# ContractMaintenanceAuthority

> For the complete documentation index, see [llms.txt](https://docs.midnight.network/llms.txt)

[**@midnight-ntwrk/compact-runtime v0.20.0**](https://docs.midnight.network/api-reference/compact-runtime.md)

***

[@midnight-ntwrk/compact-runtime](https://docs.midnight.network/api-reference/compact-runtime/globals.md) / ContractMaintenanceAuthority

# Class: ContractMaintenanceAuthority

A committee permitted to make changes to this contract. If a threshold of the public keys in this committee sign off, they can change the rules of this contract, or recompile it for a new version.

If the threshold is greater than the number of committee members, it is impossible for them to sign anything.

## Constructors[​](#constructors "Direct link to Constructors")

### Constructor[​](#constructor "Direct link to Constructor")

```
new ContractMaintenanceAuthority(

   committee, 

   threshold, 

   counter?): ContractMaintenanceAuthority;
```

Constructs a new authority from its components

If not supplied, `counter` will default to `0n`. Values should be non-negative, and at most 2^32 - 1.

At deployment, `counter` must be `0n`, and any subsequent update should set counter to exactly one greater than the current value.

#### Parameters[​](#parameters "Direct link to Parameters")

##### committee[​](#committee "Direct link to committee")

[`SignatureVerifyingKey`](https://docs.midnight.network/api-reference/compact-runtime/type-aliases/SignatureVerifyingKey.md)\[]

##### threshold[​](#threshold "Direct link to threshold")

`number`

##### counter?[​](#counter "Direct link to counter?")

`bigint`

#### Returns[​](#returns "Direct link to Returns")

`ContractMaintenanceAuthority`

## Properties[​](#properties "Direct link to Properties")

### committee[​](#committee-1 "Direct link to committee")

```
readonly committee: SignatureVerifyingKey[];
```

The committee public keys

***

### counter[​](#counter-1 "Direct link to counter")

```
readonly counter: bigint;
```

The replay protection counter

***

### threshold[​](#threshold-1 "Direct link to threshold")

```
readonly threshold: number;
```

How many keys must sign rule changes

## Methods[​](#methods "Direct link to Methods")

### serialize()[​](#serialize "Direct link to serialize()")

```
serialize(): Uint8Array;
```

#### Returns[​](#returns-1 "Direct link to Returns")

`Uint8Array`

***

### toString()[​](#tostring "Direct link to toString()")

```
toString(compact?): string;
```

#### Parameters[​](#parameters-1 "Direct link to Parameters")

##### compact?[​](#compact "Direct link to compact?")

`boolean`

#### Returns[​](#returns-2 "Direct link to Returns")

`string`

***

### deserialize()[​](#deserialize "Direct link to deserialize()")

```
static deserialize(raw): ContractMaintenanceAuthority;
```

#### Parameters[​](#parameters-2 "Direct link to Parameters")

##### raw[​](#raw "Direct link to raw")

`Uint8Array`

#### Returns[​](#returns-3 "Direct link to Returns")

`ContractMaintenanceAuthority`