Struct vault_registry::BtcPublicKey

impl PublicKey

To avoid the use of OP_RETURN during the issue process, we use an On-chain Key Derivation scheme (OKD) for Bitcoin’s ECDSA (secp256k1 curve). The vault-registry maintains a “master” public key for each registered Vault which can then be used to derive additional deposit addresses on-demand. Each new issue request triggers the computation of a deposit address. The scheme works as follows:

Preliminaries

A Vault has a private/public keypair (v, V), where V = v·G and G is the base point of the secp256k1 curve. Upon registration, the Vault submits public key V to the BTC-Parachain storage.

OKD scheme

Computes c = H(V || id), where id is the unique issue identifier, generated on-chain by the BTC-Parachain using the user’s AccountId and an internal auto-incrementing nonce as input.
Generates a new public key (“deposit public key”) D = V·c and then the corresponding BTC RIPEMD-160 hash-based address addr(D) (‘deposit’ address) using D as input.
Stores D and addr(D) alongside the id of the issue request.
The vault knows that the private key of D is c·v, where c = H(V || id) is publicly known (so it can be computed by the vault off-chain, or stored on-chain for convenience). The vault can now import the private key

pub fn new_deposit_public_key( &self, secure_id: H256 ) -> Result<PublicKey, Error>

Generates an ephemeral “deposit” public key which can be used in Issue requests to ensure that payments are unique.

Arguments

secure_id - random nonce (as provided by the security module)

pub fn to_hash(&self) -> H160

Calculates the RIPEMD-160 hash of the compressed public key, which can be used to formulate an Address.

pub fn as_bytes(&self) -> &[u8] ⓘ

pub fn to_p2pkh_script_sig(&self, sig: Vec<u8, Global>) -> Script

Construct the p2pkh scriptSig for this compressed pubKey given the signature. Note: we do not check signatures on verification, but this should be non-empty.

pub fn to_p2sh_script_sig(&self, sig: Vec<u8, Global>) -> Script

Construct the scriptSig for a one-signature-required p2sh transaction, given the key’s signature. Note: we do not verify that the signature is valid but this field must be non-empty for parsing to succeed.

pub const fn dummy() -> PublicKey

Trait Implementations§

impl Clone for PublicKey

fn clone(&self) -> PublicKey

Returns a copy of the value. Read more

1.0.0 · source§

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

Performs copy-assignment from source. Read more

impl Debug for PublicKey

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

Formats the value using the given formatter. Read more

impl Decode for PublicKey

fn decode<CodecInputEdqy>( codec_input_edqy: &mut CodecInputEdqy ) -> Result<PublicKey, Error>where CodecInputEdqy: Input,

Attempt to deserialise the value from input.

fn decode_into( input: &mut I, dst: &mut MaybeUninit<Self> ) -> Result<DecodeFinished, Error>where I: Input,

Attempt to deserialize the value from input into a pre-allocated piece of memory. Read more

fn skip(input: &mut I) -> Result<(), Error>where I: Input,

Attempt to skip the encoded value from input. Read more

fn encoded_fixed_size() -> Option<usize>

Returns the fixed encoded size of the type. Read more

impl Default for PublicKey

fn default() -> PublicKey

Returns the “default value” for a type. Read more

impl<'de> Deserialize<'de> for PublicKey

fn deserialize<D>( deserializer: D ) -> Result<PublicKey, <D as Deserializer<'de>>::Error>where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer. Read more

impl Encode for PublicKey

fn size_hint(&self) -> usize

If possible give a hint of expected size of the encoding. Read more

fn encode_to<CodecOutputEdqy>( &self, codec_dest_edqy: &mut CodecOutputEdqy )where CodecOutputEdqy: Output + ?Sized,

Convert self to a slice and append it to the destination.

fn encode(&self) -> Vec<u8, Global> ⓘ

Convert self to an owned vector.

fn using_encoded<R, F>(&self, f: F) -> Rwhere F: FnOnce(&[u8]) -> R,

Convert self to a slice and then invoke the given closure with it.

fn encoded_size(&self) -> usize

Calculates the encoded size. Read more

impl From<[u8; 33]> for PublicKey

fn from(bytes: [u8; 33]) -> PublicKey

Converts to this type from the input type.

impl MaxEncodedLen for PublicKey

fn max_encoded_len() -> usize

Upper bound, in bytes, of the maximum encoded size of this item.

impl PartialEq<PublicKey> for PublicKey

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

This method tests for self and other values to be equal, and is used by ==.

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fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for PublicKey

fn serialize<S>( &self, serializer: S ) -> Result<<S as Serializer>::Ok, <S as Serializer>::Error>where S: Serializer,

Serialize this value into the given Serde serializer. Read more

impl TypeInfo for PublicKey

type Identity = PublicKey

The type identifying for which type info is provided. Read more

fn type_info() -> Type<MetaForm>

Returns the static type identifier for Self.

impl StructuralPartialEq for PublicKey

Auto Trait Implementations§

impl RefUnwindSafe for PublicKey

impl Send for PublicKey

impl Sync for PublicKey

impl Unpin for PublicKey

impl UnwindSafe for PublicKey

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Gets the TypeId of self. Read more

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Immutably borrows from an owned value. Read more

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True iff no bits are set.

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Checks if this value is equivalent to the given key. Read more

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