TRAIN Protocol Documentation

TRAIN’s HTLC contracts are deployed deterministically wherever possible (CREATE2 on EVM chains, native contract-ID determinism on Fuel), so all EVM chains share the same Train contract address. Deployment source of truth lives in the contracts repository — networks considered stable enough to be audited live on main, everything else is developed on its own main-add-<network> branch until it clears an audit. To learn how the TrainRouter powers gasless swaps, see Gasless Flows.

Mainnets
Testnets
Roadmap

Atomic Swap (HTLC) Contracts

EVM: Ethereum

Contract	Address	Explorer
Train	`0x877a7629BA8EfA6dd79057ab9105FdE3aDe93d75`	View

EVM: Arbitrum One

Contract	Address	Explorer
Train	`0x877a7629BA8EfA6dd79057ab9105FdE3aDe93d75`	View

EVM: OP Mainnet

Contract	Address	Explorer
Train	`0x877a7629BA8EfA6dd79057ab9105FdE3aDe93d75`	View

EVM: Base

Contract	Address	Explorer
Train	`0x877a7629BA8EfA6dd79057ab9105FdE3aDe93d75`	View

EVM: Polygon PoS

Contract	Address	Explorer
Train	`0x877a7629BA8EfA6dd79057ab9105FdE3aDe93d75`	View

EVM: BSC

Contract	Address	Explorer
Train	`0x877a7629BA8EfA6dd79057ab9105FdE3aDe93d75`	View

EVM: Robinhood

Contract	Address	Explorer
Train	`0x877a7629BA8EfA6dd79057ab9105FdE3aDe93d75`	View

CairoVM: Starknet

Contract	Address	Explorer
Train	`0x60111a1a10c8669c899ea74a7a155891887b3dd906e7f3eb912907cac50d66a`	View

FuelVM: Fuel Ignition

Contract	Address	Explorer
Train	`0x869027a726e61ee274e9612b8fbccafa7188e1d73f47dec76aeba4a778964b68`	View

Tempo

Contract	Address	Explorer
Train	`0xf37846fD2D6fAC5E4F7597463a1c4f30397A9e29`	View

Atomic Swap (HTLC) Contracts

EVM: Ethereum Sepolia

Contract	Address	Explorer
Train	`0x877a7629BA8EfA6dd79057ab9105FdE3aDe93d75`	View
TrainRouter	`0x0d117b12744E1A8b4980c3BdC3542Ad53C27E33a`	View
ConstantPayoutCurve	`0xFF9d783c6cB8294a4fa4d1556752c3EAF3E20DEE`	View

EVM: Arbitrum Sepolia

Contract	Address	Explorer
Train	`0x877a7629BA8EfA6dd79057ab9105FdE3aDe93d75`	View
TrainRouter	`0x0d117b12744E1A8b4980c3BdC3542Ad53C27E33a`	View
ConstantPayoutCurve	`0xFF9d783c6cB8294a4fa4d1556752c3EAF3E20DEE`	View

EVM: Base Sepolia

Contract	Address	Explorer
Train	`0x877a7629BA8EfA6dd79057ab9105FdE3aDe93d75`	View
TrainRouter	`0x0d117b12744E1A8b4980c3BdC3542Ad53C27E33a`	View
ConstantPayoutCurve	`0xFF9d783c6cB8294a4fa4d1556752c3EAF3E20DEE`	View

EVM: OP Sepolia

Contract	Address	Explorer
Train	`0x877a7629BA8EfA6dd79057ab9105FdE3aDe93d75`	View
TrainRouter	`0x0d117b12744E1A8b4980c3BdC3542Ad53C27E33a`	View
ConstantPayoutCurve	`0xFF9d783c6cB8294a4fa4d1556752c3EAF3E20DEE`	View

EVM: BSC Testnet

Contract	Address	Explorer
Train	`0x877a7629BA8EfA6dd79057ab9105FdE3aDe93d75`	View
TrainRouter	`0x0d117b12744E1A8b4980c3BdC3542Ad53C27E33a`	View
ConstantPayoutCurve	`0xFF9d783c6cB8294a4fa4d1556752c3EAF3E20DEE`	View

EVM: Linea Sepolia

Contract	Address	Explorer
Train	`0x877a7629BA8EfA6dd79057ab9105FdE3aDe93d75`	View
TrainRouter	`0x0d117b12744E1A8b4980c3BdC3542Ad53C27E33a`	View
ConstantPayoutCurve	`0xFF9d783c6cB8294a4fa4d1556752c3EAF3E20DEE`	View

EVM: Monad Testnet

Contract	Address	Explorer
Train	`0x877a7629BA8EfA6dd79057ab9105FdE3aDe93d75`	View
TrainRouter	`0x0d117b12744E1A8b4980c3BdC3542Ad53C27E33a`	View
ConstantPayoutCurve	`0xFF9d783c6cB8294a4fa4d1556752c3EAF3E20DEE`	View

EVM: Tron Nile

Contract	Address	Explorer
Train	`TKPCfMErMoBpr7YWcWJyNM2aG7EcAn6srj`	View
TrainRouter	`TY6hNw9Kvx6AcRJAAk9M9mCxZzuaSbQ3fG`	View
ConstantPayoutCurve	`TSHgwbab9XGjcGdQLdDAEQMgXy6QpnKE97`	View

Tempo Moderato

Contract	Address	Explorer
Train	`0xf37846fD2D6fAC5E4F7597463a1c4f30397A9e29`	View
ConstantPayoutCurve	`0xe07d9f773112388E0126B31611A4A56Cf6a9E3Fa`	View

CairoVM: Starknet Sepolia

Contract	Address	Explorer
Train	`0x4ae1ae0dd1dd01be306725ab8de15707241284c8dd49cbaf37bcf845bf2d20b`	View
TrainRouter	`0x1049d123293e9c182397ba1b5de795ee35c9ca0a1f2fecfec2eca14e38cecc8`	View
ConstantPayoutCurve	`0x27e92c85cf5da7861549ceba60096737a773f9b94f49046604ff0a0035cc351`	View

FuelVM: Fuel Sepolia

Contract	Address	Explorer
Train	`0x869027a726e61ee274e9612b8fbccafa7188e1d73f47dec76aeba4a778964b68`	View
ConstantPayoutCurve	`0xfc598e7d022590a0eecc2f58c9ba865ace7c2ca5acae881dced5f2dbb37eb33b`	View

SVM: Solana Devnet

Contract	Address	Explorer
Train	`2cQYFAiud2LBg3r6MxKPJ1oS83yyrRwDsgxQSwhL97LJ`	View
ConstantPayoutCurve	`Dp4ReoYGG8VRXpnst4vT8g6UDVwUicJwAuiikQWk8HMF`	View

Aztec Testnet

Contract	Address	Explorer
Train	`0x0483a6a15a6275c9482dbf8aa78aa96fe9291d60b08841a35739ebba4c33d9e6`	View
ConstantPayoutCurve	`0x0f39abe60a09d7750b0f3fc1dada72f151d815f10f63a4413db9a9e2cb5d2fc7`	View

Network	Status
TON	WIP
Stacks	WIP
Bitcoin	WIP
Sui	WIP
Aptos	WIP
XRP	WIP
Zcash	WIP

TRAIN Protocol

Deployments

Protocol Concepts

Resources

Deployments

Atomic Swap (HTLC) Contracts

Atomic Swap (HTLC) Contracts

​Atomic Swap (HTLC) Contracts

​Atomic Swap (HTLC) Contracts

Atomic Swap (HTLC) Contracts

Atomic Swap (HTLC) Contracts