[ANN] Tendermint KMS v0.9: pre-Stargate maintenance release

Tendermint Key Management System (KMS) , a.k.a. TMKMS , is a signature service with support for Hardware Security Modules (HSMs), such as YubiHSM2 and Ledger Nano S . It’s intended to be run alongside Cosmos Validators, ideally on separate physical hosts, providing defense-in-depth for online validator signing keys, double signing protection, and functioning as a central signing service that can be used when operating multiple validators in several Cosmos Zones. We’ve just released v0.9.0 : a maintenance release with dependency upgrades and a handful of breaking changes. Breaking Changes `protocol_version` now mandatory attribute of `[[validator]]` This is the most important thing to double check before deploying v0.9.0! Please double check your `tmkms.toml` file’s `[[validator]]` entries and make sure they have a `protocol_version` field like so: ``` [[validator]] chain_id = "cosmoshub-3" protocol_version = "legacy" ``` If this field is missing, please add `protocol_version = "legacy"`. If it’s absent, TMKMS will not start! Note: this release includes a `protocol_version = "v0.34"` (i.e. Stargate) option, but it’s incomplete and cannot yet be used on Stargate…

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