signMessage

const signer = library.getSigner(account)
const address = await signer.getAddress()
const hexMessage = bufferToHex(Buffer.from(message, 'utf-8'))

const messageLength = new Blob([message]).size
const bytesMessage = ethers.utils.toUtf8Bytes(
    '\x19Ethereum Signed Message:\n' + messageLength + message
)
const keccakMessage = ethers.utils.keccak256(bytesMessage)

let params = [address.toLowerCase()];

if (library.provider.wc.peerMeta.name.includes("Rainbow")){
  params = [
      ...params,
      hexMessage
  ]
} else {
  params = [
      ...params,
      keccakMessage
  ]
}

const signature = await library.provider.connector.signMessage(params)
return signature