pay contract: rename handoff to intent

packages/contract/src/pay/DaimoPay.sol

@@ -13,10 +13,10 @@ import "./PayIntentFactory.sol";
 import "./TokenUtils.sol";
 
 // A Daimo Pay transfer has 4 steps:
-// 1. Alice sends (tokenIn, amountIn) to handoff address on chain A -- simple erc20 transfer
+// 1. Alice sends (tokenIn, amountIn) to intent address on chain A -- simple erc20 transfer
 // 2. Relayer swaps tokenIn to bridgeTokenIn and burns on chain A -- relayer runs this in sendAndSelfDestruct
 //    - relayer doesnt need approve or anything else, just quote and swap.
-//    - quote comes from the handoff address which commits to the destination bridgeTokenOut amount, and therefore bridgeTokenIn amount.
+//    - quote comes from the intent address which commits to the destination bridgeTokenOut amount, and therefore bridgeTokenIn amount.
 //    - relayer has to fetch swap from Uniswap or similar
 
 // Fork: fastFinish, then claim
@@ -121,7 +121,7 @@ contract DaimoPay {
     ) public {
         require(intent.toChainId == block.chainid, "DP: wrong chain");
 
-        // Calculate handoff address
+        // Calculate intent address
         address intentAddr = intentFactory.getIntentAddress(intent);
 
         // Optimistic fast finish is only for transfers which haven't already

packages/contract/src/pay/PayIntent.sol

@@ -136,7 +136,7 @@ contract PayIntentContract is Initializable {
             amount: amount
         });
 
-        // This use of SELFDESTRUCT is compatible with EIP-6780. Handoff
+        // This use of SELFDESTRUCT is compatible with EIP-6780. Intent
         // contracts are deployed, then destroyed in the same transaction.
         // solhint-disable-next-line
         selfdestruct(intent.escrow);

packages/contract/test/DaimoPay.t.sol

@@ -123,7 +123,7 @@ contract DaimoPayTest is Test {
         console.log("TestUSDC (toToken) address:", address(_toToken));
     }
 
-    function testGetHandoffAddr() public view {
+    function testGetIntentAddr() public view {
         PayIntent memory baseIntent = PayIntent({
             toChainId: _baseChainId,
             bridgeTokenOut: TokenAmount({token: _toToken, amount: _toAmount}),
@@ -446,7 +446,7 @@ contract DaimoPayTest is Test {
         // Wait for CCTP to relay the message
         vm.warp(block.timestamp + 20 minutes);
 
-        // CCTP receiveMessage() sends funds to the handoff address
+        // CCTP receiveMessage() sends funds to the intent address
         _toToken.transfer(BASE_INTENT_ADDR, _toAmount);
 
         // Then, LP claims the funds
@@ -470,7 +470,7 @@ contract DaimoPayTest is Test {
 
         dp.claimIntent({intent: intent, calls: new Call[](0)});
 
-        // LP received funds from handoff, and handoff is destroyed
+        // LP received funds from intent, and intent is destroyed
         assertEq(_toToken.balanceOf(BASE_INTENT_ADDR), 0);
         assertEq(_toToken.balanceOf(_lp), _lpToTokenInitBalance);
         assertEq(_toToken.balanceOf(_bob), _toAmount);
@@ -483,7 +483,7 @@ contract DaimoPayTest is Test {
         // Wait for CCTP to relay the message
         vm.warp(block.timestamp + 20 minutes);
 
-        // CCTP receiveMessage() sends funds to the handoff address
+        // CCTP receiveMessage() sends funds to the intent address
         _toToken.transfer(BASE_INTENT_ADDR, _toAmount);
 
         // Then, a third party calls claimIntent
@@ -514,7 +514,7 @@ contract DaimoPayTest is Test {
 
         dp.claimIntent({intent: intent, calls: new Call[](0)});
 
-        // LP doesn't receive funds, handoff is destroyed, and funds are sent
+        // LP doesn't receive funds, intent is destroyed, and funds are sent
         // to the final recipient
         assertEq(_toToken.balanceOf(BASE_INTENT_ADDR), 0);
         assertEq(_toToken.balanceOf(_lp), 0);