create-a-key-list.md

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 or ECDSA (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.

{% tabs %} {% tab title="V1" %}

Method	Type	Description
add(<key>)	Ed25519PublicKey	Add one public key to the key list
addAll(<keys>)	Ed25519PublicKey	Add all keys to the key list

{% code title="Java" %}

//Generate 3 keys
Ed25519PrivateKey key1 = Ed25519PrivateKey.generate();
Ed25519PublicKey publicKey1 = key1.publicKey;

Ed25519PrivateKey key2 = Ed25519PrivateKey.generate();
Ed25519PublicKey publicKey2 = key2.publicKey;

Ed25519PrivateKey key3 = Ed25519PrivateKey.generate();
Ed25519PublicKey publicKey3 = key3.publicKey;

//Add they keys to a key list
KeyList keyList = new KeyList().add(publicKey1).add(publicKey2).add(publicKey3);

//v1.2.2

{% endcode %}

{% code title="JavaScript" %}

//Generate 3 keys
const key1 = await Ed25519PrivateKey.generate();
const publicKey1 = key1.publicKey;

const key2 = await Ed25519PrivateKey.generate();
const publicKey2 = key2.publicKey;

const key3 = await Ed25519PrivateKey.generate();
const publicKey3 = key3.publicKey;

//Add they keys to a key list
const keyList = new KeyList().add(publicKey1).add(publicKey2).add(publicKey3);

//v1.4.2

{% endcode %} {% endtab %} {% endtabs %}