Network Reference

Quick reference for all active Kusama Shield contract deployments.

Active Deployments

Polkadot AssetHub — Mainnet (`420420419`)

Contract	Address
Shield Pool V7	`0x0D694Da746e73D1e255c1894F90e38170db45809`
ZK Verifier	`0x6A13781E43AEA21918120CD0E7a2ed8614c01e14`
Poseidon Hasher	`0xB8F0C6679D6Cc56450470522Bd96573C3D615052`
Deployment Block	`18460000`

Paseo AssetHub — Testnet (`420420417`)

Contract	Address
Shield Pool V7	`0xbcE09D4De052b2816df1285663ac89528DF45380`
ZK Verifier	`0xcA4cBc5d31eccd08d393C43aF492F729FF30b685`
Poseidon Hasher	`0x1d165f6fE5A30422E0E2140e91C8A9B800380637`
Deployment Block	`11273491`

Kusama AssetHub — Mainnet (`420420418`)

Contract	Address
Shield Pool V5	`0x625159459EB6C50C4F4b126A955B18d5c4DCA573`
ZK Verifier	`0x66988131CFfd10d2804ffaC93Ac302D0886D7829`
Deployment Block	`0`

RPC Endpoints

Network	HTTP (EVM)	WSS (Substrate)
Polkadot AH	`https://polkadot-assethub-rpc.laissez-faire.trade`	`wss://asset-hub-polkadot-rpc.polkadot.io`
Polkadot AH (alt)	`https://eth-rpc.polkadot.io/`	—
Paseo AH	`https://paseo-assethub-rpc.laissez-faire.trade`	`wss://asset-hub-paseo-rpc.n.dwellir.com`
Kusama AH	`https://kusama-rpc.laissez-faire.trade`	`wss://kusama-asset-hub-rpc.polkadot.io`
Kusama AH (alt)	`https://eth-rpc-kusama.polkadot.io/`	—

Block Explorers

Network	URL
Polkadot AH	`https://blockscout.polkadot.io/`
Paseo AH	`https://testnet.routescan.io/`
Kusama AH	`https://blockscout-kusama.polkadot.io/`

V7 ABI Reference

// Deposit
function depositNative(bytes32 commitment) external payable
function depositAsset(uint256 assetId, uint256 amount, bytes32 commitment) external
function depositAssetDirect(uint256 assetId, uint256 amount, bytes32 commitment) external

// Withdraw
function withdraw(uint256[2] pA, uint256[2][2] pB, uint256[2] pC, uint[8] pubSignals, address recipient) external
function proxy_withdraw(uint256[2] pA, uint256[2][2] pB, uint256[2] pC, uint[8] pubSignals, address recipient) external

// Queries
function currentRoot() external view returns (uint256)
function treeSize() external view returns (uint256)
function getEscrowBalance(address) external view returns (uint256)
function isNullifierSpent(bytes32) external view returns (bool)
function isKnownRoot(uint256) external view returns (bool)
function verifier() external view returns (address)

// Events
event Deposit(address indexed asset, bytes32 commitment)

V7 Public Signals

pubSignals = [
  newCommitmentHash,       // [0] Change commitment in tree
  existingNullifierHash,   // [1] Marks spent deposit
  contextHash,             // [2] Replay protection
  withdrawnValue,          // [3] Amount withdrawn
  treeDepth,               // [4] = 128
  context,                 // [5] Chain-specific binding
  root,                    // [6] Merkle tree root
  asset,                   // [7] Asset precompile address
]

Proof Format (Groth16)

// pi_a: [bigint, bigint]                              — 2 elements
// pi_b: [[bigint, bigint], [bigint, bigint]]          — 2×2, transposed for Solidity
// pi_c: [bigint, bigint]                              — 2 elements

The pi_b matrix is transposed — [[b[0][1], b[0][0]], [b[1][1], b[1][0]]] — matching the snarkJS Solidity verifier convention.

Circuit Artifacts

File	Purpose
`withdraw_phase2_fixed_v7.wasm`	Witness calculator
`withdraw_phase2_fixed_v7_0001.zkey`	Proving key
`withdraw_phase2_fixed_v7.circom`	Circuit source

Deprecated Addresses

These addresses are no longer in use — do not interact with them:

Contract	Address	Issue
Old Polkadot Pool	`0x6f54d64C5619363722e4D1E4E53176F7f2FD57bf`	Used incompatible bn254_x5 hasher
Old Polkadot Hasher	`0x66988131CFfd10d2804ffaC93Ac302D0886D7829`	Mismatched ZK circuit constants
Old Paseo Pool (V3)	`0x3099889C1538f0200B831181cbfb532a4e9A418F`	Pre-V7 circuit

BN254 Field Modulus

21888242871839275222246405745257275088548364400416034343698204186575808495617

All Poseidon hashing, Merkle tree arithmetic, and Groth16 proofs operate in this field.

SDK

npm install @kusamashield/shielded-transfers@0.1.4

See Integrate via the SDK for usage instructions.

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