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Shuffling for 32 bit platforms #7725

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Merged
merged 5 commits into from
Aug 6, 2025
Merged

Shuffling for 32 bit platforms #7725

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fb5450e
Fix shuffle_list to work on 32 bit platforms
ec2 Jul 9, 2025
e419687
ruint doesnt allow operations on u64 on 32 bit platforms
ec2 Jul 9, 2025
d9c8c1f
Merge branch 'unstable' into ec2/32-bit-support
ec2 Aug 1, 2025
8e8ca07
NODE_ID_BITS from u64 to u32
ec2 Aug 1, 2025
c33ffd0
Merge branch 'unstable' into ec2/32-bit-support
ec2 Aug 6, 2025
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3 changes: 1 addition & 2 deletions consensus/swap_or_not_shuffle/src/shuffle_list.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -96,8 +96,7 @@ pub fn shuffle_list(
loop {
buf.set_round(r);

let pivot = buf.raw_pivot() as usize % list_size;

let pivot = (buf.raw_pivot() % list_size as u64) as usize;
let mirror = (pivot + 1) >> 1;

buf.mix_in_position(pivot >> 8);
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4 changes: 2 additions & 2 deletions consensus/types/src/subnet_id.rs
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Expand Up @@ -11,7 +11,7 @@ const MAX_SUBNET_ID: usize = 64;

/// The number of bits in a Discovery `NodeId`. This is used for binary operations on the node-id
/// data.
const NODE_ID_BITS: u64 = 256;
const NODE_ID_BITS: u32 = 256;

static SUBNET_ID_TO_STRING: LazyLock<Vec<String>> = LazyLock::new(|| {
let mut v = Vec::with_capacity(MAX_SUBNET_ID);
Expand Down Expand Up @@ -102,7 +102,7 @@ impl SubnetId {
spec: &ChainSpec,
) -> impl Iterator<Item = SubnetId> {
// The bits of the node-id we are using to define the subnets.
let prefix_bits = spec.attestation_subnet_prefix_bits as u64;
let prefix_bits = spec.attestation_subnet_prefix_bits as u32;

let node_id = U256::from_be_slice(&raw_node_id);
// calculate the prefixes used to compute the subnet and shuffling
Expand Down