subxt_metadata/from_into/
mod.rs

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// Copyright 2019-2023 Parity Technologies (UK) Ltd.
// This file is dual-licensed as Apache-2.0 or GPL-3.0.
// see LICENSE for license details.

use core::fmt::Display;

use alloc::string::String;

mod v14;
mod v15;

/// An error emitted if something goes wrong converting [`frame_metadata`]
/// types into [`crate::Metadata`].
#[derive(Debug, PartialEq, Eq)]
#[non_exhaustive]
pub enum TryFromError {
    /// Type missing from type registry
    TypeNotFound(u32),
    /// Type was not a variant/enum type
    VariantExpected(u32),
    /// An unsupported metadata version was provided.
    UnsupportedMetadataVersion(u32),
    /// Type name missing from type registry
    TypeNameNotFound(String),
    /// Invalid type path.
    InvalidTypePath(String),
}

impl Display for TryFromError {
    fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
        match self {
            TryFromError::TypeNotFound(e) => write!(
                f,
                "Type id {e} is expected but not found in the type registry"
            ),
            TryFromError::VariantExpected(e) => write!(
                f,
                "Type {e} was not a variant/enum type, but is expected to be one"
            ),
            TryFromError::UnsupportedMetadataVersion(e) => {
                write!(f, "Cannot convert v{e} metadata into Metadata type")
            }
            TryFromError::TypeNameNotFound(e) => write!(
                f,
                "Type name {e} is expected but not found in the type registry"
            ),
            TryFromError::InvalidTypePath(e) => write!(f, "Type has an invalid path {e}"),
        }
    }
}

#[cfg(feature = "std")]
impl std::error::Error for TryFromError {}

impl From<crate::Metadata> for frame_metadata::RuntimeMetadataPrefixed {
    fn from(value: crate::Metadata) -> Self {
        let m: frame_metadata::v15::RuntimeMetadataV15 = value.into();
        m.into()
    }
}

impl TryFrom<frame_metadata::RuntimeMetadataPrefixed> for crate::Metadata {
    type Error = TryFromError;

    fn try_from(value: frame_metadata::RuntimeMetadataPrefixed) -> Result<Self, Self::Error> {
        match value.1 {
            frame_metadata::RuntimeMetadata::V0(_) => {
                Err(TryFromError::UnsupportedMetadataVersion(0))
            }
            frame_metadata::RuntimeMetadata::V1(_) => {
                Err(TryFromError::UnsupportedMetadataVersion(1))
            }
            frame_metadata::RuntimeMetadata::V2(_) => {
                Err(TryFromError::UnsupportedMetadataVersion(2))
            }
            frame_metadata::RuntimeMetadata::V3(_) => {
                Err(TryFromError::UnsupportedMetadataVersion(3))
            }
            frame_metadata::RuntimeMetadata::V4(_) => {
                Err(TryFromError::UnsupportedMetadataVersion(4))
            }
            frame_metadata::RuntimeMetadata::V5(_) => {
                Err(TryFromError::UnsupportedMetadataVersion(5))
            }
            frame_metadata::RuntimeMetadata::V6(_) => {
                Err(TryFromError::UnsupportedMetadataVersion(6))
            }
            frame_metadata::RuntimeMetadata::V7(_) => {
                Err(TryFromError::UnsupportedMetadataVersion(7))
            }
            frame_metadata::RuntimeMetadata::V8(_) => {
                Err(TryFromError::UnsupportedMetadataVersion(8))
            }
            frame_metadata::RuntimeMetadata::V9(_) => {
                Err(TryFromError::UnsupportedMetadataVersion(9))
            }
            frame_metadata::RuntimeMetadata::V10(_) => {
                Err(TryFromError::UnsupportedMetadataVersion(10))
            }
            frame_metadata::RuntimeMetadata::V11(_) => {
                Err(TryFromError::UnsupportedMetadataVersion(11))
            }
            frame_metadata::RuntimeMetadata::V12(_) => {
                Err(TryFromError::UnsupportedMetadataVersion(12))
            }
            frame_metadata::RuntimeMetadata::V13(_) => {
                Err(TryFromError::UnsupportedMetadataVersion(13))
            }
            frame_metadata::RuntimeMetadata::V14(m) => m.try_into(),
            frame_metadata::RuntimeMetadata::V15(m) => m.try_into(),
            frame_metadata::RuntimeMetadata::V16(_opaque) => {
                Err(TryFromError::UnsupportedMetadataVersion(16))
            }
        }
    }
}