updated public to external for the functions

docs/examples/blind-auction.rst

@@ -79,7 +79,7 @@ to receive their money - contracts cannot activate themselves.
         /// together with this transaction.
         /// The value will only be refunded if the
         /// auction is not won.
-        function bid() public payable {
+        function bid() external payable {
             // No arguments are necessary, all
             // information is already part of
             // the transaction. The keyword payable
@@ -113,7 +113,7 @@ to receive their money - contracts cannot activate themselves.
         }
 
         /// Withdraw a bid that was overbid.
-        function withdraw() public returns (bool) {
+        function withdraw() external returns (bool) {
             uint amount = pendingReturns[msg.sender];
             if (amount > 0) {
                 // It is important to set this to zero because the recipient
@@ -132,7 +132,7 @@ to receive their money - contracts cannot activate themselves.
 
         /// End the auction and send the highest bid
         /// to the beneficiary.
-        function auctionEnd() public {
+        function auctionEnd() external {
             // It is a good guideline to structure functions that interact
             // with other contracts (i.e. they call functions or send Ether)
             // into three phases:
@@ -261,7 +261,7 @@ invalid bids.
         /// still make the required deposit. The same address can
         /// place multiple bids.
         function bid(bytes32 _blindedBid)
-            public
+            external
             payable
             onlyBefore(biddingEnd)
         {
@@ -275,11 +275,11 @@ invalid bids.
         /// correctly blinded invalid bids and for all bids except for
         /// the totally highest.
         function reveal(
-            uint[] memory _values,
-            bool[] memory _fake,
-            bytes32[] memory _secret
+            uint[] calldata _values,
+            bool[] calldata _fake,
+            bytes32[] calldata _secret
         )
-            public
+            external
             onlyAfter(biddingEnd)
             onlyBefore(revealEnd)
         {
@@ -311,7 +311,7 @@ invalid bids.
         }
 
         /// Withdraw a bid that was overbid.
-        function withdraw() public {
+        function withdraw() external {
             uint amount = pendingReturns[msg.sender];
             if (amount > 0) {
                 // It is important to set this to zero because the recipient
@@ -327,7 +327,7 @@ invalid bids.
         /// End the auction and send the highest bid
         /// to the beneficiary.
         function auctionEnd()
-            public
+            external
             onlyAfter(revealEnd)
         {
             if (ended) revert AuctionEndAlreadyCalled();

docs/examples/micropayment.rst

@@ -151,7 +151,7 @@ The full contract
 
         constructor() payable {}
 
-        function claimPayment(uint256 amount, uint256 nonce, bytes memory signature) public {
+        function claimPayment(uint256 amount, uint256 nonce, bytes memory signature) external {
             require(!usedNonces[nonce]);
             usedNonces[nonce] = true;
 
@@ -164,7 +164,7 @@ The full contract
         }
 
         /// destroy the contract and reclaim the leftover funds.
-        function shutdown() public {
+        function shutdown() external {
             require(msg.sender == owner);
             selfdestruct(payable(msg.sender));
         }
@@ -357,7 +357,7 @@ The full contract
         /// the recipient can close the channel at any time by presenting a
         /// signed amount from the sender. the recipient will be sent that amount,
         /// and the remainder will go back to the sender
-        function close(uint256 amount, bytes memory signature) public {
+        function close(uint256 amount, bytes memory signature) external {
             require(msg.sender == recipient);
             require(isValidSignature(amount, signature));
 
@@ -366,7 +366,7 @@ The full contract
         }
 
         /// the sender can extend the expiration at any time
-        function extend(uint256 newExpiration) public {
+        function extend(uint256 newExpiration) external {
             require(msg.sender == sender);
             require(newExpiration > expiration);
 
@@ -375,7 +375,7 @@ The full contract
 
         /// if the timeout is reached without the recipient closing the channel,
         /// then the Ether is released back to the sender.
-        function claimTimeout() public {
+        function claimTimeout() external {
             require(block.timestamp >= expiration);
             selfdestruct(sender);
         }

docs/examples/modular.rst

@@ -39,29 +39,29 @@ and the sum of all balances is an invariant across the lifetime of the contract.
         event Transfer(address from, address to, uint amount);
         event Approval(address owner, address spender, uint amount);
 
-        function transfer(address to, uint amount) public returns (bool success) {
+        function transfer(address to, uint amount) external returns (bool success) {
             balances.move(msg.sender, to, amount);
             emit Transfer(msg.sender, to, amount);
             return true;
 
         }
 
-        function transferFrom(address from, address to, uint amount) public returns (bool success) {
+        function transferFrom(address from, address to, uint amount) external returns (bool success) {
             require(allowed[from][msg.sender] >= amount);
             allowed[from][msg.sender] -= amount;
             balances.move(from, to, amount);
             emit Transfer(from, to, amount);
             return true;
         }
 
-        function approve(address spender, uint tokens) public returns (bool success) {
+        function approve(address spender, uint tokens) external returns (bool success) {
             require(allowed[msg.sender][spender] == 0, "");
             allowed[msg.sender][spender] = tokens;
             emit Approval(msg.sender, spender, tokens);
             return true;
         }
 
-        function balanceOf(address tokenOwner) public view returns (uint balance) {
+        function balanceOf(address tokenOwner) external view returns (uint balance) {
             return balances[tokenOwner];
         }
     }

docs/examples/safe-remote.rst

@@ -87,7 +87,7 @@ you can use state machine-like constructs inside a contract.
         /// Can only be called by the seller before
         /// the contract is locked.
         function abort()
-            public
+            external
             onlySeller
             inState(State.Created)
         {
@@ -105,7 +105,7 @@ you can use state machine-like constructs inside a contract.
         /// The ether will be locked until confirmReceived
         /// is called.
         function confirmPurchase()
-            public
+            external
             inState(State.Created)
             condition(msg.value == (2 * value))
             payable
@@ -118,7 +118,7 @@ you can use state machine-like constructs inside a contract.
         /// Confirm that you (the buyer) received the item.
         /// This will release the locked ether.
         function confirmReceived()
-            public
+            external
             onlyBuyer
             inState(State.Locked)
         {
@@ -134,7 +134,7 @@ you can use state machine-like constructs inside a contract.
         /// This function refunds the seller, i.e.
         /// pays back the locked funds of the seller.
         function refundSeller()
-            public
+            external
             onlySeller
             inState(State.Release)
         {

docs/examples/voting.rst

@@ -82,7 +82,7 @@ of votes.
 
         // Give `voter` the right to vote on this ballot.
         // May only be called by `chairperson`.
-        function giveRightToVote(address voter) public {
+        function giveRightToVote(address voter) external {
             // If the first argument of `require` evaluates
             // to `false`, execution terminates and all
             // changes to the state and to Ether balances
@@ -106,7 +106,7 @@ of votes.
         }
 
         /// Delegate your vote to the voter `to`.
-        function delegate(address to) public {
+        function delegate(address to) external {
             // assigns reference
             Voter storage sender = voters[msg.sender];
             require(!sender.voted, "You already voted.");
@@ -146,7 +146,7 @@ of votes.
 
         /// Give your vote (including votes delegated to you)
         /// to proposal `proposals[proposal].name`.
-        function vote(uint proposal) public {
+        function vote(uint proposal) external {
             Voter storage sender = voters[msg.sender];
             require(sender.weight != 0, "Has no right to vote");
             require(!sender.voted, "Already voted.");
@@ -176,7 +176,7 @@ of votes.
         // Calls winningProposal() function to get the index
         // of the winner contained in the proposals array and then
         // returns the name of the winner
-        function winnerName() public view
+        function winnerName() external view
                 returns (bytes32 winnerName_)
         {
             winnerName_ = proposals[winningProposal()].name;