Skip to main content

​
Overview

Meridian supports multiple EVM networks with different levels of functionality for each network. This page documents the current network support and capabilities.

​
Contract Addresses

​
Mainnet

NetworkChain IDUSDCFacilitator
base84530x833589fCD6eDb6E08f4c7C32D4f71b54bdA029130x8E7769D440b3460b92159Dd9C6D17302b036e2d6
optimism100x0b2C639c533813f4Aa9D7837CAf62653d097Ff850x8E7769D440b3460b92159Dd9C6D17302b036e2d6
polygon1370x3c499c542cef5e3811e1192ce70d8cc03d5c33590x8E7769D440b3460b92159Dd9C6D17302b036e2d6
unichain1300x078d782b760474a361dda0af3839290b0ef57ad60x8E7769D440b3460b92159Dd9C6D17302b036e2d6
hyperevm9990xb88339CB7199b77E23DB6E890353E22632Ba630f0x8E7769D440b3460b92159Dd9C6D17302b036e2d6
megaeth43260xFAfDdbb3FC7688494971a79cc65DCa3EF82079E70x8E7769D440b3460b92159Dd9C6D17302b036e2d6

​
MegaETH Note

New MegaETH integrations should use the Permit2 flow:
  • Keep payTo set to the facilitator 0x8E7769D440b3460b92159Dd9C6D17302b036e2d6
  • Set paymentRequirements.asset to the ERC-20 token address the buyer will pay with. USDm is 0xFAfDdbb3FC7688494971a79cc65DCa3EF82079E7
  • Use Permit2 0x000000000022D473030F116dDEE9F6B43aC78BA3 as the approval target
  • Use x402ExactPermit2Proxy 0x402085c248EeA27D92E8b30b2C58ed07f9E20001 as the Permit2 spender
The USDm forwarder 0x2c2d8EF0664432BA243deF0b8f60aF7aB43a60B4 is deprecated and should be used only for legacy EIP-3009 compatibility.

​
Testnet

NetworkChain IDUSDCFacilitator
base-sepolia845320x036CbD53842c5426634e7929541eC2318f3dCF7e0x8e633dBf31adCc7D41BE3e95B7c8DD3526B5235A
fluent-testnet209940xa5544e6DDe3d8927Bf3bD9556e84f49067E36bAf0xB3Ac1B7871942bCdCD0bD6C65765272bBE70B8Da
optimism-sepolia111554200x5fd84259d66Cd46123540766Be93DFE6D43130D70x8e633dBf31adCc7D41BE3e95B7c8DD3526B5235A
Fluent testnet currently uses a mock USDC deployment, including function mint(to, amount) to receive test USDC.

​
Network Monitoring

  • Monitor network status via /v1/supported endpoint
  • Implement fallback logic for network outages
  • Cache network information with appropriate TTL