e55b3ed2ce
* add conversion for `SmtLeaf` * introduce `SmtProof` scaffolding * implement `verify_membership()` * SmtLeaf: knows its index * `SmtLeaf::index` * `SmtLeaf::get_value()` returns an Option * fix `verify_membership()` * impl `SmtProof::get` * impl `into_parts()` * `SmtProof::compute_root` * use `SmtProof` in `Smt::open` * `SmtLeaf` constructors * Vec * impl `Error` for `SmtLeafError` * fix std Error * move Word/Digest conversions to LeafIndex * `SmtProof::new()` returns an error * `SparseMerkleTree::path_and_leaf_to_opening` * `SmtLeaf`: serializable/deserializable * `SmtProof`: serializable/deserializable * add tests for SmtLeaf serialization * move `SmtLeaf` to submodule * use constructors internally * fix docs * Add `Vec` * add `Vec` to tests * no_std use statements * fmt * `Errors`: make heading * use `SMT_DEPTH` * SmtLeaf single case: check leaf index * Multiple case: check consistency with leaf index * use `pub(super)` instead of `pub(crate)` * use `pub(super)` * `SmtLeaf`: add `num_entries()` accessor * Fix `SmtLeaf` serialization * improve leaf serialization tests
86 lines
2.6 KiB
Rust
86 lines
2.6 KiB
Rust
use core::fmt;
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use crate::{
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hash::rpo::RpoDigest,
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merkle::{LeafIndex, SMT_DEPTH},
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utils::collections::Vec,
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Word,
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};
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// SMT LEAF ERROR
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// =================================================================================================
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#[derive(Clone, Debug, PartialEq, Eq)]
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pub enum SmtLeafError {
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InconsistentKeys {
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entries: Vec<(RpoDigest, Word)>,
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key_1: RpoDigest,
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key_2: RpoDigest,
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},
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InvalidNumEntriesForMultiple(usize),
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SingleKeyInconsistentWithLeafIndex {
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key: RpoDigest,
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leaf_index: LeafIndex<SMT_DEPTH>,
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},
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MultipleKeysInconsistentWithLeafIndex {
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leaf_index_from_keys: LeafIndex<SMT_DEPTH>,
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leaf_index_supplied: LeafIndex<SMT_DEPTH>,
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},
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}
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#[cfg(feature = "std")]
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impl std::error::Error for SmtLeafError {}
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impl fmt::Display for SmtLeafError {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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use SmtLeafError::*;
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match self {
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InvalidNumEntriesForMultiple(num_entries) => {
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write!(f, "Multiple leaf requires 2 or more entries. Got: {num_entries}")
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}
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InconsistentKeys { entries, key_1, key_2 } => {
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write!(f, "Multiple leaf requires all keys to map to the same leaf index. Offending keys: {key_1} and {key_2}. Entries: {entries:?}.")
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}
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SingleKeyInconsistentWithLeafIndex { key, leaf_index } => {
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write!(
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f,
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"Single key in leaf inconsistent with leaf index. Key: {key}, leaf index: {}",
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leaf_index.value()
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)
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}
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MultipleKeysInconsistentWithLeafIndex {
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leaf_index_from_keys,
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leaf_index_supplied,
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} => {
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write!(
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f,
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"Keys in entries map to leaf index {}, but leaf index {} was supplied",
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leaf_index_from_keys.value(),
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leaf_index_supplied.value()
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)
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}
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}
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}
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}
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// SMT PROOF ERROR
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// =================================================================================================
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#[derive(Clone, Debug, PartialEq, Eq)]
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pub enum SmtProofError {
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InvalidPathLength(usize),
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}
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#[cfg(feature = "std")]
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impl std::error::Error for SmtProofError {}
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impl fmt::Display for SmtProofError {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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use SmtProofError::*;
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match self {
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InvalidPathLength(path_length) => {
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write!(f, "Invalid Merkle path length. Expected {SMT_DEPTH}, got {path_length}")
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}
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}
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}
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}
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