Fixing "Invalid" error (#405)

The source of the error was, that I treated the observables the wrong way.
I expected `submitAndWatch()` to return a chain of events, to which I could subscribe from a bunch of sources, while it actually led to side effects being multiplied in the sources.
`shareReplay()` returns a multicast observable that actually behaves the way I expected it to.

src/dripper/polkadot/PolkadotActions.ts

@@ -1,6 +1,6 @@
 import { ss58Address } from "@polkadot-labs/hdkd-helpers";
 import { AccountId, Binary } from "polkadot-api";
-import { filter, firstValueFrom } from "rxjs";
+import { filter, firstValueFrom, shareReplay } from "rxjs";
 
 import { config } from "src/config";
 import { logger } from "src/logger";
@@ -101,7 +101,7 @@ export class PolkadotActions {
 
     // client.submit(tx) waits for the finalized value, which might be important for real money,
     // but for the faucet drips, early respond is better UX
-    const submit$ = client.submitAndWatch(tx);
+    const submit$ = client.submitAndWatch(tx).pipe(shareReplay(1));
 
     const hash = (await firstValueFrom(submit$.pipe(filter((value) => value.type === "broadcasted")))).txHash;
 

yarn.lock

@@ -2342,13 +2342,6 @@ bl@^4.0.3:
     inherits "^2.0.4"
     readable-stream "^3.4.0"
 
-blake2@^5.0.0:
-  version "5.0.0"
-  resolved "https://registry.yarnpkg.com/blake2/-/blake2-5.0.0.tgz#6306e49d974fb051b6fb2aad669307b9838bfbaa"
-  integrity sha512-MLpq1DwBB9rC0IHuRc2gXLEAeNNTTYHEtvYCA5lK4RmoUPRmQLSLQrwgJvou62BvH9KP7whe8n+xxw45++fnYg==
-  dependencies:
-    nan "^2.17.0"
-
 [email protected], body-parser@^1.20.0:
   version "1.20.2"
   resolved "https://registry.yarnpkg.com/body-parser/-/body-parser-1.20.2.tgz#6feb0e21c4724d06de7ff38da36dad4f57a747fd"