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Prevent double signing. #24

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Prevent double signing. #24

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15 changes: 15 additions & 0 deletions 3.restricted-mint-multisig/imports/multisig.leo
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Original file line number Diff line number Diff line change
Expand Up @@ -4,6 +4,13 @@ program multisig.aleo {

mapping required_signatures: bool => u64;
mapping proposals: Proposal => u64;
mapping block: ProposalSigner => bool;

struct ProposalSigner {
proposal: Proposal,
signer: address,
}

mapping signers: address => bool;

struct Proposal {
Expand Down Expand Up @@ -40,9 +47,17 @@ program multisig.aleo {
}

finalize sign(caller: address, proposal: Proposal) {
let aux: ProposalSigner = ProposalSigner {
proposal: proposal,
signer: caller,
};
let is_blocked: bool = Mapping::get_or_use(block, aux, false);
assert_eq(is_blocked, false);

assert(Mapping::get(signers, caller));
let signatures: u64 = Mapping::get_or_use(proposals, proposal, 0u64);
Mapping::set(proposals, proposal, signatures + 1u64);
Mapping::set(block, aux, true);
}

transition add_signer(ticket_: ticket, new_signer: address) {
Expand Down