feat(svm): cctp sponsored src

[Reinis-FRP]

Fixes: ACX-4550

[socket-security]

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[linear]

ACX-4550 `SrcChainCCTPPeripherySVM`

[md0x]

Nit: UsedNonceAccountParams struct has only one field we could use that field instead to simplify the reclaim_used_nonce_account instruction.

[Reinis-FRP]

kept this more for the sake of consistency with other instruction params that are structs. there should not be any onchain overhead for this as this serializes to the same bytes on the wire as plain nonce.

[grasphoper]

The code looks good to me. There were two last-second changes to our EVM-side code that we have to reflect here too:

• when taking a hash of a quote structure for checking a signature, we're splitting it up into two parts to avoid a stack-too-deep error:

  contracts/contracts/libraries/SponsoredCCTPQuoteLib.sol

  Line 130 in c402e1f

  bytes32 hash1 = keccak256(

  . My intuition is that this is not very annoying to fix, but @Reinis-FRP please let us know. CC @fusmanii
• two extra fields were added to the Quote struct: executionMode and actionData:

  contracts/contracts/interfaces/SponsoredCCTPInterface.sol

  Line 94 in c402e1f

  uint8 executionMode;

  . executionMode is probably easy to add. Were there problems, though, to adding a bytes array like actionData? As a last resort, we could hardcode actionData to be empty from src Solana, which seems guaranteed to be doable