I'd like to use the Polkadot CLI to create a chainspec with specific user balances pre-seeded. I'd like to be able to do this for any of the dev runtimes.
In the case of the polkadot dev runtime, I run
polkadot build-spec --dev. In the case of others, I run
polkadot build-spec --chain=<runtime-name-here>-local. I capture the output in a file, and then overwrite its
genesis.runtime.balances.balances with a list of
[ss58, amount] tuples.
Then I write the updated chainspec to my fs, and run it with
polkadot --chain <path-to-spec>. In the case of Westend, I'm able to retrieve a test user balance. All others fail. Also, westend txs stall.