Recognize program address from Anchor IDL with seed of kind "account"

.changeset/tasty-weeks-protect.md

@@ -0,0 +1,5 @@
+---
+"@codama/nodes-from-anchor": patch
+---
+
+Recognize program addresses from seeds of kind set to `"account"` if the address of the account it points to is statically known. (See #607)

packages/nodes-from-anchor/src/v01/InstructionAccountNode.ts

@@ -40,14 +40,15 @@ export function instructionAccountNodesFromAnchorV01(
     return idl.flatMap(account =>
         'accounts' in account
             ? instructionAccountNodesFromAnchorV01(allAccounts, instructionArguments, account.accounts)
-            : [instructionAccountNodeFromAnchorV01(allAccounts, instructionArguments, account)],
+            : [instructionAccountNodeFromAnchorV01(allAccounts, instructionArguments, account, idl)],
     );
 }
 
 export function instructionAccountNodeFromAnchorV01(
     allAccounts: AccountNode[],
     instructionArguments: InstructionArgumentNode[],
     idl: IdlV01InstructionAccount,
+    parentIdl: IdlV01InstructionAccountItem[],
 ): InstructionAccountNode {
     const isOptional = idl.optional ?? false;
     const docs = idl.docs ?? [];
@@ -133,6 +134,15 @@ export function instructionAccountNodeFromAnchorV01(
                         programId = getBase58Codec().decode(new Uint8Array(idl.pda.program.value));
                         break;
                     }
+                    case 'account': {
+                        const programPath = idl.pda.program.path;
+                        const programNode = parentIdl.find(acc => acc.name == programPath);
+                        if (!(programNode && 'address' in programNode)) {
+                            throw new CodamaError(CODAMA_ERROR__ANCHOR__PROGRAM_ID_KIND_UNIMPLEMENTED, { kind });
+                        }
+                        programId = programNode.address;
+                        break;
+                    }
                     default: {
                         throw new CodamaError(CODAMA_ERROR__ANCHOR__PROGRAM_ID_KIND_UNIMPLEMENTED, { kind });
                     }

packages/nodes-from-anchor/test/v01/InstructionAccountNode.test.ts

@@ -21,13 +21,18 @@ import { expect, test } from 'vitest';
 import { instructionAccountNodeFromAnchorV01, instructionAccountNodesFromAnchorV01 } from '../../src';
 
 test('it creates instruction account nodes', () => {
-    const node = instructionAccountNodeFromAnchorV01([], [], {
-        docs: ['my docs'],
-        name: 'MyInstructionAccount',
-        optional: true,
-        signer: false,
-        writable: true,
-    });
+    const node = instructionAccountNodeFromAnchorV01(
+        [],
+        [],
+        {
+            docs: ['my docs'],
+            name: 'MyInstructionAccount',
+            optional: true,
+            signer: false,
+            writable: true,
+        },
+        [],
+    );
 
     expect(node).toEqual(
         instructionAccountNode({