Struct ics23::ExistenceProof [−][src]
pub struct ExistenceProof {
pub key: Vec<u8>,
pub value: Vec<u8>,
pub leaf: Option<LeafOp>,
pub path: Vec<InnerOp>,
}
Expand description
ExistenceProof takes a key and a value and a set of steps to perform on it. The result of peforming all these steps will provide a “root hash”, which can be compared to the value in a header.
Since it is computationally infeasible to produce a hash collission for any of the used cryptographic hash functions, if someone can provide a series of operations to transform a given key and value into a root hash that matches some trusted root, these key and values must be in the referenced merkle tree.
The only possible issue is maliablity in LeafOp, such as providing extra prefix data, which should be controlled by a spec. Eg. with lengthOp as NONE, prefix = FOO, key = BAR, value = CHOICE and prefix = F, key = OOBAR, value = CHOICE would produce the same value.
With LengthOp this is tricker but not impossible. Which is why the “leafPrefixEqual” field in the ProofSpec is valuable to prevent this mutability. And why all trees should length-prefix the data before hashing it.
Fields
key: Vec<u8>
value: Vec<u8>
leaf: Option<LeafOp>
path: Vec<InnerOp>
Trait Implementations
Returns the encoded length of the message without a length delimiter.
Encodes the message to a buffer. Read more
Encodes the message to a newly allocated buffer.
Encodes the message with a length-delimiter to a buffer. Read more
Encodes the message with a length-delimiter to a newly allocated buffer.
Decodes an instance of the message from a buffer. Read more
fn decode_length_delimited<B>(buf: B) -> Result<Self, DecodeError> where
B: Buf,
Self: Default,
fn decode_length_delimited<B>(buf: B) -> Result<Self, DecodeError> where
B: Buf,
Self: Default,
Decodes a length-delimited instance of the message from the buffer.
Decodes an instance of the message from a buffer, and merges it into self
. Read more
Decodes a length-delimited instance of the message from buffer, and
merges it into self
. Read more
This method tests for self
and other
values to be equal, and is used
by ==
. Read more
This method tests for !=
.
Auto Trait Implementations
impl RefUnwindSafe for ExistenceProof
impl Send for ExistenceProof
impl Sync for ExistenceProof
impl Unpin for ExistenceProof
impl UnwindSafe for ExistenceProof
Blanket Implementations
Mutably borrows from an owned value. Read more