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ScanError

zcash_client_backend::scanning

Enum ScanError 

Source 
#[non_exhaustive]
pub enum ScanError {
    EncodingInvalid {
        at_height: BlockHeight,
        txid: TxId,
        pool_type: ShieldedPool,
        index: usize,
    },
    PrevHashMismatch {
        at_height: BlockHeight,
    },
    BlockHeightDiscontinuity {
        prev_height: BlockHeight,
        new_height: BlockHeight,
    },
    TreeSizeMismatch {
        protocol: ShieldedPool,
        at_height: BlockHeight,
        given: u32,
        computed: u32,
    },
    TreeSizeUnknown {
        protocol: ShieldedPool,
        at_height: BlockHeight,
    },
    TreeSizeInvalid {
        protocol: ShieldedPool,
        at_height: BlockHeight,
    },
    TreeSizeOverflow {
        protocol: ShieldedPool,
        at_height: BlockHeight,
    },
    TransparentPrevoutInvalid {
        at_height: BlockHeight,
        txid: TxId,
        index: usize,
    },
}
Expand description

Errors that may occur in chain scanning

Variants (Non-exhaustive)§

This enum is marked as non-exhaustive
Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.
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EncodingInvalid

The encoding of a compact Sapling output or compact Orchard action was invalid.

Fields

§at_height: BlockHeight
§txid: TxId
§pool_type: ShieldedPool
§index: usize
§

PrevHashMismatch

The hash of the parent block given by a proposed new chain tip does not match the hash of the current chain tip.

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§at_height: BlockHeight
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BlockHeightDiscontinuity

The block height field of the proposed new block is not equal to the height of the previous block + 1.

Fields

§prev_height: BlockHeight
§new_height: BlockHeight
§

TreeSizeMismatch

The note commitment tree size for the given protocol at the proposed new block is not equal to the size at the previous block plus the count of this block’s outputs.

Fields

§protocol: ShieldedPool
§at_height: BlockHeight
§given: u32
§computed: u32
§

TreeSizeUnknown

The size of the note commitment tree for the given protocol was not provided as part of a CompactBlock being scanned, making it impossible to construct the nullifier for a detected note.

Fields

§protocol: ShieldedPool
§at_height: BlockHeight
§

TreeSizeInvalid

We were provided chain metadata for a block containing note commitment tree metadata that is invalidated by the data in the block itself. This may be caused by the presence of default values in the chain metadata.

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§protocol: ShieldedPool
§at_height: BlockHeight
§

TreeSizeOverflow

The size of the note commitment tree for the given protocol would exceed the u32 range as a result of applying the outputs in the block being scanned.

Fields

§protocol: ShieldedPool
§at_height: BlockHeight
§

TransparentPrevoutInvalid

Available on crate feature transparent-inputs only.

The prevout reference of a compact transparent input could not be decoded.

Scanning fails rather than skipping such an input: without its prevout the wallet cannot determine whether the input spends one of its own outputs, and treating it as unrelated would silently overstate the wallet’s balance.

Fields

§at_height: BlockHeight
§txid: TxId
§index: usize

Implementations§

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impl ScanError

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pub fn is_continuity_error(&self) -> bool

Returns whether this error is the result of a failed continuity check

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pub fn at_height(&self) -> BlockHeight

Returns the block height at which the scan error occurred

Trait Implementations§

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impl Clone for ScanError

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fn clone(&self) -> Self

Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for ScanError

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl Display for ScanError

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl Error for ScanError

1.30.0 · Source§

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any. Read more
1.0.0 · Source§

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

Read more
1.0.0 · Source§

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

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fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)
Provides type-based access to context intended for error reports. Read more
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impl<WE, BSE> From<ScanError> for Error<WE, BSE>

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fn from(e: ScanError) -> Self

Converts to this type from the input type.
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impl<E> From<ScanError> for ScanBlockError<E>

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fn from(e: ScanError) -> Self

Converts to this type from the input type.

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