# EcdsaInactivity

## EcdsaInactivity

### Claim

```solidity
struct Claim {
  bytes32 walletID;
  uint256[] inactiveMembersIndices;
  bool heartbeatFailed;
  bytes signatures;
  uint256[] signingMembersIndices;
}
```

### groupThreshold

```solidity
uint256 groupThreshold
```

The minimum number of wallet signing group members needed to interact according to the protocol to produce a valid inactivity claim.

### signatureByteSize

```solidity
uint256 signatureByteSize
```

Size in bytes of a single signature produced by member supporting the inactivity claim.

### verifyClaim

```solidity
function verifyClaim(contract SortitionPool sortitionPool, struct EcdsaInactivity.Claim claim, bytes walletPubKey, uint256 nonce, uint32[] groupMembers) external view returns (uint32[] inactiveMembers)
```

Verifies the inactivity claim according to the rules defined in `Claim` struct documentation. Reverts if verification fails.

Wallet signing group members hash is validated upstream in `WalletRegistry.notifyOperatorInactivity()`

#### Parameters

| Name          | Type                         | Description                                           |
| ------------- | ---------------------------- | ----------------------------------------------------- |
| sortitionPool | contract SortitionPool       | Sortition pool reference                              |
| claim         | struct EcdsaInactivity.Claim | Inactivity claim                                      |
| walletPubKey  | bytes                        | Public key of the wallet                              |
| nonce         | uint256                      | Current inactivity nonce for wallet used in the claim |
| groupMembers  | uint32\[]                    | Identifiers of group members                          |

#### Return Values

| Name            | Type      | Description                             |
| --------------- | --------- | --------------------------------------- |
| inactiveMembers | uint32\[] | Identifiers of members who are inactive |

### validateMembersIndices

```solidity
function validateMembersIndices(uint256[] indices, uint256 groupSize) internal pure
```

Validates members indices array. Array is considered valid if its size and each single index are in \[1, groupSize] range, indexes are unique, and sorted in an ascending order. Reverts if validation fails.

#### Parameters

| Name      | Type       | Description                   |
| --------- | ---------- | ----------------------------- |
| indices   | uint256\[] | Array to validate.            |
| groupSize | uint256    | Group size used as reference. |


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.threshold.network/app-development/tbtc-contracts-api/ecdsa-api/ecdsainactivity.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.