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+# 📝 Trustless Architecture Cross Chain Bridge
+
+## **🚀 1. Proposed Solution for USDC Cross-Chain Integration Using Albridge (Stellar Asset Bridge).**
+
+### Overview
+
+The proposed solution leverages Allbridge, a decentralized bridging protocol, to enable seamless transfer of USDC between other blockchain networks (e.g., Ethereum, Solana, XRPL, Tezos) and  Stellar’s Soroban smart contracts. Using Allbridge’s lock-mint/burn-release mechanism and validator network, the architecture ensures secure and scalable cross-chain communication while maintaining decentralization.
+
+
+### Alignment with Trustless Work.
+
+Allbridge is a stellar asset bridge that connects Stellar with multiple blockchain networks. It supports various asset types, it is used by projects like Chrysalis for cross-chain functionality and  it has an excellent developer [support system](https://discord.gg/KuN6sFTq). This makes Allbridge an excellent choice to be used with Trustless work.
+
+This solution aligns with Trustless Work’s vision by:
+- Enabling trustless multichain capabilities.
+- Reducing complexity by leveraging Allbridge’s established infrastructure.
+- Supporting scalability and seamless integration with future blockchain ecosystems.
+
+
+### Core Components.
+
+Using Allbridge Classic provides the following options:
+- lock USDC on BNB Chain and unlock abUSDC on Stellar.
+- lock cUSD on Celo and unlock acUSD on Stellar.
+- lock USDC on Ethereum and unlock aeUSDC on Stellar
+- lock USDC on Polygon and unlock apUSDC on Stellar
+- lock USDC on Solana and unlock asUSDC on Stellar
+
+
+If the interest of a developer is a backward transfer, there will be a need to get abUSDC, acUSD, aeUSDC, apUSDC, and asUSDC on Stellar first, this is in case of working with native USDC on Stellar.
+
+
+#### Lock & Mint Mechanism:
+
+**🚀 Lock & Mint Contract (Source Blockchain):**
+
+```
+Original Asset (Chain A) -> Locked in Bridge -> Wrapped Asset (Stellar)
+```
+
+It's a simple transfer to the bridge muxedAccount . Attached is a link to the different bridge address.  [Learn more here](https://docs.allbridge.io/allbridge-overview/bridge-contracts) & [this too](https://github.com/allbridge-io/allbridge-contract-docs?tab=readme-ov-file#lock-tokens-1).
+
+
+##### For other blockchains (EVM ) :
+- Call lock method with the [contract address](https://docs.allbridge.io/allbridge-overview/bridge-contracts) and [ABI](https://github.com/allbridge-io/allbridge-contract-docs/blob/master/allbridge-multisig-abi.json)
+
+```solidity
+function lock(uint128 lockId, address tokenAddress, bytes32 recipient, bytes4 destination, uint256 amount)
+```
+
+
+
+#### Burn & Release Mechanism:
+
+**🚀 Burn & Release Contract (Stellar via Soroban):**
+
+```
+Wrapped Asset (Stellar) -> Burned -> Original Asset (Chain A)
+```
+
+At this time of research, currently the functionality for Allbridge to send tokens to a smart contract and not an address is still under development. 
+What Allbridge currently has is the ability to send it directly to a stellar address. To know more about how it is being done, kindly [check this out](https://github.com/allbridge-io/allbridge-contract-docs?tab=readme-ov-file#stellar-1).
+
+**PS:**
+- It is important to note that if this is to be done, a trustline for the bridge token needs to be set for the stellar address before sending it.
+
+
+To study more about sending into the soroban smart contract, this is a link to Allbridge soroban [smart contract](https://github.com/allbridge-io/allbridge-core-soroban-contracts/tree/main)
+
+
+
+**PS**: [encodeEd25519PublicKey](https://stellar.github.io/js-stellar-sdk/StrKey.html#.encodeEd25519PublicKey) and [decodeEd25519PublicKey](https://stellar.github.io/js-stellar-sdk/StrKey.html#.decodeEd25519PublicKey) from [StellarSdk](https://github.com/stellar/js-stellar-base) are used to encode and decode stellar addresses.
+
+
+
+### Security Considerations:
+
+- Multi-signature validation
+- Oracle-based verification
+
+
+
+### More Resources:
+-  [Allbridge Core Stellar guide](https://docs-core.allbridge.io/sdk/guides/stellar/transfer)
+-  [Allbridge Core JS-SDK](https://github.com/allbridge-io/allbridge-core-js-sdk/blob/main/examples/src/examples/bridge/srb/srb-send-full-example.ts)
+-  [Allbridge Core REST-API](https://github.com/allbridge-io/allbridge-core-rest-api/blob/master/examples/src/usage/bridge/srb/srb-send-full-example.ts)
+-  [Allbridge smart contracts addresses](https://docs.allbridge.io/allbridge-overview/bridge-contracts#stellar-bridge-contracts)
+-  [Signatures.](https://allbridgeapi.net/sign/%7BtransactionId%7D)
+-  [Albridge ABI’s](https://github.com/allbridge-io/allbridge-contract-docs/blob/master/allbridge-multisig-abi.json)
+-  [Bridge contract address on stellar](https://stellar.expert/explorer/public/account/GALLBRBQHAPW5FOVXXHYWR6J4ZDAQ35BMSNADYGBW25VOUHUYRZM4XIL)
+
+
+
+
+
+
+## **🚀 2. Proposed Solution for USDC Cross-Chain Bridge Using Circle (Stellar’s Anchor).**
+
+
+### Overview
+Circle provides cross-chain USDC transfer capabilities through their Cross-Chain Transfer Protocol (CCTP), allowing users to move USDC between supported blockchains.   Circle is a steller's [anchor](https://anchors.stellar.org/?s=circle).
+
+
+### How Circle Cross-Chain Works:
+
+**Transfer Process:**
+
+```
+Source Chain (Burn) -> Circle Attestation -> Destination Chain (Mint)
+```
+
+-  Source Chain: User initiates transfer
+-  Message Transmission: Circle's attestation service validates transfer
+-  Destination Chain: USDC is minted on target network
+
+
+### Technical Limitation
+Currently, circle only works with API endpoints, it provides several key endpoints for cross-chain transfers:
+
+- Transfer initiation
+- Status checking
+- Attestation verification
+- Destination minting
+
+
+### Resource:
+
+- [Circle's CCTP Documentation](https://developers.circle.com/stablecoins/docs/cctp-getting-started)
+
+
+
+
+## Next Steps
+Upon acceptance:
+- If required, I will Design architecture diagrams to illustrate blockchain-specific workflows.
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