Validator joining flow

[JesseAbram]

Core

• Set parameters for size of signer group and T of N
• Add Signer groups to chain
• Get randomness to select new signer from validators on session refresh
• Rotate Signers
• Create ocw message to do reshare
• Allow nodes to call in to confirm (holding new key share in seperate storage slot)
• On confirmation have chain update new signers
• When all confirmed (or T idk) create another message to rotate new keyshare to old keyshare, delete old keyshare Should deleting and rotating a parent key be a one or two step process #968
• Validate new_reshare pathway
• Delete old key if not a new signer (includes making the test for reshare in TSS actually rotate the signers not just do a reshare)
• Replace SIGNING_PARTY_SIZE to TOTAL_SIGNERS or SIGNER_THRESHOLD

Extras

• Have next_signers and signers bounded by T and N in parameters
• Store current threshold info with verifying key onchain
• Add checks to what a signer needs to have before selected (balance etc) List for checks on what a validator should have before selected for signer  #998
• Have a signature or something in confirming reshare done correctly Key reshare test should demonstrate signing a message following a reshare #981
• Determine how initial signers are selected and set parameter bound on configs (should be in jumpstart)
• Do not allow validator unbonding if they are a signer Handle unbonding and slashing while a signer  #942
• Refactor reshare to be more resuable (reshare and refresh pathways should be mostly the same
• Add test for new signer without key added to network (currently they all have keys

[JesseAbram]

first four handled in #938

[JesseAbram]

As all of the task still left are open for input, have been pulled out to their own issues and as I would consider them enhancements I am closing this as done