Handling errors in Effect's `tryPromise` can be a bit tricky if you're not familiar with how Effe...

export class PatriciaMerkleTreeDatasourceLive extends Effect.Service<PatriciaMerkleTreeDatasourceLive>()(
  "PatriciaMerkleTreeDatasourceLive",
  {
    dependencies: [PatriciaTrie.Default],
    effect: Effect.gen(function* () {
      const trie = yield* PatriciaTrie.trie;

      const insert = (address: string) =>
        Effect.gen(function* () {
          // return yield* new AlreadyExistsError({ address });
          yield* Effect.tryPromise({
            try: () => trie.insert(address, "0"),
            catch: () => new AlreadyExistsError({ address }),
          });
          return trie.hash.toString("hex");
        });

      return {
        insert,
      };
    }),
  },
) {}