• The Syscoin Ethereum Bridge

    An industry-first, zero counterparty bridge for moving tokens back and forth between the Syscoin and Ethereum blockchains

  • How it Works

    Token portability backed by cryptographic proofs. Move tokens back and forth between the Syscoin and Ethereum blockchains.

    Burn tokens on the Syscoin or Ethereum blockchain

    Burning tokens proveably removes them from the circulating supply on one chain. The proofs that result from this will be used to mint tokens on the adjacent chain.

    Mint tokens on the Ethereum or Syscoin blockchain

    Using the proof of burn from one chain, new tokens can be minted into the adjacent chain. This results in a 1:1 representation of the tokens on the new chain and empowers them with all the capabilities of that chain.

  • Bridge any SPT to an ERC20

    Move from Syscoin Platform Token to ERC20 in 3 simple steps


    Burn SPT

    Provably burn SPT on the Syscoin blockchain.


    Mint ERC20

    Use proof-of-burn from the Syscoin blockchain to mint ERC20 tokens on the Ethereum blockchain 1:1 with burned SPTs from Syscoin.


    Leverage Ethereum Ecosystem

    Use SPT ERC20 with Ethereum smart contracts and the plethora of existing wallets and services that support ERC20 tokens.

  • Bridge any ERC20 to an SPT

    Convert any ERC20 to a Syscoin Platform Token in 3 easy steps


    Burn SPT ERC20

    Provably burn ERC20 on the Ethereum blockchain.


    Mint SPT

    Use proof-of-burn from the Ethereum blockchain to mint SPT tokens on the Syscoin blockchain 1:1 with burned SPT ERC20s from Ethereum.


    Leverage Syscoin Ecosystem

    Use SPT on Syscoin for fast, scalable transactions and low transaction costs.

  • The Superblock Contract

    Linking blockchains through smart contracts

    A key concept of the Syscoin Ethereum bridge is called the Superblock Contract. This contract anchors block header data from the Syscoin chain onto the Ethereum blockchain creating a sidechain. The data within this sidechain is used to facilitate the minting of new SYSX ERC20 tokens.


    This sidechain is secured by Agents. This security layer incentivizes users with an opportunity to earn rewards and fees in both ETH and SYS for helping to secure the bridge.


    Check out the Superblock contract on Rinkeby testnet.

  • Bridge Agents

    Agents help to secure the Superblock contract while earning rewards and fees. It costs 3 ETH to run an Agent. Agents serve two primary roles- submitting block data to Ethereum and challenging bad submissions.

    Earn SYS for submitting Syscoin Superblock data to Ethereum

    Agents are responsible for collecting block header data from the Syscoin blockchain and grouping it into 'superblocks'. Each superblock contains 1 hour of Syscoin block headers. This approach reduces GAS costs for anchoring the block data on the Ethereum blockchain.


    Agents earn a SYS fee for all bridge transactions contained within the superblock they are submitting once it is accepted by the Superblock contract.

    Earn ETH by Challenging Agents submitting bad data

    Agents secure the Superblock contract by watching for superblock submissions by other Agents and challenging them if the data they are submitting does not match their own. This challenge results in a game, the loser of which loses their 3 ETH bond.