init

2025-05-19 20:36:21 -05:00
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+import { keccak256 } from "../crypto/index.js";
+import { concat, dataSlice, getBigInt, getBytes, encodeRlp, assertArgument } from "../utils/index.js";
+import { getAddress } from "./address.js";
+// http://ethereum.stackexchange.com/questions/760/how-is-the-address-of-an-ethereum-contract-computed
+/**
+ *  Returns the address that would result from a ``CREATE`` for %%tx%%.
+ *
+ *  This can be used to compute the address a contract will be
+ *  deployed to by an EOA when sending a deployment transaction (i.e.
+ *  when the ``to`` address is ``null``).
+ *
+ *  This can also be used to compute the address a contract will be
+ *  deployed to by a contract, by using the contract's address as the
+ *  ``to`` and the contract's nonce.
+ *
+ *  @example
+ *    from = "0x8ba1f109551bD432803012645Ac136ddd64DBA72";
+ *    nonce = 5;
+ *
+ *    getCreateAddress({ from, nonce });
+ *    //_result:
+ */
+export function getCreateAddress(tx) {
+    const from = getAddress(tx.from);
+    const nonce = getBigInt(tx.nonce, "tx.nonce");
+    let nonceHex = nonce.toString(16);
+    if (nonceHex === "0") {
+        nonceHex = "0x";
+    }
+    else if (nonceHex.length % 2) {
+        nonceHex = "0x0" + nonceHex;
+    }
+    else {
+        nonceHex = "0x" + nonceHex;
+    }
+    return getAddress(dataSlice(keccak256(encodeRlp([from, nonceHex])), 12));
+}
+/**
+ *  Returns the address that would result from a ``CREATE2`` operation
+ *  with the given %%from%%, %%salt%% and %%initCodeHash%%.
+ *
+ *  To compute the %%initCodeHash%% from a contract's init code, use
+ *  the [[keccak256]] function.
+ *
+ *  For a quick overview and example of ``CREATE2``, see [[link-ricmoo-wisps]].
+ *
+ *  @example
+ *    // The address of the contract
+ *    from = "0x8ba1f109551bD432803012645Ac136ddd64DBA72"
+ *
+ *    // The salt
+ *    salt = id("HelloWorld")
+ *
+ *    // The hash of the initCode
+ *    initCode = "0x6394198df16000526103ff60206004601c335afa6040516060f3";
+ *    initCodeHash = keccak256(initCode)
+ *
+ *    getCreate2Address(from, salt, initCodeHash)
+ *    //_result:
+ */
+export function getCreate2Address(_from, _salt, _initCodeHash) {
+    const from = getAddress(_from);
+    const salt = getBytes(_salt, "salt");
+    const initCodeHash = getBytes(_initCodeHash, "initCodeHash");
+    assertArgument(salt.length === 32, "salt must be 32 bytes", "salt", _salt);
+    assertArgument(initCodeHash.length === 32, "initCodeHash must be 32 bytes", "initCodeHash", _initCodeHash);
+    return getAddress(dataSlice(keccak256(concat(["0xff", from, salt, initCodeHash])), 12));
+}
+//# sourceMappingURL=contract-address.js.map