From 74fc49cd4521f02362904d476343d03432edb96d Mon Sep 17 00:00:00 2001
From: Chris Duncan <chris@codecow.com>
Date: Fri, 7 Aug 2026 12:33:40 -0700
Subject: [PATCH] Narrow block processing acceptable subtypes since epoch
 blocks should not be constructible and open blocks are just special receives.

---
 src/lib/block/index.ts | 17 ++++++++++++-----
 src/lib/rpc/process.ts |  2 +-
 2 files changed, 13 insertions(+), 6 deletions(-)

diff --git a/src/lib/block/index.ts b/src/lib/block/index.ts
index 440b83a..de8984b 100644
--- a/src/lib/block/index.ts
+++ b/src/lib/block/index.ts
@@ -157,6 +157,16 @@ export class Block {
 		return _change(this, representative)
 	}
 
+	/**
+	 * Specialized block only used for setting account `frontier` when refreshing
+	 * from the network. Epoch blocks are created by Nano Foundation developers.
+	 *
+	 * @returns {Block} This block unchanged
+	 */
+	epoch (): Block {
+		return this
+	}
+
 	/**
 	 * Alias for `receive()`. Zeros out `previous` as required for initial recieve
 	 * blocks.
@@ -232,12 +242,9 @@ export class Block {
 		}
 		try {
 			const res = await rpc.post('process', data)
-			if (res == null || typeof res !== 'object' || !('hash' in res) || typeof res.hash !== 'string') {
-				throw new Error('RPC process request received incomplete response', { cause: res })
-			}
 			return res.hash
-		} catch (err) {
-			throw new Error('Block could not be processed', { cause: err })
+		} catch (err: any) {
+			throw new Error('Block could not be processed', { cause: err.message })
 		}
 	}
 
diff --git a/src/lib/rpc/process.ts b/src/lib/rpc/process.ts
index 8c69b30..cd6fa4f 100644
--- a/src/lib/rpc/process.ts
+++ b/src/lib/rpc/process.ts
@@ -10,7 +10,7 @@ export type ProcessRequest = {
 	block: BlockInfoContents
 	force: false
 	json_block: true
-	subtype: 'change' | 'epoch' | 'open' | 'receive' | 'send'
+	subtype: 'change' | 'receive' | 'send'
 }
 
 export type ProcessResponse = {
-- 
2.52.0