t3rn is expanding its cross-chain settlement network to Flow, unlocking ultra-efficient TRN-enabled execution on one of the most scalable and developer-friendly blockchain infrastructures. TRN is now deployed on Flow at 0xC5195B74d6D5176efc5eB940B07f02Dc3fA8d5d5, enabling seamless on-chain settlement, incentives, and coordination within the Flow ecosystem and beyond.

Why Flow? Performance, Composability & Cost

Flow offers a cutting-edge multi-node architecture that separates consensus, execution, verification, and collection roles—a design optimized for high throughput without compromising decentralization. This allows Flow to target up to one million TPS, with consistent finality and composability across smart contracts

EVM compatibility on Flow brings powerful benefits:

• Ultra-low transaction fees (≈ $0.000179 per txn)

• Sub-second (~0.8s) block times, improving UX and confirmation speed

This all combines into a uniquely efficient EVM execution platform—ideal for t3rn’s low-friction cross-chain settlement layer.

Cost Breakdown – Flow

Initial observations on the settlement costs with Flow are very promising. We’ve limited the first settings of the protocol fees to the minimum, adjusting the percentage costs of execution to an approximate maximum of 0.01% of the value transferred.

We’re setting the initial gas price limit taken into calculating the executor’s fees & protocol fees for fail-safe claims and refunds as follows:

Interpretation:

• Gas cost per tx is effectively zero—in the nanodollar range.

• Protocol fees (~$0.00375) are modest and dominate the cost when scaled.

• Both are vastly lower than conventional gas expectations on EVM networks, reinforcing Flow’s economic efficiency.
  
  
  

  

Executor Setup for Flow + TRN Support

No changes are needed in your executor logic. The transmitter architecture used by it supports both transaction types. Simply enable Flow and its native asset with:

• export EXECUTOR_ENABLED_NETWORKS="t3rn,optimism,binance,linea,base,arbitrum,flow,unichain,hyperevm"

• export EXECUTOR_ENABLED_ASSETS="eth,bnb,trn,flow,hyper"

Once updated, your executor is ready for Flow-based settlements and seamless TRN/FLOW asset handling.

Key Takeaways

• Flow is ultra cost-efficient for t3rn cross-chain, with gas effectively free and protocol fees under a cent—making Flow an extremely compelling network to settle on.

• Predictable and minimal costs unlock novel execution models like real-time settlements or per-order finalizations without cost overhead.

• Flow’s architecture and EVM compatibility bring compounding benefits: Stellar throughput, low cost, composability, and developer familiarity—supercharging t3rn’s cross-chain infrastructure with Flow’s performance.

Stay in the Flow!