Questions tagged [michelson]

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Passing parameters in truffle tests

I have this parameter for a function: type modify_list is | Add of list(address) | Remove of list(address) type modify_list_michelson is michelson_or_right_comb(modify_list) When I try to supply ...
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1answer
10 views

What's the best way to convert from TMutez to TBytes?

Previously when I asked about converting types, I got this useful suggestion: For mutez, you could start to convert to int (by dividing by 1 mutez) and then use the same techniques. I'm wondering if ...
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2answers
55 views

How to Integrating SmartPy compiler within the browser?

I have been trying to integrate the SmartPy compiler toolchain within Cryptoverse wars Learning interface and have been going through this video (OCaml Under The Hood: SmartPy) and have encountered ...
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20 views

signing and broadcasting operations sdks and other methods?

I'm trying to broadcast an operation using the following method in pytezos as a backend for a dapp: forge -> receive signature (from thanos) -> reconstruct operation group -> inject this ...
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2answers
35 views

How can I write On Chain Contract Calls in Tezos Sandbox?

I am trying to write a test case in Tezos Sandbox that uses an On Chain Contract Call. To start with, I am trying to implement the example from SmartPy "On Chain Contract Calls - Collatz" ...
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1answer
24 views

How are pairs serialized in Tezos?

Running the PACK operation on a tuple (represented as a pair in Michelson, I get $ ligo interpret -s pascaligo 'Bytes.pack((1, 2))' 0x05070700010002 The numbers 1 and 2 are serialized as 0001 and ...
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1answer
34 views

Handling floating point numbers in decentralized exchanges

I am writing a contract in Ligo that manages FA2 fungible tokens with an interface that lets users easily create new tokens. I am building a very simple exchange where the users can create orders to ...
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1answer
40 views

How to call PACK in JavaScript

In my smart contract in LIGO I serialize some data using Bytes.pack which calls the underlying PACK Michelson instruction. In my case, the function signature is (nat, address, nat) -> bytes. Does ...
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1answer
45 views

Batching Transactions FA2

On the Tzip for FA2, I read that Every transfer operation MUST happen atomically and in order. If at least one transfer in the batch cannot be completed, the whole transaction MUST fail, all token ...
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1answer
23 views

Maximum value for Nat in michelson

Hello what is the maximum value for natrual number in michelson or what a bigmap can handle. I am trying to write a FA1.2 contract and is concerned if there will be a maximum amount an account can ...
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1answer
34 views

What are the changes in Michelson in Dalphanet?

Dalphanet introduces quite a few new primitives and types. What are these primitives and types? What are their typing rules?
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1answer
18 views

How does sp.record arrange data into pairs?

For example if I have the following code: sp.record(one = one, two = two, three = three, four = four, five = five) Would the format of the result be pair(one pair(two pair(three pair(four five)))) or ...
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1answer
111 views

Gas costs types in Michelson

Gas cost is an important topic in tezos and I would like to understand better the different types of it that occur in michelson how they are calculated Could someone offer me a pointer ?
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1answer
26 views

Overflow/ Underflow in Smart Contract

Is Tezos vulnerable to overflow/ underflow attacks on the smart contracts? If yes, how do you recommend to test whether a particular smart contract suffers from it.
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1answer
24 views

Michelson: Parameter vs Storage

I'm struggling to process what the difference between parameter and storage is in Michelson. From what I've been reading, it just looks like two different types of inputs to a contract. So how should ...
2
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1answer
22 views

Timestamps overflow/underflow errors

In the list of possible errors in RPC: http://tezos.gitlab.io/api/errors.html#michelson-parsing-macros, there are timestamp_add and timestamp_sub errors, that could happen in arithmetic instructions ...
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1answer
73 views

How do I call the FA2 balance_of endpoint through Truffle?

I have written a contract to implement FA2 and I have a Truffle/JavaScript setup to test this contract while running against a sandboxed node. I can test the transfer endpoint and the update_operators ...
2
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1answer
26 views

Call method taking unit type as parameter from JavaScript

I have a Truffle instance of the contract and I call the method like this contract_instance.method(); This gives me this error message: method Received 0 arguments while expecting on of the follow ...
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4answers
73 views

Is there a formula to build parameter messages to be passed to smart contract entrypoints?

When calling a smart contract entrypoint, it is required to pass the needed entrypoint parameters. This is done through a message that must be sent in JSON/Pairs format. My doubt is: Is there a ...
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1answer
18 views

Contract calling convention for sum type

burn function in KT_token contract can be called with arg format: burn: (pair (or (unit %uSD) (unit %xTZ)) mutez) so I tried, ./tezos-client transfer 0 from alice to KT_token --entrypoint burn --...
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1answer
45 views

Why does michelson have no heap?

I have read a recent article about juvix optimizations to adjust for michelson specifics https://research.metastate.dev/juvix-compiling-juvix-to-michelson/ And saw that michelson has 2 features ...
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1answer
37 views

how to encode contract invoke parameter to json code? ConseilJS not support parameter of tyep List Signature

ConseilJS seems not support parameter type List Signature, see at https://github.com/Cryptonomic/ConseilJS/issues/261. So I want to encode my parameter to JSON code that I can change parameterType ...
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2answers
195 views

What are the differences between key, key_hash, address, contract and signature in Michelson?

There is a related question, but the differences are still not clear. These five types are mentioned in the Michelson whitedoc with the following definitions: address: An untyped address (implicit ...
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2answers
81 views

Pretty-printing Micheline JSON

How can I pretty-print a Michelson contract in JSON to concrete syntax?
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1answer
48 views

Ill formed storage type in origination

Attempted to originate a contract but getting a storage type error when trying to originate it Error: proto.005-PsBabyM1.michelson_v1.ill_formed_type Error: proto.005-PsBabyM1.michelson_v1....
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0answers
16 views

Breadth-first inter-transaction semantics

In the « inter-transaction semantics » section of the Michelson specification it appears that when a contract emits internal operations (which in turn can emit their own) the overall evaluation ...
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1answer
150 views

Michelson pairs not comparable

When I try to type the following Michelson script, I get a type error. parameter unit; storage (big_map (pair string address) (list timestamp)); code {CDR; NIL operation; PAIR}; Ill formed type. At ...
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1answer
22 views

How to check in Michelson if a key_hash is delegatable

A Set_delegate operation will fail if the specified key_hash is not delegatable. Is it possible in Michelson to verify if a kh : key_hash is not delegatable and thus if the operation emitted by ...
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1answer
102 views

Relative gas cost of map vs bigmap

Does there exist a realistic performance benchmark between map/bigmap? I am looking for a tipping point where it would make more sense to use a big map for gas cost optimization
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1answer
56 views

How to interact with SmartPy BigMap in contract?

I would like to setup a smart contract that contains (as defined by smartpy) a BigMap storage. I have the following code: import smartpy as sp class contract(sp.Contract): def __init__(self): ...
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1answer
35 views

ConseilJS TezosContractIntrospector.generateEntryPointsFromAddress `Uncaught (in promise) TypeError: Cannot read property '0' of undefined`

Trying to retrieve contract entry points using the TezosContractIntrospector The following code: async function entry_points(){ const server={ url:'https://conseil-dev.cryptonomic-infra.tech:...
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4answers
187 views

Ethereum/Solidity dev here, looking to migrate some Solidity contracts onto Tezos. Was hoping to have some light shed on a few questions

Was hoping to have some light shed on a few questions. Narrowing in on using Ligo, Archetype, or Liquidity. Is Liquidity kind of a dead-end right now? I noticed it's not listed on developeres.tezos....
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3answers
59 views

Originate contract with init

I have a contract of type: pair (pair (list nat) (pair mutez (map address (list nat)))) (pair address (pair address bool)) What is an example of a valid initial storage that can be passed to ...
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1answer
43 views

What is the behavior of SET_DELEGATE in particular cases

The Michelson Documentation does not say much about this function: SET_DELEGATE: Forge a delegation. :: option key_hash : 'S -> operation : 'S This left me wondering about its behavior and if ...
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1answer
162 views

How to deploy a smart contract influenced by UI inputs using ConseilJS and SmartPy generated Michelson?

I wish to be able to create a smart contract taking input from a UI to supply parameters pubKey,prvKey,pubHash for the deployment and minAmount and maxTime to influence the Michelson. I have the ...
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1answer
38 views

What is the execution sequence of this Michelson code snippet

I tried to get a better grip on michelson but found myself fail at a simple piece of michelson code. Is anyone willing to help on the logic of below code? Thanks a lot! parameter (pair nat nat); ...
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1answer
53 views

What is the size limit of a list in Michelson

Can lists be used to store large amounts of data like big maps ? The doc (https://tezos.gitlab.io/whitedoc/michelson.html?highlight=michelson%20types#core-data-types-and-notations) doesn't talk about ...
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0answers
15 views

Split function contract template

Is there a code template for a simple contract which splits the incoming funds and sends them proportionally to a list of pre-registered addresses? Example: Contract has the following functions: ...
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2answers
43 views

How to use Emacs michelson-mode with Tezos sandboxed client?

The Emacs michelson-mode relies on being able to call Tezos client. How can you use the Tezos sandboxed client for it?
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0answers
52 views

Error too big to serialize within the provided gas bounds. Increasing the gas bounds does not help

I am developing a fairly large set of contracts that interact with each other. I wanted to reorganize and optimized the code and I've added lots of PUSH string "..."; FAILWITH to help me debug. I am ...
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1answer
54 views

Why cant i call the contract entry point with type parameter througth eztz.contract.send

im trying to call the entry point create_proposition ... (pair :proposition %_Liq_entry_create_proposition (key_hash %destination) (mutez %amount)) using the function eztz.contract....
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1answer
40 views

Getting errors related to the smart contract after running eztz.contract.send()

im tryng to send a operation to a previously deployed contract and im geting these errors, error: "Operation Failed" ​ errors: (3) […] ​​ 0: {…} ​​​ contract: "...
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1answer
72 views

how can i send operation throught eztz to a contract specific entry point?

im tryng to send the operation to a deployed contract, this is my function ... eztz.contract .send( "KT18qHvhEZUwiawA8QEURwuK8RGJj184725L", keysext.pkh, keysext.sk, 5, "RIGHT LEFT UNIT", "...
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1answer
83 views

Error while initializing storage in contract deployment

I am using folowing command: ./tezos-client originate contract TestContract for tz1address transferring 1 from tz1address running contes.fi --init 'pair (map "KT1address" 1) (map "KT1address" "2019-...
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0answers
54 views

How to implement a signature checker for the signature scheme BLS?

We are willing to implement a signature checker for the signature scheme BLS (or BLS12-381). To the best of our knowledge, it may not be too painful since the smart contract language already supports ...
3
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1answer
74 views

Contract - purpose of returned internal operations?

I keep seeing contract internal operations being returned empty (stack - 'NIL operation;') in the example Tezos Michelson contracts. What is the purpose of the internal operations? Also, are there ...
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1answer
98 views

Error while initializing storage in contract deployment cmd using tezos-client command line interface option

I am using the following command originate contract new for mgr transferring qty from src running prg for deploying a contract using Command Line Interface as mentioned in CLI document. This ...
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1answer
32 views

Michelson contract files - spaces, new lines and comments

I wanted to check that when a Michelson contract file is created. Do file spaces, new lines and comments increase the gas cost when deployed?
3
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1answer
67 views

Michelson P2P message encoding

I'm looking to implement full message "forging" with no reliance on RPC calls. The P2P message doc does not cover all the details. Let's say I have the JSON representation of parameters and code, how ...
3
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2answers
126 views

Contract accepting an ANY type

A contract that is upgradable would benefit from being able to accept ANY type, and forward that type to the current app contract based on how that ANY type parses. For example, a request might be ...