The PoW Solution on Namada
In order to combat the "costlessness of blockspace" problem with a testnet, and hence prevent DOS attacks as a result, when a Namada account does not have the required fees to pay for a transaction, the user must complete a Proof of Work challenge. The difficulty of this challenge is a parameter set by governance, and will dictate the (average) computational expenditure needed in order to complete the challenge.
Note that this current fix will be not be included in Mainnet as it is circumstantial to testnet.
In order to avoid having to complete endless Proof of Work challenges, we recommend using the faucet to fund the implicit account as one of a user's first transactions:
namada client transfer \ --source faucet \ --target keysha \ --token NAM \ --amount 1000 \ --signing-keys keysha
which will allow the key with alias
keysha to sign future transactions and pay for any further fees.
The PoW Faucet
The Faucet on Namada will always require users to complete a PoW challenge, regardless of the balance of the implicit account.