Polygon Native Bridge (polygon-bridge)

Official Polygon PoS bridge via RootChainManager. Supports ETH, ERC-20, ERC-721, and ERC-1155 deposits with checkpoint-based withdrawals.

Fact	Value
Category	Bridges
Family	none
Namespace	`PolygonBridge` on ethereum, polygon
Chains	ethereum, polygon

Notes

L1 to L2 deposits via RootChainManager. L2 to L1 withdrawals require burning tokens on Polygon, then calling exit() on L1 with the burn proof
Approval target for ERC-20: approve tokens to the ERC20Predicate (0x40ec5B...), NOT the RootChainManager
depositData for ERC-20 is abi.encode(amount) — the amount encoded as a 32-byte uint256
ETH deposits are received as WETH on Polygon (Polygon’s native token is MATIC)
L1 to L2 deposits finalize after the next Polygon checkpoint (~30-60 minutes)
L2 to L1 withdrawals require checkpoint inclusion + exit() call on Ethereum (~3 hours for checkpoint)
Supports ERC-20, ERC-721, and ERC-1155 via different predicate contracts
Canonical bridge, secured by the Polygon PoS validator set

On Ethereum, PolygonBridge is a namespace: its contracts need no import.

function main() {
  // Ethereum's erc20Predicate, `0x40ec5B33f54e0E8A33A975908C5BA1c14e5BbbDf`.
  require(PolygonBridge.Erc20Predicate != 0);
}

Chain	Contract	Address	In a program
Ethereum	erc20Predicate	`0x40ec5B33f54e0E8A33A975908C5BA1c14e5BbbDf`	`PolygonBridge.Erc20Predicate`
Ethereum	etherPredicate	`0x8484Ef722627bf18ca5Ae6BcF031c23E6e922B30`	`PolygonBridge.EtherPredicate`
Ethereum	rootChainManager	`0xA0c68C638235ee32657e8f720a23ceC1bFc77C77`	`PolygonBridge.RootChainManager`
Polygon	childChainManager	`0xA6FA4fB5f76172d178d61B04b0ecd319C5d1C0aa`	`PolygonBridge.ChildChainManager`

import PolygonRootChainManagerABI from "./protocols/polygon-bridge/PolygonRootChainManagerABI.json"; Speaks for: rootChainManager.