> ## Documentation Index
> Fetch the complete documentation index at: https://cosmos-docs-cosmjs-docs.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Building Messages

> Construct message objects for token transfers, staking, and multi-message transactions

Every Cosmos SDK transaction contains one or more **messages** — typed instructions that tell the chain what to do. In CosmJS, messages are represented as `EncodeObject` values: a `typeUrl` string paired with a Protobuf message value.

## Token Transfer (MsgSend)

```typescript theme={"system"}
import { MsgSend } from "cosmjs-types/cosmos/bank/v1beta1/tx";
import { coins } from "@cosmjs/proto-signing";

const sendMsg = {
  typeUrl: "/cosmos.bank.v1beta1.MsgSend",
  value: MsgSend.fromPartial({
    fromAddress: senderAddress,
    toAddress: "cosmos1recipientaddress...",
    amount: coins(1_000_000, "uatom"),
  }),
};
```

`MsgSend.fromPartial()` creates a message from a partial object, filling in defaults for missing fields. The `coins` helper builds the `[{ denom, amount }]` array.

## Staking Delegation

```typescript theme={"system"}
import { MsgDelegate } from "cosmjs-types/cosmos/staking/v1beta1/tx";

const delegateMsg = {
  typeUrl: "/cosmos.staking.v1beta1.MsgDelegate",
  value: MsgDelegate.fromPartial({
    delegatorAddress: senderAddress,
    validatorAddress: "cosmosvaloper1...",
    amount: { denom: "uatom", amount: "1000000" },
  }),
};
```

## Multiple Messages in One Transaction

A single transaction can carry multiple messages. They execute atomically — all succeed or all fail:

```typescript theme={"system"}
const messages = [sendMsg, delegateMsg];
const result = await client.signAndBroadcast(senderAddress, messages, "auto");
```

<Tip>
  For type-safe message construction, use typed encode objects like `MsgSendEncodeObject` from `@cosmjs/stargate`. See [EncodeObject](/cosmjs/v0.38.x/concepts/messages-encoding/encode-objects) for the full list.
</Tip>

## Next Steps

<CardGroup cols={2}>
  <Card title="Simulating Gas" icon="gauge" href="/cosmjs/v0.38.x/guides/transactions/simulating-gas">
    Estimate how much gas your messages will consume before broadcasting.
  </Card>

  <Card title="Custom Message Types" icon="puzzle-piece" href="/cosmjs/v0.38.x/concepts/transactions/custom-messages">
    Register your own Protobuf message types with the Registry.
  </Card>
</CardGroup>