Sign Message

try {
  // ...
  const response = await provider.signMessage(
    "cosmoshub-4",
    "cosmos1gr0e3pj3y6fqvzyfm0qxyw9h5dwfrvh8zv3x9p", // signer
    "message!!!!" // message
  );
} catch (e) {
  if (e instanceof InstallError) {
    console.log("not installed");
  }
 
  if (e.code === 4001) {
    console.log("user rejected request");
  }
 
  // exception
}

const response = await window.cosmostation.cosmos.request({
  method: "cos_signMessage",
  params: {
    chainName: "cosmoshub-4",
    signer: "cosmos1gr0e3pj3y6fqvzyfm0qxyw9h5dwfrvh8zv3x9p",
    message: "message!!!!",
  },
});

export type SignMessageResponse = {
  signature: string;
  pub_key: { type: string; value: string };
};

{
  "pub_key": {
    "type": "tendermint/PubKeySecp256k1",
    "value": "A00Jvfv5luvAODNiOPIMZpDTWSq7qvoFV8k7ptdsDqLU"
  },
  "signature": "signature=="
}

try {
  const response = await provider.signMessage(
    "cosmoshub-4",
    "cosmos1gr0e3pj3y6fqvzyfm0qxyw9h5dwfrvh8zv3x9p",
    "message!!!!"
  );
 
  const result = await provider.verifyMessage(
    "cosmoshub-4",
    "cosmos1gr0e3pj3y6fqvzyfm0qxyw9h5dwfrvh8zv3x9p",
    "message!!!!",
    response
  );
} catch (e) {
  if (e instanceof InstallError) {
    console.log("not installed");
  }
 
  if (e.code === 4001) {
    console.log("user rejected request");
  }
 
  // exception
}

const response = await window.cosmostation.cosmos.request({
  method: "cos_signMessage",
  params: {
    chainName: "cosmoshub-4",
    signer: "cosmos1gr0e3pj3y6fqvzyfm0qxyw9h5dwfrvh8zv3x9p",
    message: "message!!!!",
  },
});
 
const result = await window.cosmostation.cosmos.request({
  method: "cos_verifyMessage",
  params: {
    chainName: "cosmoshub-4",
    signer: "cosmos1gr0e3pj3y6fqvzyfm0qxyw9h5dwfrvh8zv3x9p",
    message: "message!!!!",
    publicKey: response.pub_key.value,
    signature: response.signature,
  },
});

export type VerifyMessageResponse = boolean;

true