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system/node_modules/ethers/src.ts/hash/solidity.ts

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+import { getAddress } from "../address/index.js";
+import {
+    keccak256 as _keccak256, sha256 as _sha256
+} from "../crypto/index.js";
+import {
+    concat, dataLength, getBytes, hexlify, toBeArray, toTwos, toUtf8Bytes, zeroPadBytes, zeroPadValue,
+    assertArgument
+} from "../utils/index.js";
+
+
+const regexBytes = new RegExp("^bytes([0-9]+)$");
+const regexNumber = new RegExp("^(u?int)([0-9]*)$");
+const regexArray = new RegExp("^(.*)\\[([0-9]*)\\]$");
+
+
+function _pack(type: string, value: any, isArray?: boolean): Uint8Array {
+    switch(type) {
+        case "address":
+            if (isArray) { return getBytes(zeroPadValue(value, 32)); }
+            return getBytes(getAddress(value));
+        case "string":
+            return toUtf8Bytes(value);
+        case "bytes":
+            return getBytes(value);
+        case "bool":
+            value = (!!value ? "0x01": "0x00");
+            if (isArray) { return getBytes(zeroPadValue(value, 32)); }
+            return getBytes(value);
+    }
+
+    let match =  type.match(regexNumber);
+    if (match) {
+        let signed = (match[1] === "int");
+        let size = parseInt(match[2] || "256")
+
+        assertArgument((!match[2] || match[2] === String(size)) && (size % 8 === 0) && size !== 0 && size <= 256, "invalid number type", "type", type);
+
+        if (isArray) { size = 256; }
+
+        if (signed) { value = toTwos(value, size); }
+
+        return getBytes(zeroPadValue(toBeArray(value), size / 8));
+    }
+
+    match = type.match(regexBytes);
+    if (match) {
+        const size = parseInt(match[1]);
+
+        assertArgument(String(size) === match[1] && size !== 0 && size <= 32, "invalid bytes type", "type", type);
+        assertArgument(dataLength(value) === size, `invalid value for ${ type }`, "value", value);
+
+        if (isArray) { return getBytes(zeroPadBytes(value, 32)); }
+        return value;
+    }
+
+    match = type.match(regexArray);
+    if (match && Array.isArray(value)) {
+        const baseType = match[1];
+        const count = parseInt(match[2] || String(value.length));
+        assertArgument(count === value.length, `invalid array length for ${ type }`, "value", value);
+
+        const result: Array<Uint8Array> = [];
+        value.forEach(function(value) {
+            result.push(_pack(baseType, value, true));
+        });
+        return getBytes(concat(result));
+    }
+
+    assertArgument(false, "invalid type", "type", type)
+}
+
+// @TODO: Array Enum
+
+/**
+ *   Computes the [[link-solc-packed]] representation of %%values%%
+ *   respectively to their %%types%%.
+ *
+ *   @example:
+ *       addr = "0x8ba1f109551bd432803012645ac136ddd64dba72"
+ *       solidityPacked([ "address", "uint" ], [ addr, 45 ]);
+ *       //_result:
+ */
+export function solidityPacked(types: ReadonlyArray<string>, values: ReadonlyArray<any>): string {
+    assertArgument(types.length === values.length, "wrong number of values; expected ${ types.length }", "values", values);
+
+    const tight: Array<Uint8Array> = [];
+    types.forEach(function(type, index) {
+        tight.push(_pack(type, values[index]));
+    });
+    return hexlify(concat(tight));
+}
+
+/**
+ *   Computes the [[link-solc-packed]] [[keccak256]] hash of %%values%%
+ *   respectively to their %%types%%.
+ *
+ *   @example:
+ *       addr = "0x8ba1f109551bd432803012645ac136ddd64dba72"
+ *       solidityPackedKeccak256([ "address", "uint" ], [ addr, 45 ]);
+ *       //_result:
+ */
+export function solidityPackedKeccak256(types: ReadonlyArray<string>, values: ReadonlyArray<any>): string {
+    return _keccak256(solidityPacked(types, values));
+}
+
+/**
+ *   Computes the [[link-solc-packed]] [[sha256]] hash of %%values%%
+ *   respectively to their %%types%%.
+ *
+ *   @example:
+ *       addr = "0x8ba1f109551bd432803012645ac136ddd64dba72"
+ *       solidityPackedSha256([ "address", "uint" ], [ addr, 45 ]);
+ *       //_result:
+ */
+export function solidityPackedSha256(types: ReadonlyArray<string>, values: ReadonlyArray<any>): string {
+    return _sha256(solidityPacked(types, values));
+}