Core architecture and design of the Trails transaction rails protocol
Trails offers developers a solution to enable 1-click crypto experiences via any wallet, token and chain. Trails aims to make “Ethereum work as one” by solving the widespread chain and liquidity fragmentation problems by providing a multi-chain transaction orchestration layer on top of wallets that unifies all chains and automates token routing, all with a single end-user confirmation (1-click).
Trails automatically determines the optimal path for cross-chain transaction execution, whether it’s a simple single-chain transaction or a complex multi-step orchestration involving swaps, bridges, and executions across different blockchains.Trails is built on the Sequence v3 stack combining the powers of account abstraction, real-time indexing, and gasless transaction execution into an intent-powered chain abstraction solution. Trails is designed to work with any wallet, including a simple EOA wallet, a powerful smart wallet or an in-app embedded wallet (ie. MetaMask, Wallet Connect, Privy, Coinbase Smart Wallet, …). For more details under-the-hood, please see the protocol architecture section.The protocol is designed to be extensible, with plans to support non-EVM chains in the future.
Create a payment transaction for any chain in any tokenUsers begin by defining their payment intent - whether it’s a mint, deposit, swap, or any other transaction type. This intent can be created for any supported blockchain using any supported token.
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Trails Inspects
Determines if orchestration is neededTrails’s intelligent orchestration engine analyzes the defined intent to determine the optimal execution path:
Pass Through: If the transaction can succeed without orchestration (same chain, sufficient balance, etc.), it passes through directly
Continue Orchestrating: If cross-chain operations or token swaps are needed, the system continues to the orchestration process
This inspection happens in milliseconds and considers factors like:
Available token balances
Gas requirements
Chain compatibility
Protocol availability
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Select Route
Trails suggests optimal routing optionsWhen orchestration is required, Trails analyzes available routes across chains and presents the optimal options:
Automated Suggestions: The system suggests the most efficient token and chain combinations
User Customization: Users can review and customize the suggested route
Cost Analysis: Each route option includes gas costs, fees, and estimated execution time
Users maintain full control over the routing decision while benefiting from Trails’s optimization algorithms.
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Orchestrate Payment
Intelligently combine operations for the selected routeOnce the route is confirmed, Trails orchestrates the necessary operations:
Swap Operations: Convert tokens to the required format
Bridge Transactions: Move assets between chains when needed
Execution Preparation: Set up the final transaction parameters
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Execute Transaction
User confirms and completes the end-to-end flowThe final step puts control back in the user’s hands:
Wallet Confirmation: User reviews and confirms the transaction through their connected wallet
End-to-End Execution: Trails executes the complete orchestrated flow
Transaction Completion: The system handles all intermediate steps and delivers the final result
Users only need to sign once, but Trails may execute multiple transactions behind the scenes to complete the orchestrated payment.