Merge pull request #6448 from mcdee/ethlink

Allow resolution of .eth names via .eth.link

namesys/namesys.go

@@ -80,6 +80,9 @@ func (ns *mpns) ResolveAsync(ctx context.Context, name string, options ...opts.R
 	return resolveAsync(ctx, ns, name, opts.ProcessOpts(options))
 }
 
+const ethTLD = ".eth"
+const linkTLD = ".link"
+
 // resolveOnce implements resolver.
 func (ns *mpns) resolveOnceAsync(ctx context.Context, name string, options opts.ResolveOpts) <-chan onceResult {
 	out := make(chan onceResult, 1)
@@ -87,6 +90,11 @@ func (ns *mpns) resolveOnceAsync(ctx context.Context, name string, options opts.
 	if !strings.HasPrefix(name, ipnsPrefix) {
 		name = ipnsPrefix + name
 	}
+	if strings.HasSuffix(name, ethTLD) {
+		// This is an ENS name.  As we're resolving via an arbitrary DNS server
+		// that may not know about .eth we need to add our link domain suffix.
+		name = name + linkTLD
+	}
 	segments := strings.SplitN(name, "/", 4)
 	if len(segments) < 3 || segments[0] != "" {
 		log.Debugf("invalid name syntax for %s", name)

namesys/namesys_test.go

@@ -51,6 +51,7 @@ func mockResolverOne() *mockResolver {
 			"QmatmE9msSfkKxoffpHwNLNKgwZG8eT9Bud6YoPab52vpy": "/ipfs/Qmcqtw8FfrVSBaRmbWwHxt3AuySBhJLcvmFYi3Lbc4xnwj",
 			"QmbCMUZw6JFeZ7Wp9jkzbye3Fzp2GGcPgC3nmeUjfVF87n": "/ipns/QmatmE9msSfkKxoffpHwNLNKgwZG8eT9Bud6YoPab52vpy",
 			"QmY3hE8xgFCjGcz6PHgnvJz5HZi1BaKRfPkn1ghZUcYMjD": "/ipns/ipfs.io",
+			"QmQ4QZh8nrsczdUEwTyfBope4THUhqxqc1fx6qYhhzZQei": "/ipfs/QmP3ouCnU8NNLsW6261pAx2pNLV2E4dQoisB1sgda12Act",
 		},
 	}
 }
@@ -58,7 +59,8 @@ func mockResolverOne() *mockResolver {
 func mockResolverTwo() *mockResolver {
 	return &mockResolver{
 		entries: map[string]string{
-			"ipfs.io": "/ipns/QmbCMUZw6JFeZ7Wp9jkzbye3Fzp2GGcPgC3nmeUjfVF87n",
+			"ipfs.io":                "/ipns/QmbCMUZw6JFeZ7Wp9jkzbye3Fzp2GGcPgC3nmeUjfVF87n",
+			"www.wealdtech.eth.link": "/ipns/QmQ4QZh8nrsczdUEwTyfBope4THUhqxqc1fx6qYhhzZQei",
 		},
 	}
 }
@@ -80,6 +82,8 @@ func TestNamesysResolution(t *testing.T) {
 	testResolution(t, r, "/ipns/QmY3hE8xgFCjGcz6PHgnvJz5HZi1BaKRfPkn1ghZUcYMjD", 1, "/ipns/ipfs.io", ErrResolveRecursion)
 	testResolution(t, r, "/ipns/QmY3hE8xgFCjGcz6PHgnvJz5HZi1BaKRfPkn1ghZUcYMjD", 2, "/ipns/QmbCMUZw6JFeZ7Wp9jkzbye3Fzp2GGcPgC3nmeUjfVF87n", ErrResolveRecursion)
 	testResolution(t, r, "/ipns/QmY3hE8xgFCjGcz6PHgnvJz5HZi1BaKRfPkn1ghZUcYMjD", 3, "/ipns/QmatmE9msSfkKxoffpHwNLNKgwZG8eT9Bud6YoPab52vpy", ErrResolveRecursion)
+	testResolution(t, r, "/ipns/www.wealdtech.eth", 1, "/ipns/QmQ4QZh8nrsczdUEwTyfBope4THUhqxqc1fx6qYhhzZQei", ErrResolveRecursion)
+	testResolution(t, r, "/ipns/www.wealdtech.eth", 2, "/ipfs/QmP3ouCnU8NNLsW6261pAx2pNLV2E4dQoisB1sgda12Act", nil)
 }
 
 func TestPublishWithCache0(t *testing.T) {