Remove create_topic RPC and watch API

[Copilot]

Removes the wc_createTopic RPC method and the irn_watchRegister/irn_watchUnregister watch API, including all associated types, client methods, and the webhook example.

relay_rpc

• Removed CreateTopic, CreateTopicError and all watch types (WatchRegister, WatchUnregister, WatchError, WatchRegisterResponse)
• Removed Params::CreateTopic, Params::WatchRegister, Params::WatchUnregister enum variants
• Deleted rpc/watch.rs module entirely

relay_client

• Removed http::Client::create_topic, watch_register, watch_register_behalf, watch_unregister
• Removed WatchRegisterRequest, WatchUnregisterRequest, HttpClientError::Jwt
• Removed websocket::Client::create_topic
• Dropped unused origin field from http::Client (was only populated to support watch JWT claims)

root

• Deleted examples/webhook.rs and removed its [[example]] entry and warp dev-dependency

How Has This Been Tested?

Existing unit tests pass (cargo test -p relay_rpc -p relay_client).

Due Diligence

• Breaking change
• Requires a documentation update
• Requires a e2e/integration test update

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• binaries.soliditylang.org
  • Triggering command: /home/REDACTED/work/reown-rust/reown-rust/target/debug/build/relay_rpc-c16ca19e5d190591/out/../../../../.foundry/bin/forge /home/REDACTED/work/reown-rust/reown-rust/target/debug/build/relay_rpc-c16ca19e5d190591/out/../../../../.foundry/bin/forge build --contracts=relay_rpc/contracts --cache-path /home/REDACTED/work/reown-rust/reown-rust/target/debug/build/relay_rpc-c16ca19e5d190591/out/../../../../.foundry/forge/cache --out /home/REDACTED/work/reown-rust/reown-rust/target/debug/build/relay_rpc-c16ca19e5d190591/out/../../../../.foundry/forge/out 8bff5/build_script_build-7f48b6ffb558bff5.25hh9b8cgpung0klf2eux2wr6.0yetwzb.rcgucfg(feature, values()) 8bff5/build_script_build-7f48b6ffb558bff5.26nxbzwnhj0jun2idwhmpp51o.0yetwzb.rcgu-C 8bff5/build_script_build-7f48b6ffb558bff5.26phwlp9tw2xm5fx3bo2yxwjg.0yetwzb.rcgu.o 8bff5/build_script_build-7f48b6ffb558bff5.2g06m1oemylgspsn6o6b9qqjd.0yetwzb.rcgu.o 8bff5/build_script_build-7f48b6ffb558bff5.2gwcqiuke1fkyot6v86n0v7s6.0yetwzb.rcgu.o 8bff�� 8bff5/build_script_build-7f48b6ffb558bff5.2nf96x6renfbnl12hu9nfhx9h.0yetwzb.rcgu.o 8bff5/build_script_build-7f48b6ffb558bff5.2xjdbkpd3hnfhi2pztm3bp85k.0yetwzb.rcgu.o de/node/bin/as c 826f7a68079e6751-E pointer os.358bef6722a45-Wall (dns block)
  • Triggering command: /home/REDACTED/work/reown-rust/.codeql-scratch/dbs/rust/working/target/debug/build/relay_rpc-37c5f631bf17a953/out/../../../../.foundry/bin/forge /home/REDACTED/work/reown-rust/.codeql-scratch/dbs/rust/working/target/debug/build/relay_rpc-37c5f631bf17a953/out/../../../../.foundry/bin/forge build --contracts=relay_rpc/contracts --cache-path /home/REDACTED/work/reown-rust/.codeql-scratch/dbs/rust/working/target/debug/build/relay_rpc-37c5f631bf17a953/out/../../../../.foundry/forge/cache --out /home/REDACTED/work/reown-rust/.codeql-scratch/dbs/rust/working/target/debug/build/relay_rpc-37c5f631bf17a953/out/../../../../.foundry/forge/out /home/REDACTED/work/reown-rust/.codeql-scratch/dbs/rust/working/target/debug/deps/libsyn-e1c96a7797b61fd0.rlib futures_macro-3927f55cf91621ae.futures_macro.450e5fcfc49ae9a8-cgu.0.rcgu.o futures_macro-3927f55cf91621ae.futures_macro.450e5fcfc49ae9a8-cgu.1.rcgu.o futures_macro-3927f55cf91621ae.futures_macro.450e5fcfc49ae9a8-cgu.2.rcgu.o futures_macro-3927f55cf91621ae.futures_macro.450e5fcfc49ae9a8-cgu.3.rcgu.o futures_macro-3927f55cf91621ae.futures_macro.450e5fcfc49ae9a8-cgu.4.rcgu.o futures_macro-3927f55cf91621ae.futures_macro.450e5fcfc49ae9a8-cgu.5.rcgu.o /home/REDACTED/wor--json=diagnostic-rendered-ansi,artifacts,future-incompat futures_macro-3927f55cf91621ae.5ch9vxvn74xfbsh7re80ie1oa.rcgu.o 7543991641147detcc deql-scratch/dbs-Wl,--version-script=/tmp/rustcpflWNT/list libsyn-e1c96a7797b61fd0.rlib libquote-819bddae12a512e2.rlib (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

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