Fix relayer package exports for backward compatibility

[shunkakinoki]

Summary

Fixes breaking changes from PR #891 by adding backward-compatible exports to the relayer package and updating internal packages to use the new export structure.

Problem

PR #891 refactored the relayer package to use namespace exports only, which broke both internal and external downstream packages:

Internal packages affected:

• @0xsequence/wallet-core - needed Relayer namespace for types
• @0xsequence/dapp-client - used RpcRelayer.RpcRelayer class
• Compiled external packages expecting direct exports

External packages affected:

• 0xtrails package failed to build with import errors
• Old compiled packages (e.g., @0xsequence/account@2.3.30) expecting proto, isRelayer, RpcRelayer exports

Error examples:

error TS2724: '@0xsequence/relayer' has no exported member 'Relayer'
error: "ETHTxnStatus" is not exported by "relayer/dist/index.js"
error: "proto" is not exported by "relayer/dist/index.js"

Solution

1. Enhanced relayer package exports (packages/services/relayer/src/index.ts)

Added comprehensive backward-compatible exports while preserving namespace structure:

Direct exports for backward compatibility:

• isRelayer function
• RpcRelayer class
• ETHTxnStatus, FeeTokenType enums
• Type exports: RelayerInterface, FeeOption, FeeQuote, OperationStatus, etc.

Namespace exports:

• proto - for old compiled packages using proto.FeeTokenType
• Relayer - for wallet-core type usage (Relayer.OperationStatus)
• Preconditions, StandardRelayer, RelayerGen - for organization

This allows multiple import styles:

// Direct imports (backward compatible)
import { RpcRelayer, isRelayer, ETHTxnStatus } from '@0xsequence/relayer'
const relayer = new RpcRelayer(url, chainId, rpcUrl)

// Namespace imports (new structure)
import { Relayer, proto } from '@0xsequence/relayer'
type Status = Relayer.OperationStatus
const feeType = proto.FeeTokenType.ERC20_TOKEN

// Mixed approach
import { RpcRelayer, type RelayerInterface } from '@0xsequence/relayer'

2. Updated dapp-client to use direct imports

Files modified:

• packages/wallet/dapp-client/src/ChainSessionManager.ts
• packages/wallet/dapp-client/src/DappClient.ts

Changed from RpcRelayer.RpcRelayer to direct RpcRelayer class usage.

Test Plan

• All internal packages build successfully
• Relayer package exports correctly
• Wallet-core builds without errors
• Dapp-client builds without errors
• External package (0xtrails) builds successfully with symlinked local relayer
• Both namespace and direct import styles work

Breaking Change Mitigation

This PR ensures no breaking changes for:

1. ✅ Internal packages using namespace imports
2. ✅ Old compiled packages expecting direct exports
3. ✅ External packages using either import style
4. ✅ Packages compiled against older relayer versions

Fixes issues caused by #891

🤖 Generated with Claude Code

[Copilot]

Pull Request Overview

This PR restores backward compatibility for the @0xsequence/relayer package by adding direct exports alongside the namespace exports introduced in PR #891. The changes prevent breaking downstream packages that rely on direct imports of types and enums.

Key Changes:

• Added direct exports for commonly used enums (ETHTxnStatus, FeeTokenType)
• Added direct type exports for relayer interfaces and status types
• Preserved existing namespace exports to support both import styles

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[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Keep Relayer type available under its original name

The fix adds type re‑exports but renames the main Relayer interface to RelayerInterface. Prior to #891, downstream code could import type { Relayer } from '@0xsequence/relayer' and compile. After the refactor those imports failed, and this change still requires a rename to RelayerInterface, so existing consumers remain broken. Exporting the type under the original Relayer name (even in addition to the alias) is necessary to actually restore backward compatibility.

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[chatgpt-codex-connector]

Missing direct export for RpcRelayer constructor

Before #891 the module re‑exported everything from rpc-relayer/index, so code could instantiate the client with new RpcRelayer(...). After the refactor export * as RpcRelayer from './rpc-relayer/index.js' exports a namespace object instead of the constructor, and callers must now use new RpcRelayer.RpcRelayer(...). This change adds direct type exports but still omits a value re‑export for the constructor, so existing runtime imports continue to break. Consider adding export { RpcRelayer } from './rpc-relayer/index.js' (and similar for other top‑level classes) alongside the namespace export.

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