Struct PushDrop 

pub struct PushDrop {
    pub fields: Vec<Vec<u8>>,
    pub private_key: Option<PrivateKey>,
    pub sighash_type: u32,
    pub lock_position: LockPosition,
}

PushDrop script template for embedding data with spending control.

Creates a locking script that pushes data fields onto the stack, drops them with OP_DROP operations, then verifies a signature against a public key (OP_CHECKSIG).

Fields

fields: Vec<Vec<u8>>

Data fields to embed in the script.

private_key: Option<PrivateKey>

Private key for signing (used for both lock pubkey and unlock signature).

sighash_type: u32

Sighash scope for signing (default: SIGHASH_ALL | SIGHASH_FORKID).

lock_position: LockPosition

Where the locking pubkey is placed in the script.

Implementations

impl PushDrop

pub fn new(fields: Vec<Vec<u8>>, key: PrivateKey) -> Self

Create a PushDrop template with data fields and a key for locking and unlocking.

pub fn lock_only(fields: Vec<Vec<u8>>) -> Self

Create a PushDrop template for locking only (no signing capability).

pub fn with_lock_position(self, position: LockPosition) -> Self

Set the lock position (builder pattern).

pub fn unlock(&self, preimage: &[u8]) -> Result<UnlockingScript, ScriptError>

Create an unlocking script from a sighash preimage.

pub fn estimate_unlock_length(&self) -> usize

Estimate the byte length of the unlocking script.

pub fn decode(script: &LockingScript) -> Result<PushDrop, ScriptError>

Decode a PushDrop locking script, recovering the embedded data fields.

Supports both lock positions:

• Before: <pubkey> OP_CHECKSIG <fields...> [<sig>] OP_2DROP...
• After: <fields...> OP_2DROP... <pubkey> OP_CHECKSIG

Defaults to Before (matching TS SDK default).

pub fn decode_with_position( script: &LockingScript, position: LockPosition, ) -> Result<PushDrop, ScriptError>

Decode with explicit lock position.

Trait Implementations

impl Clone for PushDrop

fn clone(&self) -> PushDrop

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PushDrop

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

Formats the value using the given formatter.

impl ScriptTemplateLock for PushDrop

fn lock(&self) -> Result<LockingScript, ScriptError>

Create a PushDrop locking script using the configured lock position.

impl ScriptTemplateUnlock for PushDrop

fn sign(&self, preimage: &[u8]) -> Result<UnlockingScript, ScriptError>

Sign a transaction input and produce an unlocking script.

fn estimate_length(&self) -> Result<usize, ScriptError>

Estimate the byte length of the unlocking script (for fee calculation).