Create the SpecialAllocations structure

[lumtis]

Special allocation is a generic solution to represent shares of the campaign that are allocated for a specific purpose interpreted off-chain.

This solution allows to have accounts with a token balance in a custom initial genesis for the chain and having them tracked by the allocated shares of the campaign.

The client must manually verify the initial genesis of the chain is valid depending on the special allocation of the campaign.

Each campaign can have special allocations for the mainnet.

Two different special allocations identified:

• GenesisDistribution: coins distributed in genesis accounts in a custom initial genesis
• ClaimableAirdrop: coins that can be claimed as airdrop from a claim module

SpecialAllocations

Proposed structure:

type SpecialAllocations struct {
	GenesisDistribution  Shares
	ClaimableAirdrop      Shares
}

The type should implement TotalShares to get the total shares for special allocations

// SpecialAllocation implements a totalShares methods to return total shares of special allocation
func (as SpecialAllocations) TotalShares() Shares {
	return as.ClaimableAirdrop + as.GenesisDistribution
}

Store

We must determine if SpecialAllocations should have its own entry in the store:

SpecialAllocations: [campaignID] -> SpecialAllocations

Or if the type can be embedded in campaigns

type Campaign struct {
  ...
  SpecialAllocations SpecialAllocations
  ...
}

IMO the type is not large and could be embedded in the campaign