diff --git a/src/_test/config.ts b/src/_test/config.ts
index 853bcb7..1fded91 100644
--- a/src/_test/config.ts
+++ b/src/_test/config.ts
@@ -1,7 +1,6 @@
 import { mock } from '@wagmi/connectors'
-import { mainnet as viem_mainnet } from 'viem/chains'
+import { base as viem_base, mainnet as viem_mainnet } from 'viem/chains'
 import { type Config, createConfig, http } from 'wagmi'
-import { base as opWagmiBase } from '../constants/chains/base.js'
 import { accounts } from './constants.js'
 import { getRpcUrls } from './utils.js'
 
@@ -17,7 +16,7 @@ const mainnet = {
 }
 
 const base = {
-  ...opWagmiBase,
+  ...viem_base,
   ...getRpcUrls({ port: 8546 }),
   // fork: {
   //   blockNumber: process.env.VITE_OPTIMISM_FORK_BLOCK_NUMBER
diff --git a/src/constants/chains/base.ts b/src/constants/chains/base.ts
deleted file mode 100644
index 82f5349..0000000
--- a/src/constants/chains/base.ts
+++ /dev/null
@@ -1,15 +0,0 @@
-import { baseAddresses } from 'op-viem/chains'
-import { base as viem_base, type Chain, mainnet } from 'viem/chains'
-
-export const base: Chain = {
-  ...viem_base,
-  contracts: {
-    ...viem_base.contracts,
-    l1StandardBridge: {
-      [mainnet.id]: {
-        address: baseAddresses.l1StandardBridge.address,
-        blockCreated: baseAddresses.l1StandardBridge.blockCreated,
-      },
-    },
-  },
-}
diff --git a/src/constants/chains/optimism.ts b/src/constants/chains/optimism.ts
deleted file mode 100644
index 1af639e..0000000
--- a/src/constants/chains/optimism.ts
+++ /dev/null
@@ -1,15 +0,0 @@
-import { optimismAddresses } from 'op-viem/chains'
-import { type Chain, mainnet, optimism as viem_optimism } from 'viem/chains'
-
-export const optimism: Chain = {
-  ...viem_optimism,
-  contracts: {
-    ...viem_optimism.contracts,
-    l1StandardBridge: {
-      [mainnet.id]: {
-        address: optimismAddresses.l1StandardBridge.address,
-        blockCreated: optimismAddresses.l1StandardBridge.blockCreated,
-      },
-    },
-  },
-}
diff --git a/src/constants/chains/zora.ts b/src/constants/chains/zora.ts
deleted file mode 100644
index 9e94213..0000000
--- a/src/constants/chains/zora.ts
+++ /dev/null
@@ -1,15 +0,0 @@
-import { zoraAddresses } from 'op-viem/chains'
-import { type Chain, mainnet, zora as viem_zora } from 'viem/chains'
-
-export const zora: Chain = {
-  ...viem_zora,
-  contracts: {
-    ...viem_zora.contracts,
-    l1StandardBridge: {
-      [mainnet.id]: {
-        address: zoraAddresses.l1StandardBridge.address,
-        blockCreated: zoraAddresses.l1StandardBridge.blockCreated,
-      },
-    },
-  },
-}
diff --git a/src/types/OpConfig.ts b/src/types/OpConfig.ts
deleted file mode 100644
index bb5238b..0000000
--- a/src/types/OpConfig.ts
+++ /dev/null
@@ -1,28 +0,0 @@
-import type { Address } from 'viem'
-import { type Config } from 'wagmi'
-
-// TODO: export these from op-viem and import here
-export type ContractAddress<chainId = number> = { address: Address; chainId: chainId; blockCreated?: number }
-export type L1Addresses<chainId = number> = {
-  portal: ContractAddress<chainId>
-  l2OutputOracle: ContractAddress<chainId>
-  l1StandardBridge: ContractAddress<chainId>
-  l1CrossDomainMessenger: ContractAddress<chainId>
-  l1Erc721Bridge: ContractAddress<chainId>
-}
-
-export type L2Addresses<chainId = number> = {
-  l2L1MessagePasserAddress: ContractAddress<chainId>
-  l2StandardBridge: ContractAddress<chainId>
-}
-
-export type L2Chain<l1ChainId extends number, l2ChainId extends number> = {
-  chainId: l2ChainId
-  l1ChainId: l1ChainId
-  l1Addresses: L1Addresses<l1ChainId>
-  l2Addresses: L2Addresses<l2ChainId>
-}
-
-export type OpConfig = Config & {
-  readonly l2chains: Record<number, L2Chain<number, number>>
-}