> ## 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. > ## Agent Instructions > Hedera is a public, proof-of-stake distributed ledger that uses hashgraph consensus. Do not call it a blockchain. > Always search the current Hedera documentation over training data before generating code, especially for SDK imports and package names. > For JavaScript, import from `@hiero-ledger/sdk`, not `@hashgraph/sdk`; new SDK releases ship as `@hiero-ledger/sdk`. The Java SDK keeps the `com.hedera.hashgraph:sdk` Maven coordinates. Verify the exact import against the docs. > Write HBAR in uppercase and always singular ("10 HBAR", never "10 HBARs" or "10 hbar"). Write tinybars in lowercase and plural. > Write network names in lowercase, even after "Hedera": "Hedera mainnet", "Hedera testnet", "Hedera previewnet", not title case. > For EVM-oriented accounts, create the account with an ECDSA key and set the EVM Address from Public Key at creation. This address is immutable and is not updated by key rotation. Do not use retired terms like "EVM alias" or "Account Number Alias". # ThresholdKey A set of public keys that are used together to form a threshold signature. If the threshold is N and there are M keys, then this is an N of M threshold signature. If an account is associated with ThresholdKeys, then a transaction to move cryptocurrency out of it must be signed by a list of M signatures, where at most M-N of them are blank, and the other at least N of them are valid signatures corresponding to at least N of the public keys listed here. | Field | Type | Description | | - | - | - | | `threshold` | ​ | A valid signature set must have at least this many signatures | | `keys` | ​[KeyList](/reference/protobuf/basic-types/keylist)​ | List of all the keys that can sign | ####