Merge pull request #87 from gerrrg/add-flashloans

add flash loans page from old dev docs
balancer · May 25, 2023 · 1958b8e · 1958b8e
2 parents f3bb46d + 32bb57d
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diff --git a/docs/guides/README.md b/docs/guides/README.md
@@ -6,6 +6,7 @@ heroImage: /images/backgrounds/blue.png
 
 ## Arbitrageurs
 
+- [Flash Loans](/guides/arbitrageurs/flash-loans.md)
 - [Get Spot Price of a Pool](/guides/arbitrageurs/get-spot-price.md)
 
 ## Aggregators

diff --git a/docs/guides/arbitrageurs/flash-loans.md b/docs/guides/arbitrageurs/flash-loans.md
@@ -0,0 +1,36 @@
+# Flash Loans
+
+## Overview
+
+Since the Vault holds all tokens for all pools, the consolidated token balances are available as Flash Loans.
+
+## Example Code
+
+```solidity
+pragma solidity ^0.7.0;
+
+import "@balancer-labs/v2-vault/contracts/interfaces/IVault.sol";
+import "@balancer-labs/v2-vault/contracts/interfaces/IFlashLoanRecipient.sol";
+
+contract FlashLoanRecipient is IFlashLoanRecipient {
+    IVault private constant vault = "0xBA12222222228d8Ba445958a75a0704d566BF2C8";
+
+    function makeFlashLoan(
+        IERC20[] memory tokens,
+        uint256[] memory amounts,
+        bytes memory userData
+    ) external {
+      vault.flashLoan(this, tokens, amounts, userData);
+    }
+
+    function receiveFlashLoan(
+        IERC20[] memory tokens,
+        uint256[] memory amounts,
+        uint256[] memory feeAmounts,
+        bytes memory userData
+    ) external override {
+        require(msg.sender == vault);
+        ...
+    }
+}
+```