feat(wasm-solana): add AuthorizeChecked instruction decoding

- Add StakeInstruction::AuthorizeChecked variant handling
- Add custodianAddress field to StakingAuthorizeParams
- Include custodian in Authorize instruction as well

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: lcovar

packages/wasm-solana/src/instructions/decode.rs

@@ -158,11 +158,40 @@ fn decode_stake_instruction(ctx: InstructionContext) -> ParsedInstruction {
                     solana_stake_interface::state::StakeAuthorize::Staker => "Staker",
                     solana_stake_interface::state::StakeAuthorize::Withdrawer => "Withdrawer",
                 };
+                let custodian = if ctx.accounts.len() >= 4 {
+                    Some(ctx.accounts[3].clone())
+                } else {
+                    None
+                };
                 ParsedInstruction::StakingAuthorize(StakingAuthorizeParams {
                     staking_address: ctx.accounts[0].clone(),
                     old_authorize_address: ctx.accounts[2].clone(),
                     new_authorize_address: new_authority.to_string(),
                     authorize_type: auth_type.to_string(),
+                    custodian_address: custodian,
+                })
+            } else {
+                make_unknown(ctx)
+            }
+        }
+        StakeInstruction::AuthorizeChecked(stake_authorize) => {
+            // Accounts: [0] stake, [1] clock, [2] authority, [3] new_authority (signer), [4] optional custodian
+            if ctx.accounts.len() >= 4 {
+                let auth_type = match stake_authorize {
+                    solana_stake_interface::state::StakeAuthorize::Staker => "Staker",
+                    solana_stake_interface::state::StakeAuthorize::Withdrawer => "Withdrawer",
+                };
+                let custodian = if ctx.accounts.len() >= 5 {
+                    Some(ctx.accounts[4].clone())
+                } else {
+                    None
+                };
+                ParsedInstruction::StakingAuthorize(StakingAuthorizeParams {
+                    staking_address: ctx.accounts[0].clone(),
+                    old_authorize_address: ctx.accounts[2].clone(),
+                    new_authorize_address: ctx.accounts[3].clone(),
+                    authorize_type: auth_type.to_string(),
+                    custodian_address: custodian,
                 })
             } else {
                 make_unknown(ctx)

packages/wasm-solana/src/instructions/types.rs

@@ -164,6 +164,8 @@ pub struct StakingAuthorizeParams {
     pub new_authorize_address: String,
     #[serde(rename = "authorizeType")]
     pub authorize_type: String, // "Staker" or "Withdrawer"
+    #[serde(rename = "custodianAddress", skip_serializing_if = "Option::is_none")]
+    pub custodian_address: Option<String>,
 }
 
 /// Intermediate type for StakeInstruction::Initialize