fluence-js/packages/core/js-client/aqua/services.aqua

-- import SignResult, Sig from "@fluencelabs/aqua-lib/builtin.aqua"
-- export SignResult, Sig

-- TODO:: fix this issue: https://github.com/fluencelabs/aqua-lib/issues/12
-- and remove copy-paste

data SignResult:
    -- Was call successful or not
    success: bool
    -- Error message. Will be null if the call is successful
    error: ?string
    -- Signature as byte array. Will be null if the call is not successful
    signature: ?[]u8

-- Available only on FluenceJS peers
-- The service can also be resolved by it's host peer id
service Sig("sig"):
    -- Signs data with the service's private key. 
    -- Depending on implementation the service might check call params to restrict usage for security reasons.
    -- By default it is only allowed to be used on the same peer the particle was initiated
    -- and accepts data only from the following sources:
    --   trust-graph.get_trust_bytes
    --   trust-graph.get_revocation_bytes
    --   registry.get_route_bytes
    --   registry.get_record_bytes
    --   registry.get_host_record_bytes
    -- Argument: data - byte array to sign
    -- Returns: signature as SignResult structure
    sign(data: []u8) -> SignResult

    -- Given the data and signature both as byte arrays, returns true if the signature is correct, false otherwise.
    verify(signature: []u8, data: []u8) -> bool

    -- Gets service's public key.
    get_peer_id() -> string