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use failure::Fail; #[derive(Debug, PartialEq, Fail)] pub enum ProtocolError { #[fail(display = "Invalid opcode: {}", opcode)] InvalidOpcode { opcode: u8 }, #[fail(display = "Invalid Payload: {}", reason)] InvalidPayload { reason: String }, #[fail( display = "Payload Size Too Large: {} bytes. Max bytes: {}", actual, max )] PayloadTooLarge { actual: u32, max: u32 }, }