diff --git a/core/src/ibc/transaction_handler/datagrams.rs b/core/src/ibc/transaction_handler/datagrams.rs
index 7addc95ece..72fa45f546 100644
--- a/core/src/ibc/transaction_handler/datagrams.rs
+++ b/core/src/ibc/transaction_handler/datagrams.rs
@@ -186,9 +186,9 @@ impl Decodable for Datagram {
         match tag {
             DatagramTag::CreateClient => {
                 let item_count = rlp.item_count()?;
-                if item_count != 4 {
+                if item_count != 5 {
                     return Err(DecoderError::RlpInvalidLength {
-                        expected: 4,
+                        expected: 5,
                         got: item_count,
                     })
                 }
diff --git a/ibc.ts/README.md b/ibc.ts/README.md
index 8d19ac5082..83fe20a5d6 100644
--- a/ibc.ts/README.md
+++ b/ibc.ts/README.md
@@ -12,6 +12,11 @@ This directory contains IBC relayer implementation and IBC demo scenario script.
 
 Run `yarn run runChains`
 
+## How to run a scenario
+
+Run `yarn run scenario`. It will create light clients, a connection, and a channel.
+Finally, it will send a packet.
+
 ## Print debug log
 
 Please use `DEBUG` environment variable.
diff --git a/ibc.ts/src/common/chain.ts b/ibc.ts/src/common/chain.ts
index f76d02f8c6..d988d5bfba 100644
--- a/ibc.ts/src/common/chain.ts
+++ b/ibc.ts/src/common/chain.ts
@@ -32,6 +32,7 @@ export interface ChainConfig {
     networkId: string;
     faucetAddress: PlatformAddress;
     counterpartyIdentifiers: CounterpartyIdentifiers;
+    keystorePath: string;
 }
 
 export class Chain {
@@ -42,7 +43,11 @@ export class Chain {
     public constructor(config: ChainConfig) {
         this.sdk = new SDK({
             server: config.server,
-            networkId: config.networkId
+            networkId: config.networkId,
+            keyStoreType: {
+                type: "local",
+                path: config.keystorePath
+            }
         });
         this.faucetAddress = config.faucetAddress;
         this.counterpartyIdentifiers = config.counterpartyIdentifiers;
@@ -67,7 +72,7 @@ export class Chain {
     }
 
     public async queryClient(
-        blockNumber: number
+        blockNumber?: number
     ): Promise<IBCQueryResult<ClientState> | null> {
         return this.sdk.rpc.sendRpcRequest("ibc_query_client_state", [
             this.counterpartyIdentifiers.client,
@@ -75,9 +80,17 @@ export class Chain {
         ]);
     }
 
-    public async queryHeader(blockNumber: number): Promise<IBCHeader | null> {
+    public async queryIBCHeader(
+        blockNumber: number
+    ): Promise<IBCHeader | null> {
         return this.sdk.rpc.sendRpcRequest("ibc_compose_header", [blockNumber]);
     }
+
+    public async queryChainHeader(blockNumber: number): Promise<string | null> {
+        return this.sdk.rpc.sendRpcRequest("chain_getRawHeaderByNumber", [
+            blockNumber
+        ]);
+    }
 }
 
 async function waitForTx(sdk: SDK, txHash: H256) {
diff --git a/ibc.ts/src/relayer/config.ts b/ibc.ts/src/common/config.ts
similarity index 90%
rename from ibc.ts/src/relayer/config.ts
rename to ibc.ts/src/common/config.ts
index f08210b6d1..7d9744f28f 100644
--- a/ibc.ts/src/relayer/config.ts
+++ b/ibc.ts/src/common/config.ts
@@ -14,6 +14,7 @@ interface FoundryChainConfig {
     counterpartyClientId: string;
     counterpartyConnectionId: string;
     counterpartyChannelId: string;
+    keystorePath: string;
 }
 
 export function getConfig(): Config {
@@ -26,7 +27,8 @@ export function getConfig(): Config {
             counterpartyConnectionId: getEnv(
                 "CHAIN_A_COUNTERPARTY_CONNECTION_ID"
             ),
-            counterpartyChannelId: getEnv("CHAIN_A_COUNTERPARTY_CHANNEL_ID")
+            counterpartyChannelId: getEnv("CHAIN_A_COUNTERPARTY_CHANNEL_ID"),
+            keystorePath: "./chainA/keystore.db"
         },
         chainB: {
             rpcURL: getEnv("CHAIN_B_RPC_URL"),
@@ -36,7 +38,8 @@ export function getConfig(): Config {
             counterpartyConnectionId: getEnv(
                 "CHAIN_B_COUNTERPARTY_CONNECTION_ID"
             ),
-            counterpartyChannelId: getEnv("CHAIN_B_COUNTERPARTY_CHANNEL_ID")
+            counterpartyChannelId: getEnv("CHAIN_B_COUNTERPARTY_CHANNEL_ID"),
+            keystorePath: "./chainB/keystore.db"
         }
     };
 }
diff --git a/ibc.ts/src/common/example.ts b/ibc.ts/src/common/example.ts
deleted file mode 100644
index 5a027ec8e9..0000000000
--- a/ibc.ts/src/common/example.ts
+++ /dev/null
@@ -1 +0,0 @@
-export let HelloWorld = "HelloWorld";
diff --git a/ibc.ts/src/relayer/index.ts b/ibc.ts/src/relayer/index.ts
index d477d16d73..6442e3af85 100644
--- a/ibc.ts/src/relayer/index.ts
+++ b/ibc.ts/src/relayer/index.ts
@@ -2,7 +2,7 @@ import Debug from "debug";
 import { Chain } from "../common/chain";
 import { Datagram } from "../common/datagram/index";
 import { delay } from "../common/util";
-import { getConfig } from "./config";
+import { getConfig } from "../common/config";
 import { PlatformAddress } from "codechain-primitives/lib";
 import { UpdateClientDatagram } from "../common/datagram/updateClient";
 
@@ -20,7 +20,8 @@ async function main() {
             client: config.chainA.counterpartyClientId,
             connection: config.chainA.counterpartyConnectionId,
             channel: config.chainA.counterpartyChannelId
-        }
+        },
+        keystorePath: config.chainA.keystorePath
     });
     const chainB = new Chain({
         server: config.chainB.rpcURL,
@@ -30,7 +31,8 @@ async function main() {
             client: config.chainB.counterpartyClientId,
             connection: config.chainB.counterpartyConnectionId,
             channel: config.chainB.counterpartyChannelId
-        }
+        },
+        keystorePath: config.chainB.keystorePath
     });
 
     while (true) {
@@ -122,7 +124,7 @@ async function updateLightClient({
     }
     let currentBlockNumber = clientState!.data!.number;
     while (currentBlockNumber < counterpartyChainHeight) {
-        const header = (await counterpartyChain.queryHeader(
+        const header = (await counterpartyChain.queryIBCHeader(
             currentBlockNumber + 1
         ))!;
         datagrams.push(
diff --git a/ibc.ts/src/scenario/index.ts b/ibc.ts/src/scenario/index.ts
index f120bc805c..c33e2944d9 100644
--- a/ibc.ts/src/scenario/index.ts
+++ b/ibc.ts/src/scenario/index.ts
@@ -1,7 +1,87 @@
-import { HelloWorld } from "../common/example";
+import Debug from "debug";
+import { getConfig } from "../common/config";
+import { Chain } from "../common/chain";
+import { PlatformAddress } from "codechain-primitives/lib";
+import { CreateClientDatagram } from "../common/datagram/createClient";
+import { strict as assert } from "assert";
+
+require("dotenv").config();
+
+const debug = Debug("scenario:main");
 
 async function main() {
-    console.log(HelloWorld);
+    const config = getConfig();
+    const chainA = new Chain({
+        server: config.chainA.rpcURL,
+        networkId: config.chainA.networkId,
+        faucetAddress: PlatformAddress.fromString(config.chainA.faucetAddress),
+        counterpartyIdentifiers: {
+            client: config.chainA.counterpartyClientId,
+            connection: config.chainA.counterpartyConnectionId,
+            channel: config.chainA.counterpartyChannelId
+        },
+        keystorePath: config.chainA.keystorePath
+    });
+    const chainB = new Chain({
+        server: config.chainB.rpcURL,
+        networkId: config.chainB.networkId,
+        faucetAddress: PlatformAddress.fromString(config.chainB.faucetAddress),
+        counterpartyIdentifiers: {
+            client: config.chainB.counterpartyClientId,
+            connection: config.chainB.counterpartyConnectionId,
+            channel: config.chainB.counterpartyChannelId
+        },
+        keystorePath: config.chainB.keystorePath
+    });
+
+    console.log("Create a light client in chain A");
+    await createLightClient({ chain: chainA, counterpartyChain: chainB });
+    console.log("Create a light client in chain B");
+    await createLightClient({ chain: chainB, counterpartyChain: chainA });
 }
 
 main().catch(console.error);
+
+async function createLightClient({
+    chain,
+    counterpartyChain
+}: {
+    chain: Chain;
+    counterpartyChain: Chain;
+}) {
+    debug("Create light client");
+    const counterpartyBlockNumber = await counterpartyChain.latestHeight();
+    const blockNumber = await chain.latestHeight();
+    debug(`height is ${counterpartyBlockNumber}`);
+    const counterpartyRawHeader = await counterpartyChain.queryChainHeader(
+        counterpartyBlockNumber
+    );
+    debug(`rawHeader is ${counterpartyRawHeader}`);
+
+    assert(counterpartyRawHeader, "header should not be empty");
+    assert.notStrictEqual(
+        counterpartyRawHeader!.substr(0, 2),
+        "0x",
+        "should not start with 0x"
+    );
+
+    debug(`Get queryClient`);
+    const clientStateBefore = await chain.queryClient(blockNumber);
+    assert.notEqual(clientStateBefore, null, "querying on the best block");
+    assert.equal(clientStateBefore!.data, null, "client is not initialized");
+
+    const createClient = new CreateClientDatagram({
+        id: chain.counterpartyIdentifiers.client,
+        kind: 0,
+        consensusState: Buffer.alloc(0),
+        data: Buffer.from(counterpartyRawHeader!, "hex")
+    });
+
+    debug(`Submit datagram`);
+    await chain.submitDatagram(createClient);
+
+    const clientStateAfter = await chain.queryClient();
+    assert.notEqual(clientStateAfter, null, "querying on the best block");
+    assert.notEqual(clientStateAfter!.data, null, "client is initialized");
+    debug(`Create client is ${JSON.stringify(clientStateAfter)}`);
+}
diff --git a/rpc/src/v1/impls/chain.rs b/rpc/src/v1/impls/chain.rs
index dcea46a28f..2a9df2cd32 100644
--- a/rpc/src/v1/impls/chain.rs
+++ b/rpc/src/v1/impls/chain.rs
@@ -26,6 +26,7 @@ use ctypes::transaction::Action;
 use ctypes::{BlockHash, BlockNumber, ShardId, Tracker, TxHash};
 use jsonrpc_core::Result;
 use primitives::H256;
+use rustc_hex::ToHex;
 use std::convert::TryFrom;
 use std::sync::Arc;
 
@@ -172,6 +173,11 @@ where
         }))
     }
 
+    fn get_raw_header_by_number(&self, block_number: u64) -> Result<Option<String>> {
+        let id = BlockId::Number(block_number);
+        Ok(self.client.block_header(&id).map(|header| header.into_inner().as_slice().to_hex()))
+    }
+
     fn get_block_transaction_count_by_hash(&self, block_hash: BlockHash) -> Result<Option<usize>> {
         Ok(self.client.block(&BlockId::Hash(block_hash)).map(|block| block.transactions_count()))
     }
diff --git a/rpc/src/v1/impls/ibc.rs b/rpc/src/v1/impls/ibc.rs
index a54f0104a0..95c8a2101c 100644
--- a/rpc/src/v1/impls/ibc.rs
+++ b/rpc/src/v1/impls/ibc.rs
@@ -23,6 +23,7 @@ use ccore::{BlockChainClient, BlockId, StateInfo};
 use ibc::client_02::types::Header;
 use jsonrpc_core::Result;
 use primitives::Bytes;
+use rustc_hex::ToHex;
 use std::sync::Arc;
 
 #[allow(dead_code)]
@@ -69,7 +70,7 @@ where
         Ok(Some(IBCQuery {
             number: block_number,
             data: client_state.map(|x| ClientState::from_core(&x)),
-            proof: querier::make_proof(&context, &path),
+            proof: querier::make_proof(&context, &path).to_hex(),
         }))
     }
 
@@ -96,7 +97,7 @@ where
         Ok(Some(IBCQuery {
             number: block_number,
             data: consensus_state.map(|x| ConsensusState::from_core(&x)),
-            proof: querier::make_proof(&context, &path),
+            proof: querier::make_proof(&context, &path).to_hex(),
         }))
     }
 
@@ -147,7 +148,7 @@ where
         let response = IBCQuery {
             number: block_number,
             data: connection_end.map(ConnectionEnd::from_core),
-            proof: querier::make_proof(&context, &path),
+            proof: querier::make_proof(&context, &path).to_hex(),
         };
         Ok(Some(response))
     }
@@ -172,7 +173,7 @@ where
         let response = IBCQuery {
             number: block_number,
             data: connections_in_client.map(|from_core| from_core.into_vec()),
-            proof: querier::make_proof(&context, &path),
+            proof: querier::make_proof(&context, &path).to_hex(),
         };
         Ok(Some(response))
     }
diff --git a/rpc/src/v1/traits/chain.rs b/rpc/src/v1/traits/chain.rs
index c3afff623e..666a9883ed 100644
--- a/rpc/src/v1/traits/chain.rs
+++ b/rpc/src/v1/traits/chain.rs
@@ -107,6 +107,10 @@ pub trait Chain {
     #[rpc(name = "chain_getBlockTransactionCountByHash")]
     fn get_block_transaction_count_by_hash(&self, block_hash: BlockHash) -> Result<Option<usize>>;
 
+    ///Gets the raw bytes of a header with given number.
+    #[rpc(name = "chain_getRawHeaderByNumber")]
+    fn get_raw_header_by_number(&self, block_number: u64) -> Result<Option<String>>;
+
     ///Gets the minimum transaction fee of the given name.
     #[rpc(name = "chain_getMinTransactionFee")]
     fn get_min_transaction_fee(&self, action_type: String, block_number: Option<u64>) -> Result<Option<u64>>;
diff --git a/rpc/src/v1/types/ibc.rs b/rpc/src/v1/types/ibc.rs
index 8a6ee191d1..ab940a563a 100644
--- a/rpc/src/v1/types/ibc.rs
+++ b/rpc/src/v1/types/ibc.rs
@@ -18,7 +18,7 @@ use codechain_core::ibc::client_02::types::{ClientState as CoreClientState, Cons
 use codechain_core::ibc::connection_03::types::{
     ConnectionEnd as CoreConnectionEnd, ConnectionState as CoreConnectionState,
 };
-use primitives::{Bytes, H256};
+use primitives::H256;
 use serde::Serialize;
 
 type Identifier = String;
@@ -36,7 +36,7 @@ type CommitmentPrefix = String;
 pub struct IBCQuery<T: Serialize> {
     pub number: u64,
     pub data: Option<T>,
-    pub proof: Bytes,
+    pub proof: String,
 }
 
 /// Client 02 related types
diff --git a/types/src/transaction/action.rs b/types/src/transaction/action.rs
index 112c872a46..18793152a3 100644
--- a/types/src/transaction/action.rs
+++ b/types/src/transaction/action.rs
@@ -51,6 +51,7 @@ impl Decodable for ActionTag {
             0x05 => Ok(Self::SetShardOwners),
             0x06 => Ok(Self::SetShardUsers),
             0x19 => Ok(Self::ShardStore),
+            0x20 => Ok(Self::IBC),
             0xFF => Ok(Self::Custom),
             _ => Err(DecoderError::Custom("Unexpected action prefix")),
         }