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Setup

Clone the ERC-20 contract repository and run the make build-contract command. This will create the erc20_token.wasm and the erc20_test_call.wasm. The token WASM is the main contract. We will use the test_call contract wasm to query the balances and allowances of the ERC-20 token balances throughout this workflow.

Install the Main ERC-20 Contract​

casper-client put-deploy -n http://3.143.158.19:7777 \
--chain-name integration-test \
--secret-key ~/casper/ibm_demo/user_a/secret_key.pem \
--session-path ~/casper/ibm_demo/erc20_token.wasm \
--session-arg "name:string='ERC20'" \
--session-arg "symbol:string='gris'" \
--session-arg "total_supply:u256='100'" \
--session-arg "decimals:u8='1'" \
--payment-amount 90000000000

Install the erc20_test_call Contract Package​

casper-client put-deploy -n http://3.143.158.19:7777 \
--chain-name integration-test \
--secret-key ~/casper/ibm_demo/user_a/secret_key.pem \
--session-path ~/casper/ibm_demo/erc20_test_call.wasm \
--payment-amount 90000000000

At this point, the account that installed both the main contract and the helper contract will look like this.

{
    "src": {
    "Account": {
    "_accountHash": "account-hash-303c0f8208220fe9a4de40e1ada1d35fdd6c678877908f01fddb2a56502d67fd",
    "namedKeys": [
        {
        "name": "erc20_test_call",
        "key": "hash-999326ca8408dfd37da023eb6fd82f174151be64f83f9fb837632a0d69fd4c7e"
        },
        {
        "name": "erc20_token_contract",
        "key": "hash-b568f50a64acc8bbe43462ffe243849a88111060b228dacb8f08d42e26985180"
        },
    ],
    "mainPurse": "uref-6c062525debdee18d5cad083ca530fcb65ef8741574fba4c97673f4ed00093f7-007",
    "associatedKeys": [
        {
        "accountHash": "account-hash-303c0f8208220fe9a4de40e1ada1d35fdd6c678877908f01fddb2a56502d67fd",
        "weight": 1
        }
    ],
    "actionThresholds": {
        "deployment": 1,
        "keyManagement": 1
        }
        }
    }
}

Note:

  1. erc20_token_contract is the main contract, and is a stored contract, record its hash
  2. erc20_test_call is a Contract package which contains the utility contract required to read the balances and allowances of users within the ERC-20 state.