Where the protocol runs
| |
|---|
| Network | Stellar (currently Stellar testnet) |
| Settlement asset | USDC |
| Network fees | Covered through relayers |
Funding networks
| Network | Assets accepted | How it reaches your Stellar account |
|---|
| Stellar | USDC | Direct, to your Stellar wallet address |
| Base (Base Sepolia on testnet) | USDC | Send it to your personal Base deposit address. It is moved automatically through Circle CCTP, usually within a minute. Nothing to sign. |
How network fees are paid
You never pay network fees. They are covered through relayers:
| Network | Who submits and pays |
|---|
| Stellar | OpenZeppelin Relayer Channels, with a BlockFinaX fee account as the fallback |
| Base | Coinbase's paymaster first; Pimlico's paymaster takes over automatically if Coinbase is unavailable or declines |
Contract addresses
Two earlier pool contracts are closed to new money and remain only to settle their existing contracts and pay out withdrawals: CBW3IIXTRK4PQWHA5ACZAFX6FLE5T4H3DKWY7NK3EMZFTQPB4GPBVK4C with oracle CBI7V33DPNS7IIAG7M5ACJZEHQFFX4FNGYABASEFTLQ2WAOMYKLG4ZXX, and CC56AAARBPSBMOWEUFZGXR56HS5J5HBJMJRX6RZGG4NCJN3D2ID3MRZO with oracle CBQ2J5YKMVN6DLUMHNT5LYRT5NKDDFRPYLMVYT3OTQ2YMMTYIFMVZ3OW.
Each address opens on Stellar Expert.
Base Sepolia contracts (testnet)
| Contract | Address |
|---|
| BlockFinaX deposit factory | 0x05672D3bD02b1ebBFA6F4f5C104A7f2b7d0a2291 |
| BlockFinaX deposit logic (every deposit address runs this) | 0x937a715805Bd525CBBF2817f5Eb184a322D7016c |
| USDC (Circle test token) | 0x036CbD53842c5426634e7929541eC2318f3dCF7e |
| Circle TokenMessengerV2 | 0x8FE6B999Dc680CcFDD5Bf7EB0974218be2542DAA |
| Circle MessageTransmitterV2 | 0xE737e5cEBEEBa77EFE34D4aa090756590b1CE275 |
View them on BaseScan (Sepolia).
Circle CCTP on Stellar (testnet)
| Contract | Address |
|---|
| CctpForwarder | CA66Q2WFBND6V4UEB7RD4SAXSVIWMD6RA4X3U32ELVFGXV5PJK4T4VSZ |
| TokenMessengerMinter | CDNG7HXAPBWICI2E3AUBP3YZWZELJLYSB6F5CC7WLDTLTHVM74SLRTHP |
| MessageTransmitter | CBJ6MTCKKZG73PMDZCJMSFRD7DQEMI4FKDH7CGDSV4W6FHCRBCQAVVJY |