Eigen Layer / Symbiotic ERC20 Vault

This section walks you through the creation of a Cross-Protocol ERC20 Vault, referred to as SuperERC20Vault. These vaults allow deposits to be split automatically between two underlying vaults: one built on EigenLayer and one on Symbiotic.

They are initialized via the initialize() function with a dedicated SuperVaultParams struct containing configuration data for both protocols, as well as vault-wide parameters.

function initialize(SuperVaultParams calldata _params) external;

This function deploys and initializes a new SuperERC20Vault, sets up the underlying Symbiotic and EigenLayer vaults, and assigns deposit distribution logic.

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Step-by-Step Vault Creation

1. Prepare Parameters (SuperVaultParams)

You must build a SuperVaultParams struct with the following components:

struct SuperVaultParams {
    IByzantineFactory.ByzVaultParams byzVaultParams;
    uint256 symRatio;
    IByzantineFactory.EigenParams eigenParams;
    IByzantineFactory.SymParams symParams;
    address curator;
}

byzVaultParams (type: ByzVaultParams)

Vault-level configuration shared by both underlying vaults. Includes role setup, deposit constraints, tokenization settings, etc.

Refer to the full ByzVaultParams documentation or to the 2. Construct the ByzVaultParams struct section.

symRatio (uint256)

Defines the percentage (from 0 to 10_000) of assets to route to the Symbiotic vault upon deposit.

• The remaining percentage (10_000 - symRatio) is allocated to the EigenLayer vault.

• Example: symRatio = 6000 means 60% of new deposits go to Symbiotic.

eigenParams (type: EigenParams)

Configuration for the EigenLayer vault's delegation logic, including operator delegation and role assignments.

Refer to the full 1. EigenParams documentation or to the 3. Configure EigenParams struct section.

symParams (type: SymParams)

Configuration for the Symbiotic vault: includes vault logic, delegator details, slasher behavior, and burner setup.

Refer to the full SymParams documentation or to the 3. Construct SymParams section.

curator (type: adress)

Address of the curator.

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2. Call the Factory Function

Prerequisites

• An Ethereum account (EOA) or smart contract that will act as the vault creator

• The token you want to use for the vault (must be supported by EigenLayer for EigenLayer vaults)

• Access to the Byzantine Factory contract address

Contract Addresses

Contract	Testnet Address	Mainnet Address
ByzantineFactory	0xe0f5fc7913C4aDC0975bD21d20DF7FC27360a267	Coming Soon

Installation

Byzantine SDK

System Requirements

• Node.js (v14 or higher)

• npm or yarn

• TypeScript (optional but recommended)

Installation Steps

1. Install the SDK

npm install @byzantine/vault-sdk

1. Create Environment File Create a .env file in your project root:

RPC_URL=https://holesky.infura.io/v3/your_api_key_here

# Choose ONE of the following authentication methods:
MNEMONIC=your_wallet_mnemonic
# OR
PRIVATE_KEY=your_wallet_private_key_without_0x_prefix

DEFAULT_CHAIN_ID=17000  # 17000 for Holesky testnet, 1 for Ethereum Mainnet, 560048 for Hoodi Testnet

1. Basic Setup

import {
  ByzantineClient,
  ETH_TOKEN_ADDRESS,
  BaseParams,
} from "@byzantine/vault-sdk";
import { ethers } from "ethers";
import * as dotenv from "dotenv";

dotenv.config();

const provider = new ethers.JsonRpcProvider(process.env.RPC_URL);
const wallet = ethers.Wallet.fromPhrase(process.env.MNEMONIC).connect(provider);
// OR const wallet = new ethers.Wallet(process.env.PRIVATE_KEY).connect(provider);

const client = new ByzantineClient({
  chainId: 17000, // 17000 for Holesky, 1 for Mainnet, 560048 for Hoodi
  provider: provider,
  signer: wallet,
});

Supported Networks

• Holesky Testnet (Chain ID: 17000)

• Ethereum Mainnet (Chain ID: 1) - Coming Soon

• Hoodi Testnet (Chain ID: 560048) - Coming Soon

SuperERC20ByzVault Creation

Create a Super Vault that integrates with the Symbiotic and Eigenlayer ecosystems:

With your SuperVaultParams ready, call:

function createSuperERC20Vault(
        ISuperERC20Vault.SuperVaultParams calldata _params
) external returns (address superVault);

Byzantine SDK

// // -
// All import and initialize client as shown on the setup
// -
// Define vault parameters

const baseParams = {
  metadata: {
    name: "SuperVault osETH",
    description: "A SuperVault for osETH with high yields",
  },

  token_address: networkConfig.osETHAddress, // osETH address

  is_deposit_limit: true,
  deposit_limit: ethers.parseUnits("1000000", 18), // 1M osETH (18 decimals)

  is_private: false, // Private SuperVault

  is_tokenized: true,
  token_name: "Byzantine osETH SuperVault",
  token_symbol: "bsosETHs",

  curator_fee: 600, // 6% (600 basis points)

  // Roles - replace with actual addresses in production
  role_manager: address,
  role_version_manager: address,
  role_deposit_limit_manager: address,
  role_deposit_whitelist_manager: address,
  role_curator_fee_claimer: address,
  role_curator_fee_claimer_admin: address,
};

const symbioticParams = {
  vault_version: 1,
  vault_epoch_duration: 604800, // 7 days in seconds
  slasher_type: SlasherType.VETO,
  slasher_veto_duration: 86400, // 1 day in seconds
  slasher_number_epoch_to_set_delay: 3,
  burner_delay_settings_applied: 21, // 21 days
  burner_global_receiver: "0x25133c2c49A343F8312bb6e896C1ea0Ad8CD0EBd", // Global receiver for wstETH
  burner_network_receiver: [],
  burner_operator_network_receiver: [],
  delegator_type: DelegatorType.NETWORK_RESTAKE,
  delegator_hook: "0x0000000000000000000000000000000000000001", // Delegator hook address
  delegator_operator: "0x0000000000000000000000000000000000000000", // Not used for NETWORK_RESTAKE
  delegator_network: "0x0000000000000000000000000000000000000000", // Not used for NETWORK_RESTAKE

  role_delegator_set_hook: address,
  role_delegator_set_network_limit: [address],
  role_delegator_set_operator_network_limit: [address],
  role_burner_owner_burner: address,
};

const eigenlayerParams = {
  // Eigenlayer specific params
  delegation_set_role_holder: address,
  operator: "0xb564e795f9877b416cd1af86c98cf8d3d94d760d", // Blockshard

  approver_signature_and_expiry: {
    signature: "0x", // null signature
    expiry: 0, // no expiry
  },
  approver_salt:
    "0x0000000000000000000000000000000000000000000000000000000000000000", // null salt
};

const ratio = 5000; // 50%
const curator = address;
// Create the vault
const tx = await client.createSuperVaultERC20({
  base: baseParams,
  symbiotic: symbioticParams,
  eigenlayer: eigenlayerParams,
  ratio: ratio,
  curator: curator,
});
// Wait for confirmation
const receipt = await tx.wait();
const vaultAddress = receipt.logs[0].address;
console.log(`Vault created at address: ${vaultAddress}`);

Forge

⏰  Coming soon

This deploys and initializes the super vault and the underlying Symbiotic and Eigenlayer vaults.

✅ You receive the new vault address. You can now whitelist stakers, set delegation limits, or start deposits.

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Summary

To create a SuperERC20Vault, all you need is:

1. The correct factory and beacon addresses

2. A fully populated SuperVaultParams struct

3. Call the ByzantineFactory

Once created, the vault handles deposit splitting, rebalancing, and cross-protocol coordination automatically.

For help with individual parameter structures, refer to:

• Byzantine Vault Parameters

• EigenLayer Parameters

• Symbiotic Parameters