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23 lines
1.4 KiB
Markdown
23 lines
1.4 KiB
Markdown
# Ranked collective system
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This is a membership pallet providing a `Tally` implementation ready for use with polling
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systems such as the Referenda pallet. Members each have a rank, with zero being the lowest.
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There is no complexity limitation on either the number of members at a rank or the number of
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ranks in the system thus allowing potentially public membership. A member of at least a given
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rank can be selected at random in O(1) time, allowing for various games to constructed using
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this as a primitive. Members may only be promoted and demoted by one rank at a time, however
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all operations (save one) are O(1) in complexity. The only operation which is not O(1) is the
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`remove_member` since they must be removed from all ranks from the present down to zero.
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Different ranks have different voting power, and are able to vote in different polls. In general
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rank privileges are cumulative. Higher ranks are able to vote in any polls open to lower ranks.
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Similarly, higher ranks always have at least as much voting power in any given poll as lower
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ranks.
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Two `Config` trait items control these "rank privileges": `MinRankOfClass` and `VoteWeight`.
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The first controls which ranks are allowed to vote on a particular class of poll. The second
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controls the weight of a vote given the voters rank compared to the minimum rank of the poll.
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An origin control, `EnsureRank`, ensures that the origin is a member of the collective of at
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least a particular rank.
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