TypeError: Cannot read properties of null (reading 'sendTransaction')

[zendevil]

I have the following:

factory = new ethers.ContractFactory(abi, bytecode);
contract = await factory.deploy(tokenURI);

My contract constructor is:

    constructor(string memory tokenURI
               ) ERC1155 (tokenURI) {
                  emit Created(tokenURI);
               }

But I see the following error in the browser where I'm running the ethers.js code:

{message: 'Promise error', data: {…}, cause: TypeError: Cannot read properties of null (reading 'sendTransaction')
    at ContractFactory.eval (…, name: 'Error', description: undefined, …}cause: TypeError: Cannot read properties of null (reading 'sendTransaction')
    at ContractFactory.eval (http://localhost:3000/js/cljs-runtime/module$node_modules$$ethersproject$contracts$lib$index.js:58:375)
    at step (http://localhost:3000/js/cljs-runtime/module$node_modules$$ethersproject$contracts$lib$index.js:21:75)
    at Object.eval [as next] (http://localhost:3000/js/cljs-runtime/module$node_modules$$ethersproject$contracts$lib$index.js:19:353)
    at fulfilled (http://localhost:3000/js/cljs-runtime/module$node_modules$$ethersproject$contracts$lib$index.js:18:519)message: "Cannot read properties of null (reading 'sendTransaction')"stack: "TypeError: Cannot read properties of null (reading 'sendTransaction')\n    at ContractFactory.eval (http://localhost:3000/js/cljs-runtime/module$node_modules$$ethersproject$contracts$lib$index.js:58:375)\n    at step (http://localhost:3000/js/cljs-runtime/module$node_modules$$ethersproject$contracts$lib$index.js:21:75)\n    at Object.eval [as next] (http://localhost:3000/js/cljs-runtime/module$node_modules$$ethersproject$contracts$lib$index.js:19:353)\n    at fulfilled (http://localhost:3000/js/cljs-runtime/module$node_modules$$ethersproject$contracts$lib$index.js:18:519)"[[Prototype]]: Errorcause: undefinedconstructor: ƒ TypeError()message: ""name: "TypeError"[[Prototype]]: ObjectcolumnNumber: undefineddata: {meta: null, cnt: 1, arr: Array(2), __hash: null, cljs$lang$protocol_mask$partition0$: 16647951, …}description: undefinedfileName: undefinedlineNumber: undefinedmessage: "Promise error"name: "Error"number: undefinedstack: "Error: Promise error\n    at new cljs$core$ExceptionInfo (http://localhost:3000/js/cljs-runtime/cljs.core.js:36979:10)\n    at Function.eval [as cljs$core$IFn$_invoke$arity$3] (http://localhost:3000/js/cljs-runtime/cljs.core.js:37040:9)\n    at eval (http://localhost:3000/js/cljs-runtime/cljs.core.async.interop.js:16:84)"[[Prototype]]: Error
cljs$core$async$impl$ioc_helpers$run_state_machine_wrapped @ ioc_helpers.cljs:50
eval @ ioc_helpers.cljs:56
eval @ channels.cljs:61
cljs$core$async$impl$dispatch$process_messages @ dispatch.cljs:27
channel.port1.onmessage @ nexttick.js:214

I'm running ganache and I want the contract to be deployed on ganache.

How to fix this?

[zemse]

You have to pass a signer as the third argument to ContractFactory.

factory = new ethers.ContractFactory(abi, bytecode, signer);

To get signer from ganache: docs