STATE_CLOSED - A channel has been closed and can no longer be used to send or receive packets.
STATE_INIT - A channel has just started the opening handshake.
STATE_OPEN - A channel has completed the handshake. Open channels are ready to send and receive packets.
STATE_TRYOPEN - A channel has acknowledged the handshake step on the counterparty chain.
STATE_UNINITIALIZED_UNSPECIFIED - Default State
State defines if a channel is in one of the following states: CLOSED, INIT, TRYOPEN, OPEN or UNINITIALIZED.