extend docs

README.md

@@ -187,6 +187,22 @@ forge script script/deploy_OrderTypes.s.sol:DeployOrderTypes --rpc-url $ETH_RPC_
 The `broadcast` directory collects the latest run of the deployment script by network and is updated manually.
 When the script is ran, the corresponding files can be found in the folder `broadcast/deploy_OrderTypes.s.sol/`.
 
+#### Manual deployment
+
+Because of the issue [#39](https://github.com/cowprotocol/composable-cow/issues/93), in order to achieve deterministic deployment it is needed to:
+
+- Go to a deployed contract in another network, open the creation TX (e.g. [ExtensibleFallbackHandler](https://etherscan.io/tx/0x33dcbc73a8797c69a5b3956539dd8d191cf3f190bcb27a4d4eca8556f030f574) in mainnet)
+- Go to `Click to show more` and copy the `Input Data` in Original format, also copy the `to` address
+- Use your favourite tool to make a transaction (e.i. [swiss-knife](https://transact.swiss-knife.xyz/send-tx?chainId=1))
+- Use the corresponding `Input Data` and `to` and send the tx
+- A new contract will be deployed using `CREATE2` to the same deterministic address
+
+How to verify the contracts:
+
+- Some contracts will auto-verify themselves (rare), because they exist in other networks
+- Some contracts can be verified with forge e.i. `forge verify-contract --etherscan-api-key $BASESCAN_API_KEY --rpc-url $RPC_URL 0x2f55e8b20D0B9FEFA187AA7d00B6Cbe563605bF5 lib/safe/contracts/handler/ExtensibleFallbackHandler.sol:ExtensibleFallbackHandler`
+- For the contracts which can't be verified neither way, the standard json input has to be generated with forge: `forge verify-contract --verifier sourcify --show-standard-json-input --etherscan-api-key $BASESCAN_API_KEY --rpc-url $RPC_URL 0xfdaFc9d1902f4e0b84f65F49f244b32b31013b74 src/ComposableCoW.sol:ComposableCoW > ComposableCoW.json`, and submit the json to the corresponding block explorer
+
 #### Local deployment
 
 For local integration testing, including the use of [Watch Tower](https://github.com/cowprotocol/tenderly-watch-tower), it may be useful deploying to a _forked_ mainnet environment. This can be done with `anvil`.