how to get the decimal of a mint address?

[yangyile1990]

{
"info": {
"amount": "404469000000",
"authority": "BEj8jY6a41Mfyqz7KvHFqhakQmWYY2xsSKfvPx2poB9d",
"destination": "5m3joKpY9vKqA2daofrmjnjAc45EdjURyRU3M85Q2VKE",
"source": "6pPARkoGAYDozZqwv36ZPFG3FBGRjErNL7Dg4MGEhuBu"
},
"type": "transfer"
}

then I get the mint address is:
bitsTXvEAEgZNfadxjJTEMqnaDwGpjk255YrRGfTyp8

then I use this:

curl --location 'https://api.mainnet-beta.solana.com' \
--header 'Content-Type: application/json' \
--data '{
    "method": "getAccountInfo",
    "jsonrpc": "2.0",
    "params": [
        "bitsTXvEAEgZNfadxjJTEMqnaDwGpjk255YrRGfTyp8",
        {
            "encoding": "jsonParsed"
        }
    ],
    "id": "e064a6e9-dca7-4258-8308-7f8a8162adf7"
}'

get:

{
    "jsonrpc": "2.0",
    "result": {
        "context": {
            "apiVersion": "1.14.23",
            "slot": 212136054
        },
        "value": {
            "data": {
                "parsed": {
                    "info": {
                        "decimals": 5,
                        "freezeAuthority": "C6PvxYgZ8dmAmiYHmpYR2kQaSUpPy5RdXj94kzEhre7f",
                        "isInitialized": true,
                        "mintAuthority": "C6PvxYgZ8dmAmiYHmpYR2kQaSUpPy5RdXj94kzEhre7f",
                        "supply": "906958523307480289"
                    },
                    "type": "mint"
                },
                "program": "spl-token",
                "space": 82
            },
            "executable": false,
            "lamports": 1461600,
            "owner": "TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA",
            "rentEpoch": 0
        }
    },
    "id": "e064a6e9-dca7-4258-8308-7f8a8162adf7"
}

while. I think should give the a function:

func GetMintDecimals(mintAddress string) (uint8, error){}

input: bitsTXvEAEgZNfadxjJTEMqnaDwGpjk255YrRGfTyp8
output: 5, nil

[yangyile1990]

my code is:

func GetMintDecimals(endpoint string, mintAddress string) (int, *utils_erc.Erc) {
	var resp = struct {
		Result struct {
			Value struct {
				Data struct {
					Parsed struct {
						Info struct {
							Decimals int `json:"decimals"`
						} `json:"info"`
						Type string `json:"type"`
					} `json:"parsed"`
				} `json:"data"`
			} `json:"value"`
		} `json:"result"`
	}{}
	response, err := uvchain_resty2.NewHttp().SetRetryCount(3).
		SetTimeout(time.Second*3).
		R().
		SetResult(&resp).
		SetHeader("Accept", "application/json").
		SetBody(map[string]any{
			"method":  "getAccountInfo",
			"jsonrpc": "2.0",
			"params": []any{
				mintAddress,
				map[string]any{
					"encoding": "jsonParsed",
				},
			},
			"id": uuid.New().String(),
		}).
		Post(endpoint)
	if err != nil {
		return 0, utils_erc.GetGen().NewErc(utils_erc.CODE_THIRD_REQ_ERROR, err.Error())
	}
	if response.StatusCode() != 200 {
		return 0, utils_erc.GetGen().NewErc(utils_erc.CODE_THIRD_REQ_ERROR, response.Status())
	}
	if typ := resp.Result.Value.Data.Parsed.Type; typ != "mint" {
		return 0, utils_erc.GetGen().NewErc(utils_erc.CODE_NODE_RESP_ERROR, "not mint", typ)
	}
	return resp.Result.Value.Data.Parsed.Info.Decimals, nil
}

while, I think, your sdk can give me the function.

[ryanCool]

@yangyile1990 below code should work

tokenPubKey := solana.MustPublicKeyFromBase58("Es9vMFrzaCERmJfrF4H2FYD4KCoNkY11McCe8BenwNYB")
accountInfo, err := solanaClient.GetTokenSupply(
	context.TODO(),
	tokenPubKey,
	rpc.CommitmentFinalized,
)

fmt.Println(accountInfo.Value.Decimals)