1use super::{
 2    hash::rpo::{Rpo256, RpoDigest},
 3    utils::collections::{vec, BTreeMap, BTreeSet, Vec},
 4    Felt, StarkField, Word, WORD_SIZE, ZERO,
 5};
 6use core::fmt;
 7
 8// REEXPORTS
 9// ================================================================================================
10
11mod empty_roots;
12pub use empty_roots::EmptySubtreeRoots;
13
14mod index;
15pub use index::NodeIndex;
16
17mod merkle_tree;
18pub use merkle_tree::MerkleTree;
19
20mod path;
21pub use path::{MerklePath, RootPath, ValuePath};
22
23mod path_set;
24pub use path_set::MerklePathSet;
25
26mod simple_smt;
27pub use simple_smt::SimpleSmt;
28
29mod mmr;
30pub use mmr::{Mmr, MmrPeaks};
31
32mod store;
33pub use store::MerkleStore;
34
35// ERRORS
36// ================================================================================================
37
38#[derive(Clone, Debug, PartialEq, Eq)]
39pub enum MerkleError {
40    ConflictingRoots(Vec<Word>),
41    DepthTooSmall(u8),
42    DepthTooBig(u64),
43    NodeNotInStore(Word, NodeIndex),
44    NumLeavesNotPowerOfTwo(usize),
45    InvalidIndex(NodeIndex),
46    InvalidDepth { expected: u8, provided: u8 },
47    InvalidPath(MerklePath),
48    InvalidEntriesCount(usize, usize),
49    NodeNotInSet(u64),
50    RootNotInStore(Word),
51}
52
53impl fmt::Display for MerkleError {
54    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
55        use MerkleError::*;
56        match self {
57            ConflictingRoots(roots) => write!(f, "the merkle paths roots do not match {roots:?}"),
58            DepthTooSmall(depth) => write!(f, "the provided depth {depth} is too small"),
59            DepthTooBig(depth) => write!(f, "the provided depth {depth} is too big"),
60            NumLeavesNotPowerOfTwo(leaves) => {
61                write!(f, "the leaves count {leaves} is not a power of 2")
62            }
63            InvalidIndex(index) => write!(
64                f,
65                "the index value {} is not valid for the depth {}", index.value(), index.depth()
66            ),
67            InvalidDepth { expected, provided } => write!(
68                f,
69                "the provided depth {provided} is not valid for {expected}"
70            ),
71            InvalidPath(_path) => write!(f, "the provided path is not valid"),
72            InvalidEntriesCount(max, provided) => write!(f, "the provided number of entries is {provided}, but the maximum for the given depth is {max}"),
73            NodeNotInSet(index) => write!(f, "the node indexed by {index} is not in the set"),
74            NodeNotInStore(hash, index) => write!(f, "the node {:?} indexed by {} and depth {} is not in the store", hash, index.value(), index.depth(),),
75            RootNotInStore(root) => write!(f, "the root {:?} is not in the store", root),
76        }
77    }
78}
79
80#[cfg(feature = "std")]
81impl std::error::Error for MerkleError {}
82
83// HELPER FUNCTIONS
84// ================================================================================================
85
86#[cfg(test)]
87const fn int_to_node(value: u64) -> Word {
88    [Felt::new(value), ZERO, ZERO, ZERO]
89}