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// Copyright (C) 2019-2023 Algorand, Inc.
// This file is part of go-algorand
//
// go-algorand is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// go-algorand is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with go-algorand. If not, see <https://www.gnu.org/licenses/>.
package agreement
import "fmt"
type voteAggregatorContract struct {
}
func (c voteAggregatorContract) pre(p player, in event) (pre []error) {
if in.t() == voteAccepted {
if in.(voteAcceptedEvent).Vote.R.Step == propose {
pre = append(pre, fmt.Errorf("incoming event has step propose"))
}
}
return
}
func (c voteAggregatorContract) post(p player, in, out event) (errs []error) {
// prop 1: voteFiltered directly preceded by votePresent or voteVerified
if out.t() == voteFiltered {
if in.t() != votePresent && in.t() != voteVerified {
errs = append(errs, fmt.Errorf("voteFiltered event has no corresponding request"))
}
}
// prop 2: voteMalformed directly preceded by voteVerified
// (for intuition, we can think of voteVerified as coming straight from the verifier;
// hence voteMalformed is generated by the vote machine, not the player, who is just
// forwarding the message)
if out.t() == voteMalformed {
if in.t() != voteVerified {
errs = append(errs, fmt.Errorf("voteMalformed event has no corresponding voteVerified request"))
}
}
// prop 3: voteThresholdEvents directly preceded by voteVerified or bundleVerified
if out.t() == softThreshold || out.t() == certThreshold || out.t() == nextThreshold {
if in.t() != voteVerified && in.t() != bundleVerified {
errs = append(errs, fmt.Errorf("threshold event has no corresponding voteVerified/bundleVerified request"))
}
}
// Relay rule contracts should go here...
return errs
}
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