File: LockManager.sol
144:     function proposeUSDPrice(
145:         uint256 _price,
146:         address[] calldata _contracts
147:     )
148:         external
149:         onlyOneOfRoles(
150:             [
151:                 Role.PriceFeed_1,
152:                 Role.PriceFeed_2,
153:                 Role.PriceFeed_3,
154:                 Role.PriceFeed_4,
155:                 Role.PriceFeed_5
156:             ]
157:         )
158:     {   
159:        
160:         if (usdUpdateProposal.proposer != address(0))
161:             revert ProposalInProgressError();
162:         if (_contracts.length == 0) revert ProposalInvalidContractsError();
163: 
164:         delete usdUpdateProposal;
165: 
166:         // Approvals will use this because when the struct is deleted the approvals remain
167:         ++_usdProposalId;
168: 
169:         usdUpdateProposal.proposedDate = uint32(block.timestamp);
170:         usdUpdateProposal.proposer = msg.sender;
171:         usdUpdateProposal.proposedPrice = _price;
172:         usdUpdateProposal.contracts = _contracts;
173:         usdUpdateProposal.approvals[msg.sender] = _usdProposalId; 
174:         usdUpdateProposal.approvalsCount++;
175: 
176:         emit ProposedUSDPrice(msg.sender, _price);
177:     }
