Try   HackMD

Signature On-chain Minter Automation

tags: Dapp 區塊鏈

Connect to the local blockchain by ganache-cli

會使用一組Private key 作為連線metamask

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Image Not Showing Possible Reasons
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Image Not Showing Possible Reasons
  • The image file may be corrupted
  • The server hosting the image is unavailable
  • The image path is incorrect
  • The image format is not supported
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Image Not Showing Possible Reasons
  • The image file may be corrupted
  • The server hosting the image is unavailable
  • The image path is incorrect
  • The image format is not supported
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Image Not Showing Possible Reasons
  • The image file may be corrupted
  • The server hosting the image is unavailable
  • The image path is incorrect
  • The image format is not supported
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Image Not Showing Possible Reasons
  • The image file may be corrupted
  • The server hosting the image is unavailable
  • The image path is incorrect
  • The image format is not supported
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Image Not Showing Possible Reasons
  • The image file may be corrupted
  • The server hosting the image is unavailable
  • The image path is incorrect
  • The image format is not supported
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Image Not Showing Possible Reasons
  • The image file may be corrupted
  • The server hosting the image is unavailable
  • The image path is incorrect
  • The image format is not supported
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Smart contract migrated to the local blockchain->transactions deployed

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SmartContract.json->擁有ABI

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前端react介面 串接好metamask + 可以一鍵 automation deploy 智能合約

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  • conncect to metamask fail

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重新 migrate smart contract(truffle migrate reset)

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寫 智能合約jest測試(truffle test)

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利用NPM內建react-signature-canvas在前端簽完名後--->轉成png檔 (可在React前端介面完成)

  • connect to metamask with minter successful

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利用ipfs http client將簽名檔可以上傳到IPFS

  • signature 存成 BUFFER(base64)->之後要將簽名檔寫在IPFS需求的格式

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  • The image file may be corrupted
  • The server hosting the image is unavailable
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Image Not Showing Possible Reasons
  • The image file may be corrupted
  • The server hosting the image is unavailable
  • The image path is incorrect
  • The image format is not supported
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Image Not Showing Possible Reasons
  • The image file may be corrupted
  • The server hosting the image is unavailable
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  • The image format is not supported
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IPFS http client常見問題

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  • The image file may be corrupted
  • The server hosting the image is unavailable
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在infura上串接 IPFS API


解決@openzeppelin無法compile智能合約問題


目前前端有bug上傳不到ipfs上

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  • 記得要connected sites

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  • 選擇想要連線的connected sites跟network的account(預設localhost大部份都是port8545)

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  • 連線成功囉

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  • 同意後transaction就成立囉,付gas fee囉

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  • 成功!mint完的signature nft都列出囉!

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補充資料

What the hack is Memory and Storage in Solidity?
什麼時候用 storage,什麼時候該用 memory?