Name	Type	Composition
hash	T::Hash	scale_info::12

---

Requested

Attributes

Name	Type	Composition
hash	T::Hash	scale_info::12

---

Storage functions

---

PreimageFor

Python

result = substrate.query(
    'Preimage', 'PreimageFor', [('scale_info::12', 'u32')]
)

Return value

'Bytes'

---

RequestStatusFor

Python

result = substrate.query(
    'Preimage', 'RequestStatusFor', ['scale_info::12']
)

Return value

{
    'Requested': {
        'count': 'u32',
        'maybe_len': (None, 'u32'),
        'maybe_ticket': (None, ('AccountId', 'u128')),
    },
    'Unrequested': {'len': 'u32', 'ticket': ('AccountId', 'u128')},
}

---

StatusFor

Python

result = substrate.query(
    'Preimage', 'StatusFor', ['scale_info::12']
)

Return value

{
    'Requested': {
        'count': 'u32',
        'deposit': (None, ('AccountId', 'u128')),
        'len': (None, 'u32'),
    },
    'Unrequested': {'deposit': ('AccountId', 'u128'), 'len': 'u32'},
}

---

Errors

---

AlreadyNoted

---

NotAuthorized

---

NotNoted

---

NotRequested

---

Requested

---

TooBig

---

TooFew

---

TooMany

---