I'm trying to initialise a contract that has an address option in its initial storage, but when I provide a valid address, it keeps being interpreted as a string; and compilation fails.

I have here a minimal contract showing the address option behaviour:

(** A host keeps the payment window open *)
type contract_storage = 
    host: address option;

(* Fails if sender is not host *)
let fail_if_not_host (storage : contract_storage) : unit =
  match storage.host with
  | None -> unit
  | Some host ->
    if Tezos.sender <> host
    then failwith "You are not the host of the contract"
    else unit

let fail_if_unhosted (storage: contract_storage) : unit =
  match storage.host with
  | None -> (failwith "The contract is no longer hosted" : unit)
  | Some _host -> unit

type entrypoint =
    | Remove_host of unit
    | Default of unit

let main (param, storage : entrypoint * contract_storage) : operation list * contract_storage =
    match param with
    | Remove_host _b ->
        let _ = fail_if_not_host storage in
        let new_storage = { storage with host = (None : address option); } in
        ([]: operation list), new_storage
    | Default _d ->
        let _ = fail_if_unhosted storage in
        ([]: operation list), storage

Initial storage:

    host = (Some "tz1VSUr8wwNhLAzempoch5d6hLRiTh8Cjcjb": address option);

This is a valid address: https://tzkt.io/tz1VSUr8wwNhLAzempoch5d6hLRiTh8Cjcjb/operations/

When I try to compile it though:

echo -e "Initial ligo storage:\n${initial_ligo_storage}"
echo "Compiling…"
ligo compile storage $ligo_file "$initial_ligo_storage" --entry-point main --protocol $tezos_protocol --werror --output-file hostable_seed.tz
Initial ligo storage:
    host = (Some "tz1VSUr8wwNhLAzempoch5d6hLRiTh8Cjcjb": address option);

Invalid type(s).
Expected: "option (address)", but got: "option (string)". 

1 Answer 1


The address itself should be annotated as address, like this:

    host = Some ("tz1VSUr8wwNhLAzempoch5d6hLRiTh8Cjcjb" : address);

See successful deployment: https://ide.ligolang.org/p/lxt1CWE4AutZLUSL6z1Kow

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