File: LockManager.sol
181:     function approveUSDPrice(
182:         uint256 _price
183:     )
184:         external
185:         onlyOneOfRoles(
186:             [
187:                 Role.PriceFeed_1,
188:                 Role.PriceFeed_2,
189:                 Role.PriceFeed_3,
190:                 Role.PriceFeed_4,
191:                 Role.PriceFeed_5
192:             ]
193:         )
194:     {
195:         if (usdUpdateProposal.proposer == address(0)) revert NoProposalError();
196:         
197:         if (usdUpdateProposal.proposer == msg.sender)
198:             revert ProposerCannotApproveError();
199:         if (usdUpdateProposal.approvals[msg.sender] == _usdProposalId)
200:             revert ProposalAlreadyApprovedError();
201:         if (usdUpdateProposal.proposedPrice != _price)
202:             revert ProposalPriceNotMatchedError();
203: 
204:         usdUpdateProposal.approvals[msg.sender] = _usdProposalId;
205:         usdUpdateProposal.approvalsCount++;
206: 
207:         if (usdUpdateProposal.approvalsCount >= APPROVE_THRESHOLD) {
208:             _execUSDPriceUpdate();
209:         }
210: 
211:         emit ApprovedUSDPrice(msg.sender);
212:     }
