feat: allow key_format = { type = "cosmos-json" } (#407)

Cargo.toml

@@ -20,6 +20,7 @@ abscissa_tokio = { version = "=0.6.0-pre.2", optional = true }
 bytes_v0_5 = { version = "0.5", package = "bytes" }
 bytes = "1"
 chrono = "0.4"
+cosmrs = "0.2.1"
 ed25519-dalek = "1"
 eyre = "0.6"
 getrandom = "0.1"

src/keyring/format.rs

@@ -1,5 +1,6 @@
 //! Chain-specific key configuration
 
+use cosmrs::crypto::PublicKey;
 use serde::Deserialize;
 use subtle_encoding::bech32;
 use tendermint::TendermintKey;
@@ -18,6 +19,10 @@ pub enum Format {
         consensus_key_prefix: String,
     },
 
+    /// JSON-encoded Cosmos protobuf representation of keys
+    #[serde(rename = "cosmos-json")]
+    CosmosJson,
+
     /// Hex is a baseline representation
     #[serde(rename = "hex")]
     Hex,
@@ -36,6 +41,7 @@ impl Format {
                 }
                 TendermintKey::ConsensusKey(pk) => pk.to_bech32(consensus_key_prefix),
             },
+            Format::CosmosJson => PublicKey::from(*public_key.public_key()).to_json(),
             Format::Hex => public_key.to_hex(),
         }
     }

tmkms.toml.example

@@ -8,7 +8,7 @@
 # Information about Tendermint blockchain networks this KMS services
 #
 # - id: The chain ID for this chain
-# - key_format: How this chain handles serialization. Type may be "bech32" or "hex"
+# - key_format: How this chain handles serialization. Type may be "bech32", "cosmos-json" or "hex"
 # - state_file (optional): path to where the state of the last signing operation is persisted
 # - state_hook (optional): user-specified command to run on startup to obtain the current height
 #   of this chain. The command should output JSON which looks like the following:
@@ -24,6 +24,11 @@ id = "irishub"
 key_format = { type = "bech32", account_key_prefix = "iap", consensus_key_prefix = "icp" }
 # state_file = "/path/to/irishub_priv_validator_state.json"
 
+[[chain]]
+id = "agoricdev-4"
+key_format = { type = "cosmos-json" }
+# state_file = "/path/to/agoricdev_priv_validator_state.json"
+
 ## Validator configuration
 [[validator]]
 addr = "tcp://[email protected]:26658"