add rpc requirements to docs

docs/pages/developers/network/relayer.mdx

@@ -162,7 +162,7 @@ The configuration file is a toml file that at the moment, that expects the follo
 [hyperbridge]
 state_machine = "KUSAMA-4009"
 # Hyperbridge node ws rpc endpoint.
-rpc_ws = "ws://127.0.0.1:9944" # example endpoint
+rpc_ws = "ws://127.0.0.1:9944" # example endpoint
 # Sets the maximum size of an rpc request or response in bytes defaults to 150mb
 max_rpc_payload_size = 150000000
 # (Optional) initial height
@@ -175,7 +175,7 @@ poll_interval = 10
 
 # Relayer config, required
 [relayer]
-# Define your profitability configuration. 0 -> 0% i.e relay all requests, even unprofitable ones. 1 -> 1%. ie fees provided for requests must be profitable by at least 1%. etc.
+# Define your profitability configuration. 0 -> 0% i.e relay all requests, even unprofitable ones. 1 -> 1%. ie fees provided for requests must be profitable by at least 1%. etc.
 minimum_profit_percentage = 0
 # (Optional) If not empty, will filter requests to be delivered by originating module identifier (eg contract address/pallet ids)
 module_filter = []
@@ -206,7 +206,7 @@ disable_fee_accumulation = false
 type = "evm"
 # State machine identifier for this evm chain.
 # Must be specified as:
-# - "EVM-{chainId}"
+# - "EVM-{chainId}"
 
 # The possible values:
 
@@ -247,7 +247,7 @@ ismp_host = ""
 # and will be queried at once. This might be needed if you encounter rate limits
 # from your rpc provider.
 query_batch_size = 1000
-# hex-encoded private key for the relayer account on this chain
+# hex-encoded private key for the relayer account on this chain
 signer = ""
 # (Optional)
 # Maximum number of concurrent rpc requests that can be used when tracing. If not supplied
@@ -278,21 +278,21 @@ poll_interval = 10
 
 [substrate]
 type = "substrate"
-# The state machine identifier for this substrate based chain.
-# must be one of:
-# - "POLKADOT-{paraId}"
-# - "KUSAMA-{paraId}"
+# The state machine identifier for this substrate based chain.
+# must be one of:
+#  "POLKADOT-{paraId}"
+#  "KUSAMA-{paraId}"
 state_machine = "KUSAMA-4009"
 # Hashing can be "Keccak" or "Blake2"
 hashing = "Blake2"
 # substrate node ws(s) rpc endpoint.
-rpc_ws = "ws://127.0.0.1:9944" # example endpoint
+rpc_ws = "ws://127.0.0.1:9944" # example endpoint
 # Configures the maximum size of an rpc request/response in bytes
 max_rpc_payload_size = 150000000 # 150MB
 # The consensus state identifier for this chain on hyperbridge.
-# Only parachains are supported for now
+# Only parachains are supported for now
 consensus_state_id = "PARA"
-# hex-encoded private key for the relayer account on this chain
+# hex-encoded private key for the relayer account on this chain
 signer = ""
 # (Optional) Frequency with which to query the chain for new state machine updates,
 poll_interval = 10
@@ -306,6 +306,15 @@ It is optional to provide the configuration option for any of the connected chai
 
 You can obtain the required etherscan API key by following [this guide](https://docs.etherscan.io/getting-started/viewing-api-usage-statistics) for the appropriate network. Do note that since Ethereum and its L2s all use Ether as the gas token. They can all share the same etherscan API key.
 
+### RPC Endpoint Requirements
+
+The tesseract relayer makes use of rpc methods that may not be exposed by default. For evm chains, ensure that the RPC API supports the following namespaces:
+
+ - [`debug`](https://geth.ethereum.org/docs/interacting-with-geth/rpc/ns-debug)
+ - [`eth`](https://geth.ethereum.org/docs/interacting-with-geth/rpc/ns-eth)
+
+For substrate chains, ensure the RPC [enables unsafe rpc methods](https://docs.substrate.io/build/remote-procedure-calls/#safe-and-unsafe-rpc-methods).
+
 ### Contract addresses
 
 You can find the addresses for the `IsmpHost` contracts for [mainnet](/developers/evm/contracts/mainnet) and [testnet](/developers/evm/contracts/testnet)