diff --git a/sdk/js/src/relayer/consts.ts b/sdk/js/src/relayer/consts.ts
index 9c0346db2..2fa9d3874 100644
--- a/sdk/js/src/relayer/consts.ts
+++ b/sdk/js/src/relayer/consts.ts
@@ -1,10 +1,17 @@
-import { ChainId, Network, ChainName, CHAIN_ID_TO_NAME,} from "../";
+import { ChainId, Network, ChainName, CHAIN_ID_TO_NAME } from "../";
 import { ethers } from "ethers";
-import { WormholeRelayer__factory, WormholeRelayer } from "../ethers-contracts/";
+import {
+  WormholeRelayer__factory,
+  WormholeRelayer,
+} from "../ethers-contracts/";
 
-type AddressInfo = {wormholeRelayerAddress?: string, mockDeliveryProviderAddress?: string, mockIntegrationAddress?: string}
+type AddressInfo = {
+  wormholeRelayerAddress?: string;
+  mockDeliveryProviderAddress?: string;
+  mockIntegrationAddress?: string;
+};
 
-const TESTNET: {[K in ChainName]?: AddressInfo} = {
+const TESTNET: { [K in ChainName]?: AddressInfo } = {
   bsc: {
     wormholeRelayerAddress: "0x80aC94316391752A193C1c47E27D382b507c93F3",
     mockDeliveryProviderAddress: "0x813AB43ab264362c55BF35A1448d0fd8135049a6",
@@ -30,9 +37,9 @@ const TESTNET: {[K in ChainName]?: AddressInfo} = {
     mockDeliveryProviderAddress: "0xBF684878906629E72079D4f07D75Ef7165238092",
     mockIntegrationAddress: "0x3bF0c43d88541BBCF92bE508ec41e540FbF28C56",
   },
-}
+};
 
-const DEVNET: {[K in ChainName]?: AddressInfo} = {
+const DEVNET: { [K in ChainName]?: AddressInfo } = {
   ethereum: {
     wormholeRelayerAddress: "0xE66C1Bc1b369EF4F376b84373E3Aa004E8F4C083",
     mockDeliveryProviderAddress: "0x1ef9e15c3bbf0555860b5009B51722027134d53a",
@@ -45,13 +52,53 @@ const DEVNET: {[K in ChainName]?: AddressInfo} = {
   },
 };
 
-const MAINNET: {[K in ChainName]?: AddressInfo} = {};
+const MAINNET: { [K in ChainName]?: AddressInfo } = {
+  ethereum: {
+    wormholeRelayerAddress: "0x27428DD2d3DD32A4D7f7C497eAaa23130d894911",
+  },
+  bsc: {
+    wormholeRelayerAddress: "0x27428DD2d3DD32A4D7f7C497eAaa23130d894911",
+  },
+  polygon: {
+    wormholeRelayerAddress: "0x27428DD2d3DD32A4D7f7C497eAaa23130d894911",
+  },
+  avalanche: {
+    wormholeRelayerAddress: "0x27428DD2d3DD32A4D7f7C497eAaa23130d894911",
+  },
+  fantom: {
+    wormholeRelayerAddress: "0x27428DD2d3DD32A4D7f7C497eAaa23130d894911",
+  },
+  klaytn: {
+    wormholeRelayerAddress: "0x27428DD2d3DD32A4D7f7C497eAaa23130d894911",
+  },
+  celo: {
+    wormholeRelayerAddress: "0x27428DD2d3DD32A4D7f7C497eAaa23130d894911",
+  },
+  acala: {
+    wormholeRelayerAddress: "0x27428DD2d3DD32A4D7f7C497eAaa23130d894911",
+  },
+  karura: {
+    wormholeRelayerAddress: "0x27428DD2d3DD32A4D7f7C497eAaa23130d894911",
+  },
+  moonbeam: {
+    wormholeRelayerAddress: "0x27428DD2d3DD32A4D7f7C497eAaa23130d894911",
+  },
+  arbitrum: {
+    wormholeRelayerAddress: "0x27428DD2d3DD32A4D7f7C497eAaa23130d894911",
+  },
+  optimism: {
+    wormholeRelayerAddress: "0x27428DD2d3DD32A4D7f7C497eAaa23130d894911",
+  },
+};
 
-export const RELAYER_CONTRACTS = {MAINNET, TESTNET, DEVNET};
+export const RELAYER_CONTRACTS = { MAINNET, TESTNET, DEVNET };
 
-export function getAddressInfo(chainName: ChainName, env: Network): AddressInfo {
+export function getAddressInfo(
+  chainName: ChainName,
+  env: Network
+): AddressInfo {
   const result: AddressInfo | undefined = RELAYER_CONTRACTS[env][chainName];
-  if(!result) throw Error(`No address info for chain ${chainName} on ${env}`);
+  if (!result) throw Error(`No address info for chain ${chainName} on ${env}`);
   return result;
 }
 
@@ -60,7 +107,10 @@ export function getWormholeRelayerAddress(
   env: Network
 ): string {
   const result = getAddressInfo(chainName, env).wormholeRelayerAddress;
-  if(!result) throw Error(`No Wormhole Relayer Address for chain ${chainName}, network ${env}`);
+  if (!result)
+    throw Error(
+      `No Wormhole Relayer Address for chain ${chainName}, network ${env}`
+    );
   return result;
 }
 
@@ -70,8 +120,12 @@ export function getWormholeRelayer(
   provider: ethers.providers.Provider | ethers.Signer,
   wormholeRelayerAddress?: string
 ): WormholeRelayer {
-  const thisChainsRelayer = wormholeRelayerAddress || getWormholeRelayerAddress(chainName, env);
-  const contract = WormholeRelayer__factory.connect(thisChainsRelayer, provider);
+  const thisChainsRelayer =
+    wormholeRelayerAddress || getWormholeRelayerAddress(chainName, env);
+  const contract = WormholeRelayer__factory.connect(
+    thisChainsRelayer,
+    provider
+  );
   return contract;
 }