[User-Story] Bounced cheque

[Eknir]

Rationale

When you have a peer whose chequebook has been bounced (only possible when the peer has written more cheques than the chequebook can cover), you want to disconnect from him because of the following reasons:

• Probably, your outstanding balance and any new cheques won't be cashable
• The peer has provably acted maliciously
• If all peers disconnect, this is a big incentive against ever over-promising on cheques

User-Story

As a Swarm node, I want to never connect to and automatically disconnect from a peer who's chequebook has bounced, such that I am more certain of ever receiving my uncashed balance and I contribute to incentivizing nodes never to overpromise on cheques.

Epic links

#67

Acceptance criteria

• We don't connect to a node whose chequebook has ever bounced
• We attempt to cash balance if possible and disconnect automatically from a node whose chequebook has ever bounced
• We write off any outstanding and uncashable debt from a node whose chequebook has ever bounced.

Requirements

Blacklist. In the meantime, we just disconnect.

Work estimate

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