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

# Create a key list

Create a key list key structure where all the keys in the list are required to sign transactions that modify accounts, topics, tokens, smart contracts, or files. A key list can contain a [Ed25519](/native/keys/generate-key-pair#ed25519) or [ECDSA](/native/keys/generate-key-pair#ecdsa-secp256k1) (secp256k1\_)\_ key type.

If all the keys in the key list key structure do not sign, the transaction will fail and return an "INVALID\_SIGNATURE" error. A key list can have repeated keys. A signature for the repeated key will count as many times as the key is listed in the key list. For example, a key list has three keys. Two of the three public keys in the list are the same. When a user signs a transaction with the repeated key it will account for two out of the three keys required signature.

<table><thead><tr><th /><th /><th /></tr></thead><tbody><tr><td><strong>Method</strong></td><td><strong>Type</strong></td><td><strong>Description</strong></td></tr><tr><td><code>KeyList.of(\<keys>)</code></td><td>Key</td><td>Keys to add to the key list</td></tr></tbody></table>

<Tabs>
  <Tab title="Java">
    ```java theme={null}
    //Generate 3 keys
    PrivateKey key1 = PrivateKey.generate();
    PublicKey publicKey1 = key1.getPublicKey();

    PrivateKey key2 = PrivateKey.generate();
    PublicKey publicKey2 = key2.getPublicKey();

    PrivateKey key3 = PrivateKey.generate();
    PublicKey publicKey3 = key3.getPublicKey();

    //Create a key list where all 3 keys are required to sign
    KeyList keyStructure = KeyList.of(key1, key2, key3);

    System.println(keyStructure)

    //v2.0.0
    ```

    **Sample Output**

    ```
    KeyList{threshold=null, 
         keys=[302e020100300506032b6570042204201cd556de918842179791d9edd75cdd2b5d34c5c73b0239ec0b34c67eedc020fd, 302e020100300506032b6570042204209ca1ce4463b71c72bba0219c37e18347a5145a9797c6546a6c99e50255c54be3, 302e020100300506032b657004220420982bb43f4947e8376e2f0ebfde086d24323b04d731da29446e5bc399ffbe06e1]
    }
    ```
  </Tab>

  <Tab title="JavaScript">
    ```java theme={null}
    //Generate 3 keys
    const key1 = PrivateKey.generate();
    const publicKey1 = key1.publicKey;

    const key2 = PrivateKey.generate();
    const publicKey2 = key2.publicKey;

    const key3 = PrivateKey.generate();
    const publicKey3 = key3.publicKey;

    //Create a list of the keys
    const publicKeyList = [];
        
    publicKeyList.push(publicKey1);
    publicKeyList.push(publicKey2);
    publicKeyList.push(publicKey3);

    //Create a key list where all 3 keys are required to sign
    const keys = new KeyList(publicKeyList);
    //v2.0.13
    ```
  </Tab>

  <Tab title="Go">
    ```java theme={null}
    //Generate 3 keys
    key1, err := hedera.GeneratePrivateKey()

    if err != nil {
        panic(err)
    }

    publicKey1, err := key1.PublicKey()

    key2, err := hedera.GeneratePrivateKey()

    if err != nil {
        panic(err)
    }

    publicKey2, err := key2.PublicKey()

    key3, err := hedera.GeneratePrivateKey()

    if err != nil {
        panic(err)
    }

    publicKey3, err := key3.PublicKey()

    //Create a key list where all 3 keys are required to sign
    keys := make([]hedera.PublicKey, 3)

    keys[0] = publicKey1
    keys[1] = publicKey2
    keys[2] = publicKey3

    keyStructure := hedera.NewKeyList().AddAllPublicKeys(keys)

    fmt.Printf("The key list is %v\n", keyStructure) 

    //v2.0.0
    ```
  </Tab>

  <Tab title="Rust">
    ```rust theme={null}
    let key_list = KeyList::new()

    println!("The key list is {:?}", key_list);

    // v0.34.0
    ```
  </Tab>
</Tabs>