bug: serde serialize/deserialize big arrays (#405)

Author: wjthieme

.changeset/tiny-bikes-hug.md

@@ -0,0 +1,5 @@
+---
+'@codama/renderers-rust': patch
+---
+
+bug: serde serialize/deserialize big arrays

packages/renderers-rust/e2e/dummy/Cargo.lock

@@ -6,7 +6,7 @@ edition = "2021"
 [features]
 anchor = ["dep:anchor-lang"]
 anchor-idl-build = ["anchor", "anchor-lang?/idl-build"]
-serde = ["dep:serde", "dep:serde_with"]
+serde = ["dep:serde", "dep:serde_with", "dep:serde-big-array"]
 test-sbf = []
 
 [dependencies]
@@ -17,6 +17,7 @@ num-derive = "^0.3"
 num-traits = "^0.2"
 serde = { version = "^1.0", features = ["derive"], optional = true }
 serde_with = { version = "^3.0", optional = true }
+serde-big-array = { version = "^0.5", optional = true }
 solana-program = "~1.18"
 thiserror = "^1.0"
 

packages/renderers-rust/e2e/dummy/Cargo.toml

@@ -6,7 +6,7 @@ edition = "2021"
 [features]
 anchor = ["dep:anchor-lang"]
 anchor-idl-build = ["anchor", "anchor-lang?/idl-build"]
-serde = ["dep:serde", "dep:serde_with"]
+serde = ["dep:serde", "dep:serde_with", "dep:serde-big-array"]
 test-sbf = []
 
 [dependencies]
@@ -17,6 +17,7 @@ num-derive = "^0.3"
 num-traits = "^0.2"
 serde = { version = "^1.0", features = ["derive"], optional = true }
 serde_with = { version = "^3.0", optional = true }
+serde-big-array = { version = "^0.5", optional = true }
 solana-program = "~1.18"
 thiserror = "^1.0"
 

packages/renderers-rust/e2e/memo/Cargo.lock

@@ -6,7 +6,7 @@ edition = "2021"
 [features]
 anchor = ["dep:anchor-lang"]
 anchor-idl-build = ["anchor", "anchor-lang?/idl-build"]
-serde = ["dep:serde", "dep:serde_with"]
+serde = ["dep:serde", "dep:serde_with", "dep:serde-big-array"]
 test-sbf = []
 
 [dependencies]
@@ -16,6 +16,7 @@ num-derive = "^0.3"
 num-traits = "^0.2"
 serde = { version = "^1.0", features = ["derive"], optional = true }
 serde_with = { version = "^3.0", optional = true }
+serde-big-array = { version = "^0.5", optional = true }
 solana-program = "~1.18"
 thiserror = "^1.0"
 

packages/renderers-rust/e2e/memo/Cargo.toml

@@ -391,12 +391,15 @@ export function getTypeManifestVisitor(options: {
                         derive =
                             '#[cfg_attr(feature = "serde", serde(with = "serde_with::As::<Vec<serde_with::DisplayFromStr>>"))]\n';
                     } else if (
-                        (isNode(resolvedNestedType, 'arrayTypeNode') &&
-                            isNode(resolvedNestedType.count, 'fixedCountNode') &&
-                            resolvedNestedType.count.value > 32) ||
-                        (isNode(resolvedNestedType, ['bytesTypeNode', 'stringTypeNode']) &&
-                            isNode(structFieldType.type, 'fixedSizeTypeNode') &&
-                            structFieldType.type.size > 32)
+                        isNode(resolvedNestedType, 'arrayTypeNode') &&
+                        isNode(resolvedNestedType.count, 'fixedCountNode') &&
+                        resolvedNestedType.count.value > 32
+                    ) {
+                        derive = '#[cfg_attr(feature = "serde", serde(with = "serde_big_array::BigArray"))]\n';
+                    } else if (
+                        isNode(resolvedNestedType, ['bytesTypeNode', 'stringTypeNode']) &&
+                        isNode(structFieldType.type, 'fixedSizeTypeNode') &&
+                        structFieldType.type.size > 32
                     ) {
                         derive =
                             '#[cfg_attr(feature = "serde", serde(with = "serde_with::As::<serde_with::Bytes>"))]\n';