Add Skynet support (ethers-io#2853, ethers-io#2866).

Author: ricmoo

packages/providers/package.json

@@ -17,6 +17,7 @@
     "@ethersproject/abstract-provider": "^5.6.0",
     "@ethersproject/abstract-signer": "^5.6.0",
     "@ethersproject/address": "^5.6.0",
+    "@ethersproject/base64": "^5.6.0",
     "@ethersproject/basex": "^5.6.0",
     "@ethersproject/bignumber": "^5.6.0",
     "@ethersproject/bytes": "^5.6.0",

packages/providers/src.ts/base-provider.ts

@@ -4,6 +4,7 @@ import {
     Block, BlockTag, BlockWithTransactions, EventType, Filter, FilterByBlockHash, ForkEvent,
     Listener, Log, Provider, TransactionReceipt, TransactionRequest, TransactionResponse
 } from "@ethersproject/abstract-provider";
+import { encode as base64Encode } from "@ethersproject/base64";
 import { Base58 } from "@ethersproject/basex";
 import { BigNumber, BigNumberish } from "@ethersproject/bignumber";
 import { arrayify, BytesLike, concat, hexConcat, hexDataLength, hexDataSlice, hexlify, hexValue, hexZeroPad, isHexString } from "@ethersproject/bytes";
@@ -657,6 +658,16 @@ export class Resolver implements EnsResolver {
             }
         }
 
+        const skynet = hexBytes.match(/^0x90b2c605([0-9a-f]*)$/);
+        if (skynet) {
+            if (skynet[1].length === (34 * 2)) {
+                // URL Safe base64; https://datatracker.ietf.org/doc/html/rfc4648#section-5
+                const urlSafe: Record<string, string> = { "=": "", "+": "-", "/": "_" };
+                const hash = base64Encode("0x" + skynet[1]).replace(/[=+\/]/g, (a) => (urlSafe[a]));
+                return "sia:/\/" + hash;
+            }
+        }
+
         return logger.throwError(`invalid or unsupported content hash data`, Logger.errors.UNSUPPORTED_OPERATION, {
             operation: "getContentHash()",
             data: hexBytes

packages/tests/src.ts/test-providers.ts

@@ -1405,6 +1405,22 @@ describe("Resolve ENS avatar", function() {
     });
 });
 
+describe("Resolve ENS content hash", function() {
+    [
+        { title: "skynet", name: "skynet-ens.eth", value: "sia:/\/AQCRuTdTPzCyyU6I82eV7VDFVLPW82LJS9mH-chmjDlKUQ" },
+        { title: "ipns", name: "stderr.eth", value: "ipns://12D3KooWB8Z5zTNUJM1U98SjAwuCSaEwx65cHkFcMu1SJSvGmMJT" },
+        { title: "ipfs", name: "ricmoo.eth", value: "ipfs://QmdTPkMMBWQvL8t7yXogo7jq5pAcWg8J7RkLrDsWZHT82y" },
+    ].forEach((test) => {
+        it(`Resolves avatar for ${ test.title }`, async function() {
+            this.timeout(60000);
+            const provider = ethers.getDefaultProvider("homestead", getApiKeys("homestead"));
+            const resolver = await provider.getResolver(test.name);
+            const contentHash = await resolver.getContentHash();
+            assert.equal(contentHash, test.value, "content hash");
+        });
+    });
+});
+
 describe("Test EIP-2544 ENS wildcards", function() {
     const provider = <ethers.providers.BaseProvider>(providerFunctions[0].create("ropsten"));