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Install, reinstall or upgrade code of a canister controlled by the NNS.

# Proposal to install the ckSOL ledger canister

Repository: `https://github.com/dfinity/ic.git`

Git hash: `cf41372e3d4dc1accfe2c09a7969f8bddc729dc1`

New compressed Wasm hash: `354dd6ecfdc72b5409805b31dea22c9db11df6e14095a5a68924eb63535e6d8a`

Install args hash: `2e049fd0690e9c2aa324b97c8792b9dd64df768c6ca1eefd52cb04fe3f05b7bf`

Target canister: `ls5lp-lqaaa-aaaar-qb5oa-cai`

---

## Motivation
This proposal installs the mainnet ckSOL ledger to the governance-controlled canister ID [`ls5lp-lqaaa-aaaar-qb5oa-cai`](https://dashboard.internetcomputer.org/canister/ls5lp-lqaaa-aaaar-qb5oa-cai) on subnet [`pzp6e-ekpqk-3c5x7-2h6so-njoeq-mt45d-h3h6c-q3mxf-vpeq5-fk5o7-yae`](https://dashboard.internetcomputer.org/subnet/pzp6e-ekpqk-3c5x7-2h6so-njoeq-mt45d-h3h6c-q3mxf-vpeq5-fk5o7-yae).
The installed Wasm is the ledger of the latest ICRC ledger suite release [ledger-suite-icrc-2026-03-09](https://github.com/dfinity/ic/releases/tag/ledger-suite-icrc-2026-03-09).

ckSOL is a chain-key token on the Internet Computer backed 1:1 by SOL, the native token of the Solana blockchain.
The ckSOL ledger is an ICRC-1, ICRC-2 and ICRC-3 compliant ledger that holds the ckSOL balances.
The [ckSOL minter](https://dashboard.internetcomputer.org/canister/lh22c-kyaaa-aaaar-qb5nq-cai) mints ckSOL on this ledger when SOL is deposited and burns ckSOL when SOL is withdrawn.
See the [design document](https://github.com/dfinity/cksol/blob/bfeae694767f24decc7e45a0e3335f9f76163438/docs/design.md) for details.


## Install args

```
git fetch
git checkout cf41372e3d4dc1accfe2c09a7969f8bddc729dc1
didc encode -d rs/ledger_suite/icrc1/ledger/ledger.did -t '(LedgerArg)' '(variant { Init = record {
    minting_account = record { owner = principal "lh22c-kyaaa-aaaar-qb5nq-cai"; subaccount = null };
    fee_collector_account = opt record {
      owner = principal "lh22c-kyaaa-aaaar-qb5nq-cai";
      subaccount = opt blob "\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\0f\ee";
    };
    transfer_fee = 500 : nat;
    decimals = opt (9 : nat8);
    max_memo_length = opt (80 : nat16);
    token_symbol = "ckSOL";
    token_name = "ckSOL";
    metadata = vec {
      record { "icrc1:logo"; variant { Text = "data:image/svg+xml;base64,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" } };
    };
    initial_balances = vec {};
    feature_flags = opt record { icrc2 = true };
    archive_options = record {
      num_blocks_to_archive = 1_000 : nat64;
      trigger_threshold = 4_200_000_000 : nat64;
      node_max_memory_size_bytes = opt (3_221_225_472 : nat64);
      max_message_size_bytes = null;
      max_transactions_per_response = null;
      cycles_for_archive_creation = opt (100_000_000_000_000 : nat64);
      controller_id = principal "r7inp-6aaaa-aaaaa-aaabq-cai";
      more_controller_ids = null;
    };
    index_principal = opt principal "2ezyf-hqaaa-aaaar-qb6ga-cai";
  } })' | xxd -r -p | sha256sum
```

* [`lh22c-kyaaa-aaaar-qb5nq-cai`](https://dashboard.internetcomputer.org/canister/lh22c-kyaaa-aaaar-qb5nq-cai) is the ckSOL minter canister. Its default account is the minting account.
* The fee collector is the `0000000000000000000000000000000000000000000000000000000000000fee` subaccount of the minter canister.
* The transfer fee is 500 lamports (0.0000005 SOL, about 0.00006 USD with 1 SOL at about 110 USD as of October 9, 2026), which is one order of magnitude cheaper than a SOL transfer on Solana (5,000 lamports), see [Section 3.3.1 of the design](https://github.com/dfinity/cksol/blob/bfeae694767f24decc7e45a0e3335f9f76163438/docs/design.md#331-cksol-ledger-fees).
* The token has 9 decimals, like SOL, so that 1 ckSOL unit corresponds to 1 lamport.
* The maximum memo length is 80 bytes.
* The logo is the base64 encoding of [`cksol-token.svg`](https://github.com/dfinity/cksol/blob/bfeae694767f24decc7e45a0e3335f9f76163438/static/images/cksol-token.svg) and can be checked from the root of the [cksol repository](https://github.com/dfinity/cksol) with `base64 -i static/images/cksol-token.svg | tr -d '\n'`.
* ICRC-2 is enabled because the minter burns ckSOL with `icrc2_transfer_from` when processing withdrawals.
* Archiving is effectively disabled by setting `trigger_threshold` to 4,200,000,000 blocks. The other archive options match those of the ckETH ledger (proposal [126170](https://dashboard.internetcomputer.org/proposal/126170)), so that archives are controlled by the [NNS root canister](https://dashboard.internetcomputer.org/canister/r7inp-6aaaa-aaaaa-aaabq-cai) if archiving is enabled by a later upgrade.
* [`2ezyf-hqaaa-aaaar-qb6ga-cai`](https://dashboard.internetcomputer.org/canister/2ezyf-hqaaa-aaaar-qb6ga-cai) is the governance-controlled canister ID that will become the ckSOL index.

## Wasm Verification

Verify that the hash of the gzipped WASM matches the proposed hash.

```
git fetch
git checkout cf41372e3d4dc1accfe2c09a7969f8bddc729dc1
"./ci/container/build-ic.sh" "--canisters"
sha256sum ./artifacts/canisters/ic-icrc1-ledger.wasm.gz
```

Upgrade NNS Canister: ls5lp-lqaaa-aaaar-qb5oa-cai to wasm with hash: 354dd6ecfdc72b5409805b31dea22c9db11df6e14095a5a68924eb63535e6d8a