message: Convert block time to i64
diff: @@ -10,8 +10,8 @@ pub struct Params {
  #[derive(Serialize, Deserialize)]
  pub struct BlockInfo {
  pub height: i64,
  - // block_time is RFC3339 encoded timestamp
  - pub time: String,
  + // time is seconds since epoch begin (Jan. 1, 1970)
  + pub time: i64,
  pub chain_id: String,
  }
  @@ -92,7 +92,7 @@ pub fn mock_params(signer: &str, sent: &[Coin], balance: &[Coin]) -> Params {
  Params {
  block: BlockInfo {
  height: 12345,
  - time: "2020-01-08T12:34:56Z".to_string(),
  + time: 1571797419,
  chain_id: "cosmos-testnet-14002".to_string(),
  },
  message: MessageInfo {
  