diff --git a/packages/mask/src/extension/background-script/EthereumServices/interceptor.ts b/packages/mask/src/extension/background-script/EthereumServices/interceptor.ts
new file mode 100644
index 000000000000..174f7849b87e
--- /dev/null
+++ b/packages/mask/src/extension/background-script/EthereumServices/interceptor.ts
@@ -0,0 +1,38 @@
+import type { JsonRpcPayload, JsonRpcResponse } from 'web3-core-helpers'
+import { ChainId, createLookupTableResolver } from '@masknet/web3-shared-evm'
+import { BobaInterceptor } from './interceptors'
+import type { Interceptor } from './types'
+
+const getInterceptor = createLookupTableResolver<ChainId, Interceptor | null>(
+    {
+        [ChainId.Mainnet]: null,
+        [ChainId.Ropsten]: null,
+        [ChainId.Kovan]: null,
+        [ChainId.Rinkeby]: null,
+        [ChainId.Gorli]: null,
+        [ChainId.BSC]: null,
+        [ChainId.BSCT]: null,
+        [ChainId.Matic]: null,
+        [ChainId.Mumbai]: null,
+        [ChainId.Arbitrum]: null,
+        [ChainId.Arbitrum_Rinkeby]: null,
+        [ChainId.xDai]: null,
+        [ChainId.Celo]: null,
+        [ChainId.Fantom]: null,
+        [ChainId.Aurora]: null,
+        [ChainId.Avalanche]: null,
+        [ChainId.Boba]: new BobaInterceptor(),
+        [ChainId.Optimistic]: null,
+    },
+    null,
+)
+
+export function encodePayload(chainId: ChainId, payload: JsonRpcPayload) {
+    const interceptor = getInterceptor(chainId)
+    return interceptor?.encode?.(payload) ?? payload
+}
+
+export function decodeResponse(chainId: ChainId, error: Error | null, response?: JsonRpcResponse) {
+    const interceptor = getInterceptor(chainId)
+    return interceptor?.decode?.(error, response) ?? [error, response]
+}
diff --git a/packages/mask/src/extension/background-script/EthereumServices/interceptors/Boba.ts b/packages/mask/src/extension/background-script/EthereumServices/interceptors/Boba.ts
new file mode 100644
index 000000000000..c6dfb82ceadc
--- /dev/null
+++ b/packages/mask/src/extension/background-script/EthereumServices/interceptors/Boba.ts
@@ -0,0 +1,13 @@
+import type { JsonRpcPayload, JsonRpcResponse } from 'web3-core-helpers'
+import type { Interceptor } from '../types'
+
+export class BobaInterceptor implements Interceptor {
+    encode(payload: JsonRpcPayload): JsonRpcPayload {
+        throw new Error('Method not implemented.')
+    }
+    decode(error: Error | null, response?: JsonRpcResponse): [Error | null, JsonRpcResponse] {
+        throw new Error('Method not implemented.')
+    }
+    getPayloadHash(payload: JsonRpcPayload) {}
+    getPayloadNonce(payload: JsonRpcPayload) {}
+}
diff --git a/packages/mask/src/extension/background-script/EthereumServices/interceptors/index.ts b/packages/mask/src/extension/background-script/EthereumServices/interceptors/index.ts
new file mode 100644
index 000000000000..bc6be114f9b6
--- /dev/null
+++ b/packages/mask/src/extension/background-script/EthereumServices/interceptors/index.ts
@@ -0,0 +1 @@
+export * from './Boba'
diff --git a/packages/web3-shared/evm/types/index.ts b/packages/web3-shared/evm/types/index.ts
index 86d36bcc85f1..9a03e5dc13ed 100644
--- a/packages/web3-shared/evm/types/index.ts
+++ b/packages/web3-shared/evm/types/index.ts
@@ -366,6 +366,10 @@ export enum EthereumMethodType {
     MASK_REPLACE_TRANSACTION = 'mask_replaceTransaction',
     MASK_LOGIN_FORTMATIC = 'mask_loginFortmatic',
     MASK_LOGOUT_FORTMATIC = 'mask_logoutFortmatic',
+
+    // optimistic, boba
+    ROLLUP_GET_INFO = 'rollup_getInfo',
+    ROLLUP_GAS_PRICES = 'rollup_gasPrices',
 }
 
 export enum EthereumErrorType {