zcash_client_backend::data_api

Enum TransactionDataRequest

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pub enum TransactionDataRequest {
    GetStatus(TxId),
    Enhancement(TxId),
    TransactionsInvolvingAddress {
        address: TransparentAddress,
        block_range_start: BlockHeight,
        block_range_end: Option<BlockHeight>,
        request_at: Option<SystemTime>,
        tx_status_filter: TransactionStatusFilter,
        output_status_filter: OutputStatusFilter,
    },
}
Expand description

A request for transaction data enhancement, spentness check, or discovery of spends from a given transparent address within a specific block range.

Variants§

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GetStatus(TxId)

Information about the chain’s view of a transaction is requested.

The caller evaluating this request on behalf of the wallet backend should respond to this request by determining the status of the specified transaction with respect to the main chain; if using lightwalletd for access to chain data, this may be obtained by interpreting the results of the GetTransaction RPC method. It should then call WalletWrite::set_transaction_status to provide the resulting transaction status information to the wallet backend.

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Enhancement(TxId)

Transaction enhancement (download of complete raw transaction data) is requested.

The caller evaluating this request on behalf of the wallet backend should respond to this request by providing complete data for the specified transaction to wallet::decrypt_and_store_transaction; if using lightwalletd for access to chain state, this may be obtained via the GetTransaction RPC method. If no data is available for the specified transaction, this should be reported to the backend using WalletWrite::set_transaction_status. A TransactionDataRequest::Enhancement request subsumes any previously existing TransactionDataRequest::GetStatus request.

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TransactionsInvolvingAddress

Available on crate feature transparent-inputs only.

Information about transactions that receive or spend funds belonging to the specified transparent address is requested.

Fully transparent transactions, and transactions that do not contain either shielded inputs or shielded outputs belonging to the wallet, may not be discovered by the process of chain scanning; as a consequence, the wallet must actively query to find transactions that spend such funds. Ideally we’d be able to query by [OutPoint] but this is not currently functionality that is supported by the light wallet server.

The caller evaluating this request on behalf of the wallet backend should respond to this request by detecting transactions involving the specified address within the provided block range; if using lightwalletd for access to chain data, this may be performed using the GetTaddressTxids RPC method. It should then call wallet::decrypt_and_store_transaction for each transaction so detected.

Fields

§address: TransparentAddress

The address to request transactions and/or UTXOs for.

§block_range_start: BlockHeight

Only transactions mined at heights greater than or equal to this height should be returned.

§block_range_end: Option<BlockHeight>

Only transactions mined at heights less than this height should be returned.

§request_at: Option<SystemTime>

If a request_at time is set, the caller evaluating this request should attempt to retrieve transaction data related to the specified address at a time that is as close as practical to the specified instant, and in a fashion that decorrelates this request to a light wallet server from other requests made by the same caller.

This may be ignored by callers that are able to satisfy the request without exposing correlations between addresses to untrusted parties; for example, a wallet application that uses a private, trusted-for-privacy supplier of chain data can safely ignore this field.

§tx_status_filter: TransactionStatusFilter

The caller should respond to this request only with transactions that conform to the specified transaction status filter.

§output_status_filter: OutputStatusFilter

The caller should respond to this request only with transactions containing outputs that conform to the specified output status filter.

Trait Implementations§

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impl Clone for TransactionDataRequest

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fn clone(&self) -> TransactionDataRequest

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

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

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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 Hash for TransactionDataRequest

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fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher. Read more
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fn hash_slice<H>(data: &[Self], state: &mut H)
where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
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impl Ord for TransactionDataRequest

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fn cmp(&self, other: &TransactionDataRequest) -> Ordering

This method returns an Ordering between self and other. Read more
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fn max(self, other: Self) -> Self
where Self: Sized,

Compares and returns the maximum of two values. Read more
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fn min(self, other: Self) -> Self
where Self: Sized,

Compares and returns the minimum of two values. Read more
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fn clamp(self, min: Self, max: Self) -> Self
where Self: Sized,

Restrict a value to a certain interval. Read more
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impl PartialEq for TransactionDataRequest

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fn eq(&self, other: &TransactionDataRequest) -> bool

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl PartialOrd for TransactionDataRequest

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fn partial_cmp(&self, other: &TransactionDataRequest) -> Option<Ordering>

This method returns an ordering between self and other values if one exists. Read more
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fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator. Read more
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fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator. Read more
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fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator. Read more
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fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator. Read more
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impl Eq for TransactionDataRequest

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impl StructuralPartialEq for TransactionDataRequest

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