The Görli testnet currently used by Threshold/Keep for development purposes is
planned to become deprecated with the end of year 2023. The testnet that is
planned to replace it is called
[Holešky](https://github.com/eth-clients/holesky), however it's not yet
available - it's planned it will become widely accessible on Oct 1, 2023
([source](https://everstake.one/blog/new-ethereum-testnet-holesky-all-you-need-to-know-now)).
Switching our infrastructure to support new testnet is quite time consuming, so
moving directly from Görli to Holešky may be quite risky, especially if there
would be some delays in the date of Holešky genesis (not meeting the planned
timelines is not a rare occurrence in the Ethereum space). As a solution, we
decided to switch first to another testnet that is currently live - Sepolia.
This testnet's EOL is planned for 2026, which gives us plenty of time to move to
Holešky before Sepolia gets deprecated.

In the commit `c58ee5c078cbe850e678b85a136a4841d1732615` we've started
modificating Token Dashboard config to make it run on the Sepolia testnet. In
this commit we continue that work. Some configs are still missing - we mark them
as TODO.

The merkle drop contract was deployed on Sepolia under the
`0x4621a14bbB5a53f79Ea532bdc032b8ACc383B153` address
(https://sepolia.etherscan.io/address/0x4621a14bbB5a53f79Ea532bdc032b8ACc383B153).

The `SimplePreApplication` stub contract was deployed on Sepolia under the
`0x471EA40981D278fb3Cb55587e94ac549aad1ACA9` address
(https://sepolia.etherscan.io/address/0x471EA40981D278fb3Cb55587e94ac549aad1ACA9).

We're bringing back the functionality removed in commit
17e2a0b. Recently we've changed the dapp's
`@keep-network/tbtc-v2.ts` dependency to `^2.3.0`, which results in the
introduction of the `@threshold-network/[email protected]` package in the
`yarn.lock`. That package contains a `prepare-dependencies.sh` script
which sometimes causes problems during install/upgrade of the dapp dependencies.
As a workaround we install dashboard dependencies with `--ignore-scripts` flag.
This way we don't run the misbehaving script (we don't need to run it in this
project). In order to run the postinstall scripts related strictly to the
`@threshold-network/token-dashboard` project, we manually run the post-install
script by executing `yarn run postinstall`.

The workaround for the `expected manifest` problem must resolve the
specific version for both `sepolia` and `dapp-development-sepolia` tags,
depending on the target environment.