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Documentation Index

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Compose.Market supports multiple EVM chains with a unified Smart Account experience. Users get the same Smart Account address across all supported chains through deterministic CREATE2 deployment.

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Cross-Chain Identity

The key innovation is universal Smart Account addresses. A user who creates a Smart Account on Avalanche Fuji will have the exact same address on Cronos Testnet.

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How It Works

The Smart Account address is derived from: 
address = CREATE2(factory, keccak256(admin, salt), initCodeHash)
Since we deploy the same AccountFactory at the same address on all chains, users automatically get identical Smart Account addresses.
ComponentRequirementAddress
AccountFactoryUniversal0x4bE0ddfebcA9A5A4a617dee4DeCe99E7c862dceb
EntryPoint v0.7Universal0x0000000071727De22E5E9d8BAf0edAc6f37da032
Account ImplementationChain-specificVaries per chain
PaymasterChain-specificVaries per chain

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Cronos Testnet Deployment

Cronos Testnet lacks a native ERC-4337 bundler, so we deployed the full AA infrastructure ourselves using CREATE2 to match ThirdWeb’s universal addresses.

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Deployment Method

We extracted the deployment parameters from the original Ethereum mainnet transaction and replayed them on Cronos:
  1. Find original deployment tx on Etherscan/Blockscout
  2. Extract CREATE2 salt (first 32 bytes of input data)
  3. Extract init code (remaining bytes)
  4. Call Arachnid’s CREATE2 deployer (0x4e59b44847b379578588920cA78FbF26c0B4956C)
This produces identical addresses on any EVM chain where Arachnid’s deployer exists.

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Deployed Contracts

ContractAddressNotes
EntryPoint v0.70x0000000071727De22E5E9d8BAf0edAc6f37da032Universal
AccountFactory0x4bE0ddfebcA9A5A4a617dee4DeCe99E7c862dcebUniversal
Account Implementation0x94eC38a5d2EDA5A543Ab4c08D998338D4082beb2Chain-specific
SimplePaymaster0xA7c85b07aBE6eE06Cd2f1268Ea22d7156C7A67D4Chain-specific

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Supported Chains

ChainChain IDAA SupportPayment
Avalanche Fuji43113ThirdWeb Bundlerx402
Cronos Testnet338Custom (api bundler)x402 + Facilitator

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Account Registration Flow

When a user connects on Cronos Testnet:

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API Endpoints

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POST /api/aa/prepare

Prepare a UserOperation for signing.

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POST /api/aa/submit

Submit a signed UserOperation for execution.

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POST /api/aa/register-cronos

Deploy a Smart Account on Cronos (if not already deployed).

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Key Files

ComponentLocation
UserOp constructionbackend/api/shared/aa/userop.ts
Paymaster signingbackend/api/shared/aa/paymaster.ts
Frontend AA clientapp/src/lib/cronos/aa.ts
Cronos Facilitatorbackend/api/shared/config/cronos.ts

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Value for Cronos Ecosystem

This work provides production-ready ERC-4337 v0.7 infrastructure for Cronos Testnet:
  • Universal AccountFactory: Same address as Ethereum, Fuji, and other chains
  • EntryPoint v0.7: Latest standard with PackedUserOperation support
  • Gasless transactions: SimplePaymaster for gas sponsorship
  • Cross-chain identity: Users keep the same Smart Account address
Developers building on Cronos can reuse these contracts or follow the same CREATE2 deployment pattern.