refactor(amplifier-api): introduce codegen for open-api

[anstylian]

refactor(amplifier-api): migrate to codegen OpenAPI client, remove hand-written types/client

• Replace hand-written API client, types, and BigInt logic with code generated from OpenAPI schema (schema.yaml) using progenitor.
• Add build.rs to generate Rust client code at build time, including custom Borsh serialization and QueueMsgId trait implementations.
• Update dependencies in Cargo.toml for codegen and tracing/opentelemetry support.
• Remove src/big_int.rs, src/client.rs, src/client/requests.rs, and src/types.rs.
• All API types and client logic now come from generated code in amplifier_open_api module.

The schema is coming from here:
schema/schema.yaml

[anstylian]

This is commented out to get the generated code like this:

    pub enum Event {
        GasCreditEvent(GasCreditEvent),
        GasRefundedEvent(GasRefundedEvent),
        CallEvent(CallEvent),
        MessageApprovedEvent(MessageApprovedEvent),
        MessageExecutedEvent(MessageExecutedEvent),
        MessageExecutedEventV2(MessageExecutedEventV2),
        CannotExecuteMessageEvent(CannotExecuteMessageEvent),
        CannotExecuteMessageEventV2(CannotExecuteMessageEventV2),
        CannotRouteMessageEvent(CannotRouteMessageEvent),
        CannotExecuteTaskEvent(CannotExecuteTaskEvent),
        SignersRotatedEvent(SignersRotatedEvent),
        ItsLinkTokenStartedEvent(ItsLinkTokenStartedEvent),
        ItsTokenMetadataRegisteredEvent(ItsTokenMetadataRegisteredEvent),
        ItsInterchainTokenDeploymentStartedEvent(
            ItsInterchainTokenDeploymentStartedEvent,
        ),
        ItsInterchainTransferEvent(ItsInterchainTransferEvent),
        AppInterchainTransferSentEvent(AppInterchainTransferSentEvent),
        AppInterchainTransferReceivedEvent(AppInterchainTransferReceivedEvent),
    }

If have those lines enabled the generated code looks like this:

    pub enum Event {
        Variant0 {
            #[serde(rename = "eventID")]
            event_id: EventVariant0EventId,
            #[serde(rename = "messageID")]
            message_id: EventVariant0MessageId,
            #[serde(default, skip_serializing_if = "::std::option::Option::is_none")]
            meta: ::std::option::Option<EventMetadata>,
            payment: UnsignedToken,
            #[serde(rename = "refundAddress")]
            refund_address: Address,
            #[serde(rename = "type")]
            type_: EventType,
        },
        Variant1 {
            cost: Cost,
            #[serde(rename = "eventID")]
            event_id: EventVariant1EventId,
            #[serde(rename = "messageID")]
            message_id: EventVariant1MessageId,
            #[serde(default, skip_serializing_if = "::std::option::Option::is_none")]
            meta: ::std::option::Option<EventMetadata>,
            #[serde(rename = "recipientAddress")]
            recipient_address: Address,
            #[serde(rename = "refundedAmount")]
            refunded_amount: UnsignedToken,
            #[serde(rename = "type")]
            type_: EventType,
        },

[anstylian]

This code is moved from the previous implementation. It was at crates/amplifier-api/src/client.rs.

[anstylian]

I’d prefer not to edit this file much, so I added Ok(Ok(())) here. Later, in the JoinSet, a future returning eyre::Result<()> will be added.

[anstylian]

I’d prefer not to edit this file much, so I added Ok(Ok(())) here. Later, in the JoinSet, a future returning eyre::Result<()> will be added.

[anstylian]

If you have any good suggestion, I prefer to drop the changes of crate relayer-amplifier-api-integration

[anstylian]

I have convert it back to Draft because the QueueMsgId needs to be implemented for Events as well.