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Ethereum↔Polygon Bridge

Polygon brings you a trustless two-way transaction channel between Polygon and Ethereum by introducing the cross-chain bridge with Plasma and PoS security. With this users can transfer tokens across Polygon without incurring third-party risks and market liquidity limitations. The Plasma and PoS Bridge is available on both Mumbai as well as Mainnet.

Polygon bridge provides a scaling solution which is near-instant, low-cost, and quite flexible. Polygon uses a dual-consensus architecture(Plasma + Proof-of-Stake (PoS) platform) to optimise for speed and decentralisation. We consciously architected the system to support arbitrary state transitions on our sidechains, which are EVM-enabled.

There is no change to the circulating supply of your token when it crosses the bridge;

  • Tokens that leave the Ethereum network are locked and the same number of tokens are minted on Polygon as a pegged token (1:1).
  • To move the tokens back to the Ethereum network, tokens are burned on Polygon network and unlocked on Ethereum network during the process.

PoS vs Plasma

PoS Bridge(Recommended)Plasma Bridge
Short descriptionDApp Developers looking for flexibility and faster withdrawals with POS system security.DApp Developers looking for increased security guarantees with Plasma exit mechanism.
StructureHighly flexibleRigid, Less Flexible
Deposit(Ethereum → Polygon)22-30 mins22-30 mins
Withdrawal(Polygon → Ethereum)1 checkpoint = ~ 30 mins to 6 hoursCall to the process-exit procedure on Ethereum's contract
SecurityProof-of-Stake system, secured by a robust set of external validators.Polygon’s Plasma contracts piggybacks on Ethereum’s security.
Support StandardsETH, ERC20, ERC721, ERC1155 and OthersOnly ETH, ERC20, ERC721

Additional Resources