MetaTxRelayer
metaIssueBounty(): creates a new bounty
metaIssueAndContribute(): creates a new bounty and deposits token amounts
metaContribute(): contribute tokens to an existing bounty
metaRefundContribution(): allows issuers to refund contributions made to a bounty, but only if it hasn't been paid out and deadline has elapsed
metaRefundContributions(): allow users to refund their contirbutions in bulk, but only if it hasn't been paid out and deadline has elapsed
metaDrainBounty(): drain funds from a bounty, but only if any payments haven't been made
metaPerformAction(): perform a generalized action, such as applying for it (useful for marketplace specific actions you want to record)
metaFulfillBounty(): allow contributors to fulfill the bounty to get paid out
metaUpdateFulfillment(): allow contributors to update their fulfillment submission
metaAcceptFulfillment(): allow any approver to accept a given submission
metaFulfillAndAccept(): allow any approver to fulfill and accept submission simultaneously (useful if fulfillments are off chain)
metaChangeBounty(): allow issuers to change any data in the bounty
metaChangeIssuer(): allow issuers to change approver of the bounty
metaChangeIssuerAndApprover(): allow issuers to change approver and issuer of the bounty
metaChangeData(): allow issuers to change the ipfs data hash with bounty data
metaChangeDeadline(): allow issuers to change deadline
metaAddIssuers(): allow issuer to add another issuer to the bounty
metaAddApprovers(): allow issuer to add an approver for the bounty