CLI binaries, Rust crate surface, and on-chain instruction reference for paraloom-core.

API reference

There is no language SDK yet. A paraloom-sdk crate is on the roadmap (see Vision). Until it lands, the supported integration surfaces are: the paraloom CLI, the paraloom-core Rust workspace crates, and the on-chain Anchor program.

This page is a cross-reference, not a tutorial — for lifecycle docs see Architecture, Consensus, Privacy layer, Solana bridge, Compute layer.

Binary	Subcommands	Purpose
`paraloom`	`wallet`, `validator`, `compute`	Top-level operator + user CLI
`paraloom-node`	—	Validator daemon (alternative entry point)
`paraloom-ceremony-contribute`	—	Add randomness to MPC ceremony
`paraloom-ceremony-verify`	—	Verify a ceremony transcript
`paraloom-ceremony-finalize`	—	Extract proving keys from finalized transcript
`bridge_init`	—	Initialize the Solana bridge program
`register_validator`	—	One-shot on-chain validator registration

Rust crate surface

Until the SDK ships, you can use paraloom-core directly as a Cargo dependency. Note: The crate is not yet on crates.io; consume it as a git dependency pinned to a release tag.

[dependencies]
paraloom = { git = "https://github.com/paraloom-labs/paraloom-core.git", tag = "v0.5.0-rc2" }

`paraloom::privacy`

Cryptographic primitives + circuits for the shielded pool.

use paraloom::privacy::poseidon::{poseidon_hash, poseidon_hash_pair};
use paraloom::privacy::pedersen::pedersen_commit;
use paraloom::privacy::circuits::WithdrawalCircuit;
use paraloom::privacy::merkle::SparseMerkleTree;

Key functions:

	Where
Poseidon hash	`privacy::poseidon::poseidon_hash`, `poseidon_hash_pair`
Pedersen commit	`privacy::pedersen::pedersen_commit`
Sparse merkle tree	`privacy::merkle::SparseMerkleTree`
Withdrawal circuit	`privacy::circuits::WithdrawalCircuit`
Proof codec	`privacy::codec`
Batch verifier	`privacy::batch::BatchVerifier`

`paraloom::bridge`

Anchor program client + listener.

use paraloom::bridge::{BridgeClient, BridgeListener, ProgramVersion};

let client = BridgeClient::new(rpc_url, program_id, payer)?;
let sig    = client.deposit(amount_lamports, commitment).await?;
let sig    = client.withdraw(proof_bytes, nullifier, amount, recipient, expiration_slot).await?;

expiration_slot is mandatory and validated on-chain — see Solana bridge.

`paraloom::consensus`

Withdrawal BFT, reputation, slashing.

use paraloom::consensus::{
    WithdrawalVerificationCoordinator,
    ReputationTracker,
    SlashingEvidence,
    Vote,
};

You will normally not invoke these directly; the validator daemon owns them. They're public for tests and for embedding the cohort into a custom node.

`paraloom::network`

libp2p stack — Kademlia DHT, gossipsub, ping, request-response.

use paraloom::network::{NetworkClient, NetworkConfig};

// Bootstrap multiaddrs default to the on-chain validator registry —
// only set explicitly for isolated localnet runs.
let net = NetworkClient::start(NetworkConfig::from_settings(&settings)).await?;

`paraloom::storage`

RocksDB-backed merkle, nullifier, blockchain, and compute stores. fsync on hot writes is on by default.

use paraloom::storage::{MerkleStore, NullifierStore, ComputeStore};

On-chain program

Source: programs/paraloom/src/lib.rs.

declare_id!("DSysqF2oYAuDRLfPajMnRULce2MjC3AtTszCkcDv1jco");

pub fn deposit(ctx, amount: u64, commitment: [u8; 32]) -> Result<()>;
pub fn withdraw(
    ctx,
    proof: Vec<u8>,
    nullifier: [u8; 32],
    amount: u64,
    recipient: Pubkey,
    expiration_slot: u64,
) -> Result<()>;

pub fn register_validator(ctx, stake: u64) -> Result<()>;
pub fn unregister_validator(ctx) -> Result<()>;
pub fn slash_validator(ctx, validator: Pubkey, slash_percentage: u8) -> Result<()>;
pub fn update_merkle_root(ctx, new_root: [u8; 32]) -> Result<()>;

pub const MIN_VALIDATOR_STAKE: u64 = 1_000_000_000;   // 1 SOL

PDA seeds:

seeds = [b"nullifier", nullifier_bytes.as_ref()]   // NullifierPDA
seeds = [b"validator", validator.as_ref()]         // ValidatorAccount
seeds = [b"vault"]                                 // BridgeVault

Events: DepositEvent { commitment, amount, slot }, WithdrawEvent { nullifier, amount, recipient, slot }, ValidatorRegistered, ValidatorSlashed.

Errors:

Code	Meaning
`InvalidProof`	Groth16 verification failed
`NullifierSpent`	nullifier PDA already exists (double-spend)
`WithdrawalExpired`	`current_slot > expiration_slot`
`MerkleRootMismatch`	proof's public root doesn't match stored root
`StakeTooLow`	below `MIN_VALIDATOR_STAKE`
`Unauthorized`	caller is not the validator registry authority

Prometheus metrics

Each validator exposes Prometheus-format metrics on metrics.listen (default :9300). Full list and scrape config: Monitoring.

What's missing (and tracked)

paraloom-sdk crate (TypeScript + Rust friendly wrapper) — open issue
WebSocket event subscription — current events are polled via Solana RPC; a WS layer is on the roadmap
Stable rate-limit policy — devnet has none today; mainnet will define a policy

If you're building against the API right now, pin to a release tag and watch the changelog. The CLI surface is the most stable contract; crate-internal APIs may move between releases until the SDK ships.

API Reference

API reference

CLI binaries

`paraloom validator …`

`paraloom wallet …`

`paraloom compute …`