Merge branch 'main' into feat/json-in-ui

Set payment as default transaction

README.md

@@ -1,6 +1,8 @@
-# XRPL Hooks IDE
+# XRPL Hooks Builder
 
-This is the repository for XRPL Hooks IDE. This project is built with Next.JS
+https://hooks-builder.xrpl.org/
+
+This is the repository for XRPL Hooks Builder. This project is built with Next.JS
 
 ## General
 

components/Accounts.tsx

@@ -294,7 +294,6 @@ const Accounts: FC<AccountProps> = (props) => {
           })
         );
         const responses = await Promise.all(requests);
-        console.log(responses);
         responses.forEach((res: any) => {
           const address = res?.account_data?.Account as string;
           const balance = res?.account_data?.Balance as string;
@@ -356,7 +355,7 @@ const Accounts: FC<AccountProps> = (props) => {
       }
     };
     // eslint-disable-next-line react-hooks/exhaustive-deps
-  }, [snap.accounts, snap.clientStatus]);
+  }, [snap.accounts.length, snap.clientStatus]);
   return (
     <Box
       as="div"
@@ -470,7 +469,7 @@ const Accounts: FC<AccountProps> = (props) => {
                       e.stopPropagation();
                     }}
                   >
-                    <SetHookDialog account={account} />
+                    <SetHookDialog accountAddress={account.address} />
                   </div>
                 )}
               </Flex>

components/SetHookDialog.tsx

@@ -21,11 +21,11 @@ import {
 
 import { TTS, tts } from "../utils/hookOnCalculator";
 import { deployHook } from "../state/actions";
-import type { IAccount } from "../state";
 import { useSnapshot } from "valtio";
 import state from "../state";
 import toast from "react-hot-toast";
-import { sha256 } from "../state/actions/deployHook";
+import { prepareDeployHookTx, sha256 } from "../state/actions/deployHook";
+import estimateFee from "../utils/estimateFee";
 
 const transactionOptions = Object.keys(tts).map((key) => ({
   label: key,
@@ -37,6 +37,7 @@ export type SetHookData = {
     value: keyof TTS;
     label: string;
   }[];
+  Fee: string;
   HookNamespace: string;
   HookParameters: {
     HookParameter: {
@@ -52,176 +53,285 @@ export type SetHookData = {
   // }[];
 };
 
-export const SetHookDialog: React.FC<{ account: IAccount }> = ({ account }) => {
+export const SetHookDialog: React.FC<{ accountAddress: string }> = React.memo(
-  const snap = useSnapshot(state);
+  ({ accountAddress }) => {
-  const [isSetHookDialogOpen, setIsSetHookDialogOpen] = useState(false);
+    const snap = useSnapshot(state);
-  const {
+    const account = snap.accounts.find((acc) => acc.address === accountAddress);
-    register,
-    handleSubmit,
-    control,
-    watch,
-    setValue,
-    formState: { errors },
-  } = useForm<SetHookData>({
-    defaultValues: {
-      HookNamespace: snap.files?.[snap.activeWat]?.name?.split(".")?.[0] || "",
-    },
-  });
-  const { fields, append, remove } = useFieldArray({
-    control,
-    name: "HookParameters", // unique name for your Field Array
-  });
 
-  // Update value if activeWat changes
+    const [isSetHookDialogOpen, setIsSetHookDialogOpen] = useState(false);
-  useEffect(() => {
+    const {
-    setValue(
+      register,
+      handleSubmit,
+      control,
+      watch,
+      setValue,
+      getValues,
+      formState: { errors },
+    } = useForm<SetHookData>({
+      defaultValues: {
+        HookNamespace:
+          snap.files?.[snap.activeWat]?.name?.split(".")?.[0] || "",
+        Invoke: transactionOptions.filter((to) => to.label === "ttPAYMENT"),
+      },
+    });
+    const { fields, append, remove } = useFieldArray({
+      control,
+      name: "HookParameters", // unique name for your Field Array
+    });
+    const [formInitialized, setFormInitialized] = useState(false);
+    const [estimateLoading, setEstimateLoading] = useState(false);
+    const watchedFee = watch("Fee");
+    // Update value if activeWat changes
+    useEffect(() => {
+      setValue(
+        "HookNamespace",
+        snap.files?.[snap.activeWat]?.name?.split(".")?.[0] || ""
+      );
+      setFormInitialized(true);
+    }, [snap.activeWat, snap.files, setValue]);
+    useEffect(() => {
+      if (
+        watchedFee &&
+        (watchedFee.includes(".") || watchedFee.includes(","))
+      ) {
+        setValue("Fee", watchedFee.replaceAll(".", "").replaceAll(",", ""));
+      }
+    }, [watchedFee, setValue]);
+    // const {
+    //   fields: grantFields,
+    //   append: grantAppend,
+    //   remove: grantRemove,
+    // } = useFieldArray({
+    //   control,
+    //   name: "HookGrants", // unique name for your Field Array
+    // });
+    const [hashedNamespace, setHashedNamespace] = useState("");
+    const namespace = watch(
       "HookNamespace",
-      snap.files?.[snap.activeWat]?.name?.split(".")?.[0] || ""
+      snap.files?.[snap.active]?.name?.split(".")?.[0] || ""
     );
-  }, [snap.activeWat, snap.files, setValue]);
+    const calculateHashedValue = useCallback(async () => {
-  // const {
+      const hashedVal = await sha256(namespace);
-  //   fields: grantFields,
+      setHashedNamespace(hashedVal.toUpperCase());
-  //   append: grantAppend,
+    }, [namespace]);
-  //   remove: grantRemove,
+    useEffect(() => {
-  // } = useFieldArray({
+      calculateHashedValue();
-  //   control,
+    }, [namespace, calculateHashedValue]);
-  //   name: "HookGrants", // unique name for your Field Array
-  // });
-  const [hashedNamespace, setHashedNamespace] = useState("");
-  const namespace = watch(
-    "HookNamespace",
-    snap.files?.[snap.active]?.name?.split(".")?.[0] || ""
-  );
-  const calculateHashedValue = useCallback(async () => {
-    const hashedVal = await sha256(namespace);
-    setHashedNamespace(hashedVal.toUpperCase());
-  }, [namespace]);
-  useEffect(() => {
-    calculateHashedValue();
-  }, [namespace, calculateHashedValue]);
 
-  if (!account) {
+    // Calcucate initial fee estimate when modal opens
-    return null;
+    useEffect(() => {
-  }
+      if (formInitialized && account) {
-
+        (async () => {
-  const onSubmit: SubmitHandler<SetHookData> = async (data) => {
+          const formValues = getValues();
-    const currAccount = state.accounts.find(
+          const tx = await prepareDeployHookTx(account, formValues);
-      (acc) => acc.address === account.address
+          if (!tx) {
-    );
+            return;
-    if (currAccount) currAccount.isLoading = true;
-    const res = await deployHook(account, data);
-    if (currAccount) currAccount.isLoading = false;
-
-    if (res && res.engine_result === "tesSUCCESS") {
-      toast.success("Transaction succeeded!");
-      return setIsSetHookDialogOpen(false);
-    }
-    toast.error(`Transaction failed! (${res?.engine_result_message})`);
-  };
-
-  return (
-    <Dialog open={isSetHookDialogOpen} onOpenChange={setIsSetHookDialogOpen}>
-      <DialogTrigger asChild>
-        <Button
-          ghost
-          size="xs"
-          uppercase
-          variant={"secondary"}
-          disabled={
-            account.isLoading ||
-            !snap.files.filter((file) => file.compiledWatContent).length
           }
-        >
+          const res = await estimateFee(tx, account);
-          Set Hook
+          if (res && res.base_fee) {
-        </Button>
+            setValue("Fee", Math.round(Number(res.base_fee || "")).toString());
-      </DialogTrigger>
+          }
-      <DialogContent>
+        })();
-        <form onSubmit={handleSubmit(onSubmit)}>
+      }
-          <DialogTitle>Deploy configuration</DialogTitle>
+      // eslint-disable-next-line react-hooks/exhaustive-deps
-          <DialogDescription as="div">
+    }, [formInitialized]);
-            <Stack css={{ width: "100%", flex: 1 }}>
+
-              <Box css={{ width: "100%" }}>
+    if (!account) {
-                <Label>Invoke on transactions</Label>
+      return null;
-                <Controller
+    }
-                  name="Invoke"
+
-                  control={control}
+    const onSubmit: SubmitHandler<SetHookData> = async (data) => {
-                  defaultValue={transactionOptions.filter(
+      const currAccount = state.accounts.find(
-                    (to) => to.label === "ttPAYMENT"
+        (acc) => acc.address === account.address
-                  )}
+      );
-                  render={({ field }) => (
+      if (currAccount) currAccount.isLoading = true;
-                    <Select
+      const res = await deployHook(account, data);
-                      {...field}
+      if (currAccount) currAccount.isLoading = false;
-                      closeMenuOnSelect={false}
+
-                      isMulti
+      if (res && res.engine_result === "tesSUCCESS") {
-                      menuPosition="fixed"
+        toast.success("Transaction succeeded!");
-                      options={transactionOptions}
+        return setIsSetHookDialogOpen(false);
-                    />
+      }
-                  )}
+      toast.error(`Transaction failed! (${res?.engine_result_message})`);
-                />
+    };
-              </Box>
+    return (
-              <Box css={{ width: "100%" }}>
+      <Dialog open={isSetHookDialogOpen} onOpenChange={setIsSetHookDialogOpen}>
-                <Label>Hook Namespace Seed</Label>
+        <DialogTrigger asChild>
-                <Input
+          <Button
-                  {...register("HookNamespace", { required: true })}
+            ghost
-                  autoComplete={"off"}
+            size="xs"
-                  defaultValue={
+            uppercase
-                    snap.files?.[snap.activeWat]?.name?.split(".")?.[0] || ""
+            variant={"secondary"}
-                  }
+            disabled={
-                />
+              account.isLoading ||
-                {errors.HookNamespace?.type === "required" && (
+              !snap.files.filter((file) => file.compiledWatContent).length
-                  <Box css={{ display: "inline", color: "$red11" }}>
+            }
-                    Namespace is required
+          >
-                  </Box>
+            Set Hook
-                )}
+          </Button>
-                <Box css={{ mt: "$3" }}>
+        </DialogTrigger>
-                  <Label>Hook Namespace (sha256)</Label>
+        <DialogContent>
-                  <Input readOnly value={hashedNamespace} />
+          <form onSubmit={handleSubmit(onSubmit)}>
+            <DialogTitle>Deploy configuration</DialogTitle>
+            <DialogDescription as="div">
+              <Stack css={{ width: "100%", flex: 1 }}>
+                <Box css={{ width: "100%" }}>
+                  <Label>Invoke on transactions</Label>
+                  <Controller
+                    name="Invoke"
+                    control={control}
+                    defaultValue={transactionOptions.filter(
+                      (to) => to.label === "ttPAYMENT"
+                    )}
+                    render={({ field }) => (
+                      <Select
+                        {...field}
+                        closeMenuOnSelect={false}
+                        isMulti
+                        menuPosition="fixed"
+                        options={transactionOptions}
+                      />
+                    )}
+                  />
                 </Box>
-              </Box>
+                <Box css={{ width: "100%" }}>
-              <Box css={{ width: "100%" }}>
+                  <Label>Hook Namespace Seed</Label>
-                <Label style={{ marginBottom: "10px", display: "block" }}>
+                  <Input
-                  Hook parameters
+                    {...register("HookNamespace", { required: true })}
-                </Label>
+                    autoComplete={"off"}
-                <Stack>
+                    defaultValue={
-                  {fields.map((field, index) => (
+                      snap.files?.[snap.activeWat]?.name?.split(".")?.[0] || ""
-                    <Stack key={field.id}>
-                      <Input
-                        // important to include key with field's id
-                        placeholder="Parameter name"
-                        {...register(
-                          `HookParameters.${index}.HookParameter.HookParameterName`
-                        )}
-                      />
-                      <Input
-                        placeholder="Value (hex-quoted)"
-                        {...register(
-                          `HookParameters.${index}.HookParameter.HookParameterValue`
-                        )}
-                      />
-                      <Button onClick={() => remove(index)} variant="destroy">
-                        <Trash weight="regular" size="16px" />
-                      </Button>
-                    </Stack>
-                  ))}
-                  <Button
-                    outline
-                    fullWidth
-                    type="button"
-                    onClick={() =>
-                      append({
-                        HookParameter: {
-                          HookParameterName: "",
-                          HookParameterValue: "",
-                        },
-                      })
                     }
-                  >
+                  />
-                    <Plus size="16px" />
+                  {errors.HookNamespace?.type === "required" && (
-                    Add Hook Parameter
+                    <Box css={{ display: "inline", color: "$red11" }}>
-                  </Button>
+                      Namespace is required
-                </Stack>
+                    </Box>
-              </Box>
+                  )}
-              {/* <Box css={{ width: "100%" }}>
+                  <Box css={{ mt: "$3" }}>
+                    <Label>Hook Namespace (sha256)</Label>
+                    <Input readOnly value={hashedNamespace} />
+                  </Box>
+                </Box>
+
+                <Box css={{ width: "100%" }}>
+                  <Label style={{ marginBottom: "10px", display: "block" }}>
+                    Hook parameters
+                  </Label>
+                  <Stack>
+                    {fields.map((field, index) => (
+                      <Stack key={field.id}>
+                        <Input
+                          // important to include key with field's id
+                          placeholder="Parameter name"
+                          {...register(
+                            `HookParameters.${index}.HookParameter.HookParameterName`
+                          )}
+                        />
+                        <Input
+                          placeholder="Value (hex-quoted)"
+                          {...register(
+                            `HookParameters.${index}.HookParameter.HookParameterValue`
+                          )}
+                        />
+                        <Button onClick={() => remove(index)} variant="destroy">
+                          <Trash weight="regular" size="16px" />
+                        </Button>
+                      </Stack>
+                    ))}
+                    <Button
+                      outline
+                      fullWidth
+                      type="button"
+                      onClick={() =>
+                        append({
+                          HookParameter: {
+                            HookParameterName: "",
+                            HookParameterValue: "",
+                          },
+                        })
+                      }
+                    >
+                      <Plus size="16px" />
+                      Add Hook Parameter
+                    </Button>
+                  </Stack>
+                </Box>
+                <Box css={{ width: "100%", position: "relative" }}>
+                  <Label>Fee</Label>
+                  <Box css={{ display: "flex", alignItems: "center" }}>
+                    <Input
+                      type="number"
+                      {...register("Fee", { required: true })}
+                      autoComplete={"off"}
+                      onKeyPress={(e) => {
+                        if (e.key === "." || e.key === ",") {
+                          e.preventDefault();
+                        }
+                      }}
+                      step="1"
+                      defaultValue={10000}
+                      css={{
+                        "-moz-appearance": "textfield",
+                        "&::-webkit-outer-spin-button": {
+                          "-webkit-appearance": "none",
+                          margin: 0,
+                        },
+                        "&::-webkit-inner-spin-button ": {
+                          "-webkit-appearance": "none",
+                          margin: 0,
+                        },
+                      }}
+                    />
+                    <Button
+                      size="xs"
+                      variant="primary"
+                      outline
+                      isLoading={estimateLoading}
+                      css={{
+                        position: "absolute",
+                        right: "$2",
+                        fontSize: "$xs",
+                        cursor: "pointer",
+                        alignContent: "center",
+                        display: "flex",
+                      }}
+                      onClick={async (e) => {
+                        e.preventDefault();
+                        setEstimateLoading(true);
+                        const formValues = getValues();
+                        try {
+                          const tx = await prepareDeployHookTx(
+                            account,
+                            formValues
+                          );
+                          if (tx) {
+                            const res = await estimateFee(tx, account);
+
+                            if (res && res.base_fee) {
+                              setValue(
+                                "Fee",
+                                Math.round(
+                                  Number(res.base_fee || "")
+                                ).toString()
+                              );
+                            }
+                          }
+                        } catch (err) {}
+
+                        setEstimateLoading(false);
+                      }}
+                    >
+                      Suggest
+                    </Button>
+                  </Box>
+                  {errors.Fee?.type === "required" && (
+                    <Box css={{ display: "inline", color: "$red11" }}>
+                      Fee is required
+                    </Box>
+                  )}
+                </Box>
+                {/* <Box css={{ width: "100%" }}>
                 <label style={{ marginBottom: "10px", display: "block" }}>
                   Hook Grants
                 </label>
@@ -269,38 +379,41 @@ export const SetHookDialog: React.FC<{ account: IAccount }> = ({ account }) => {
                   </Button>
                 </Stack>
               </Box> */}
-            </Stack>
+              </Stack>
-          </DialogDescription>
+            </DialogDescription>
 
-          <Flex
+            <Flex
-            css={{
+              css={{
-              marginTop: 25,
+                marginTop: 25,
-              justifyContent: "flex-end",
+                justifyContent: "flex-end",
-              gap: "$3",
+                gap: "$3",
-            }}
+              }}
-          >
-            <DialogClose asChild>
-              <Button outline>Cancel</Button>
-            </DialogClose>
-            {/* <DialogClose asChild> */}
-            <Button
-              variant="primary"
-              type="submit"
-              isLoading={account.isLoading}
             >
-              Set Hook
+              <DialogClose asChild>
-            </Button>
+                <Button outline>Cancel</Button>
-            {/* </DialogClose> */}
+              </DialogClose>
-          </Flex>
+              {/* <DialogClose asChild> */}
-          <DialogClose asChild>
+              <Button
-            <Box css={{ position: "absolute", top: "$3", right: "$3" }}>
+                variant="primary"
-              <X size="20px" />
+                type="submit"
-            </Box>
+                isLoading={account.isLoading}
-          </DialogClose>
+              >
-        </form>
+                Set Hook
-      </DialogContent>
+              </Button>
-    </Dialog>
+              {/* </DialogClose> */}
-  );
+            </Flex>
-};
+            <DialogClose asChild>
+              <Box css={{ position: "absolute", top: "$3", right: "$3" }}>
+                <X size="20px" />
+              </Box>
+            </DialogClose>
+          </form>
+        </DialogContent>
+      </Dialog>
+    );
+  }
+);
+
+SetHookDialog.displayName = "SetHookDialog";
 
 export default SetHookDialog;

components/Textarea.tsx

@@ -0,0 +1,115 @@
+import { styled } from "../stitches.config";
+
+export const Textarea = styled("textarea", {
+  // Reset
+  appearance: "none",
+  borderWidth: "0",
+  boxSizing: "border-box",
+  fontFamily: "inherit",
+  outline: "none",
+  width: "100%",
+  flex: "1",
+  backgroundColor: "$mauve4",
+  display: "inline-flex",
+  alignItems: "center",
+  justifyContent: "center",
+  borderRadius: "$sm",
+  p: "$2",
+  fontSize: "$md",
+  lineHeight: 1,
+  color: "$mauve12",
+  boxShadow: `0 0 0 1px $colors$mauve8`,
+  WebkitTapHighlightColor: "rgba(0,0,0,0)",
+  "&::before": {
+    boxSizing: "border-box",
+  },
+  "&::after": {
+    boxSizing: "border-box",
+  },
+  fontVariantNumeric: "tabular-nums",
+
+  "&:-webkit-autofill": {
+    boxShadow: "inset 0 0 0 1px $colors$blue6, inset 0 0 0 100px $colors$blue3",
+  },
+
+  "&:-webkit-autofill::first-line": {
+    fontFamily: "$untitled",
+    color: "$mauve12",
+  },
+
+  "&:focus": {
+    boxShadow: `0 0 0 1px $colors$mauve10`,
+    "&:-webkit-autofill": {
+      boxShadow: `0 0 0 1px $colors$mauve10`,
+    },
+  },
+  "&::placeholder": {
+    color: "$mauve9",
+  },
+  "&:disabled": {
+    pointerEvents: "none",
+    backgroundColor: "$mauve2",
+    color: "$mauve8",
+    cursor: "not-allowed",
+    "&::placeholder": {
+      color: "$mauve7",
+    },
+  },
+
+  variants: {
+    variant: {
+      ghost: {
+        boxShadow: "none",
+        backgroundColor: "transparent",
+        "@hover": {
+          "&:hover": {
+            boxShadow: "inset 0 0 0 1px $colors$mauve7",
+          },
+        },
+        "&:focus": {
+          backgroundColor: "$loContrast",
+          boxShadow: `0 0 0 1px $colors$mauve10`,
+        },
+        "&:disabled": {
+          backgroundColor: "transparent",
+        },
+        "&:read-only": {
+          backgroundColor: "transparent",
+        },
+      },
+      deep: {
+        backgroundColor: "$deep",
+        boxShadow: "none",
+      },
+    },
+    state: {
+      invalid: {
+        boxShadow: "inset 0 0 0 1px $colors$crimson7",
+        "&:focus": {
+          boxShadow:
+            "inset 0px 0px 0px 1px $colors$crimson8, 0px 0px 0px 1px $colors$crimson8",
+        },
+      },
+      valid: {
+        boxShadow: "inset 0 0 0 1px $colors$grass7",
+        "&:focus": {
+          boxShadow:
+            "inset 0px 0px 0px 1px $colors$grass8, 0px 0px 0px 1px $colors$grass8",
+        },
+      },
+    },
+    cursor: {
+      default: {
+        cursor: "default",
+        "&:focus": {
+          cursor: "text",
+        },
+      },
+      text: {
+        cursor: "text",
+      },
+    },
+  },
+});
+
+export default Textarea;

components/Transaction/index.tsx

@@ -14,6 +14,8 @@ import Button from "../Button";
 import Flex from "../Flex";
 import { TxJson } from "./json";
 import { TxUI } from "./ui";
+import { default as _estimateFee } from "../../utils/estimateFee";
+import toast from 'react-hot-toast';
 
 export interface TransactionProps {
   header: string;
@@ -76,13 +78,19 @@ const Transaction: FC<TransactionProps> = ({
     } else {
       setState({ txIsDisabled: false });
     }
-  }, [selectedAccount?.value, selectedTransaction?.value, setState, txIsLoading]);
+  }, [
+    selectedAccount?.value,
+    selectedTransaction?.value,
+    setState,
+    txIsLoading,
+  ]);
 
   const submitTest = useCallback(async () => {
     let st: TransactionState | undefined;
+    const tt = txState.selectedTransaction?.value;
     if (viewType === "json") {
       // save the editor state first
-      const pst = prepareState(editorValue || '', txState);
+      const pst = prepareState(editorValue || "", tt);
       if (!pst) return;
 
       st = setState(pst);
@@ -102,7 +110,7 @@ const Transaction: FC<TransactionProps> = ({
       const options = prepareOptions(st);
 
       if (options.Destination === null) {
-        throw Error("Destination account cannot be null")
+        throw Error("Destination account cannot be null");
       }
 
       await sendTransaction(account, options, { logPrefix });
@@ -116,7 +124,17 @@ const Transaction: FC<TransactionProps> = ({
       }
     }
     setState({ txIsLoading: false });
-  }, [viewType, accounts, txIsDisabled, setState, header, editorValue, txState, selectedAccount?.value, prepareOptions]);
+  }, [
+    viewType,
+    accounts,
+    txIsDisabled,
+    setState,
+    header,
+    editorValue,
+    txState,
+    selectedAccount?.value,
+    prepareOptions,
+  ]);
 
   const resetState = useCallback(() => {
     modifyTransaction(header, { viewType }, { replaceState: true });
@@ -129,6 +147,31 @@ const Transaction: FC<TransactionProps> = ({
     [editorSavedValue, editorSettings.tabSize, prepareOptions]
   );
 
+  const estimateFee = useCallback(
+    async (st?: TransactionState, opts?: { silent?: boolean }) => {
+      const state = st || txState;
+      const ptx = prepareOptions(state);
+      const account = accounts.find(
+        acc => acc.address === state.selectedAccount?.value
+      );
+      if (!account) {
+        if (!opts?.silent) {
+          toast.error("Please select account from the list.")
+        }
+        return
+      };
+
+      ptx.Account = account.address;
+      ptx.Sequence = account.sequence;
+
+      const res = await _estimateFee(ptx, account, opts);
+      const fee = res?.base_fee;
+      setState({ estimatedFee: fee });
+      return fee;
+    },
+    [accounts, prepareOptions, setState, txState]
+  );
+
   return (
     <Box css={{ position: "relative", height: "calc(100% - 28px)" }} {...props}>
       {viewType === "json" ? (
@@ -137,9 +180,10 @@ const Transaction: FC<TransactionProps> = ({
           header={header}
           state={txState}
           setState={setState}
+          estimateFee={estimateFee}
         />
       ) : (
-        <TxUI state={txState} setState={setState} />
+        <TxUI state={txState} setState={setState} estimateFee={estimateFee} />
       )}
       <Flex
         row

components/Transaction/json.tsx

@@ -29,6 +29,7 @@ interface JsonProps {
   header?: string;
   setState: (pTx?: Partial<TransactionState> | undefined) => void;
   state: TransactionState;
+  estimateFee?: () => Promise<string | undefined>;
 }
 
 export const TxJson: FC<JsonProps> = ({
@@ -38,22 +39,37 @@ export const TxJson: FC<JsonProps> = ({
   setState,
 }) => {
   const { editorSettings, accounts } = useSnapshot(state);
-  const { editorValue = value, selectedTransaction } = txState;
+  const { editorValue = value, estimatedFee } = txState;
   const { theme } = useTheme();
   const [hasUnsaved, setHasUnsaved] = useState(false);
+  const [currTxType, setCurrTxType] = useState<string | undefined>(
+    txState.selectedTransaction?.value
+  );
 
   useEffect(() => {
     setState({ editorValue: value });
     // eslint-disable-next-line react-hooks/exhaustive-deps
   }, [value]);
 
+  useEffect(() => {
+    const parsed = parseJSON(editorValue);
+    if (!parsed) return;
+
+    const tt = parsed.TransactionType;
+    const tx = transactionsData.find(t => t.TransactionType === tt);
+    if (tx) setCurrTxType(tx.TransactionType);
+    else {
+      setCurrTxType(undefined);
+    }
+  }, [editorValue]);
+
   useEffect(() => {
     if (editorValue === value) setHasUnsaved(false);
     else setHasUnsaved(true);
   }, [editorValue, value]);
 
-  const saveState = (value: string, txState: TransactionState) => {
+  const saveState = (value: string, transactionType?: string) => {
-    const tx = prepareState(value, txState);
+    const tx = prepareState(value, transactionType);
     if (tx) setState(tx);
   };
 
@@ -68,7 +84,7 @@ export const TxJson: FC<JsonProps> = ({
   const onExit = (value: string) => {
     const options = parseJSON(value);
     if (options) {
-      saveState(value, txState);
+      saveState(value, currTxType);
       return;
     }
     showAlert("Error!", {
@@ -82,9 +98,10 @@ export const TxJson: FC<JsonProps> = ({
   const path = `file:///${header}`;
   const monaco = useMonaco();
 
-  const getSchemas = useCallback((): any[] => {
+  const getSchemas = useCallback(async (): Promise<any[]> => {
-    const tt = selectedTransaction?.value;
+    const txObj = transactionsData.find(
-    const txObj = transactionsData.find(td => td.TransactionType === tt);
+      td => td.TransactionType === currTxType
+    );
 
     let genericSchemaProps: any;
     if (txObj) {
@@ -98,7 +115,6 @@ export const TxJson: FC<JsonProps> = ({
         {}
       );
     }
-
     return [
       {
         uri: "file:///main-schema.json", // id of the first schema
@@ -130,6 +146,9 @@ export const TxJson: FC<JsonProps> = ({
             Amount: {
               $ref: "file:///amount-schema.json",
             },
+            Fee: {
+              $ref: "file:///fee-schema.json",
+            },
           },
         },
       },
@@ -141,17 +160,30 @@ export const TxJson: FC<JsonProps> = ({
           enum: accounts.map(acc => acc.address),
         },
       },
+      {
+        uri: "file:///fee-schema.json",
+        schema: {
+          type: "string",
+          title: "Fee type",
+          const: estimatedFee,
+          description: estimatedFee
+            ? "Above mentioned value is recommended base fee"
+            : undefined,
+        },
+      },
       {
         ...amountSchema,
       },
     ];
-  }, [accounts, header, selectedTransaction?.value]);
+  }, [accounts, currTxType, estimatedFee, header]);
 
   useEffect(() => {
     if (!monaco) return;
-    monaco.languages.json.jsonDefaults.setDiagnosticsOptions({
+    getSchemas().then(schemas => {
-      validate: true,
+      monaco.languages.json.jsonDefaults.setDiagnosticsOptions({
-      schemas: getSchemas(),
+        validate: true,
+        schemas,
+      });
     });
   }, [getSchemas, monaco]);
 
@@ -184,19 +216,13 @@ export const TxJson: FC<JsonProps> = ({
           // register onExit cb
           const model = editor.getModel();
           model?.onWillDispose(() => onExit(model.getValue()));
-
-          // set json defaults
-          monaco.languages.json.jsonDefaults.setDiagnosticsOptions({
-            validate: true,
-            schemas: getSchemas(),
-          });
         }}
         theme={theme === "dark" ? "dark" : "light"}
       />
       {hasUnsaved && (
         <Text muted small css={{ position: "absolute", bottom: 0, right: 0 }}>
           This file has unsaved changes.{" "}
-          <Link onClick={() => saveState(editorValue, txState)}>save</Link>{" "}
+          <Link onClick={() => saveState(editorValue, currTxType)}>save</Link>{" "}
           <Link onClick={discardChanges}>discard</Link>
         </Text>
       )}

components/Transaction/ui.tsx

@@ -1,4 +1,4 @@
-import { FC } from "react";
+import { FC, useCallback, useEffect, useState } from "react";
 import Container from "../Container";
 import Flex from "../Flex";
 import Input from "../Input";
@@ -9,17 +9,27 @@ import {
   TransactionState,
   transactionsData,
   TxFields,
+  getTxFields,
 } from "../../state/transactions";
 import { useSnapshot } from "valtio";
 import state from "../../state";
 import { streamState } from "../DebugStream";
+import { Button } from "..";
+import Textarea from "../Textarea";
 
 interface UIProps {
-  setState: (pTx?: Partial<TransactionState> | undefined) => void;
+  setState: (
+    pTx?: Partial<TransactionState> | undefined
+  ) => TransactionState | undefined;
   state: TransactionState;
+  estimateFee?: (...arg: any) => Promise<string | undefined>;
 }
 
-export const TxUI: FC<UIProps> = ({ state: txState, setState }) => {
+export const TxUI: FC<UIProps> = ({
+  state: txState,
+  setState,
+  estimateFee,
+}) => {
   const { accounts } = useSnapshot(state);
   const {
     selectedAccount,
@@ -45,32 +55,54 @@ export const TxUI: FC<UIProps> = ({ state: txState, setState }) => {
     }))
     .filter(acc => acc.value !== selectedAccount?.value);
 
-  const resetOptions = (tt: string) => {
+  const [feeLoading, setFeeLoading] = useState(false);
-    const txFields: TxFields | undefined = transactionsData.find(
-      tx => tx.TransactionType === tt
-    );
 
-    if (!txFields) return setState({ txFields: {} });
+  const resetOptions = useCallback(
-
+    (tt: string) => {
-    const _txFields = Object.keys(txFields)
+      const fields = getTxFields(tt);
-      .filter(key => !["TransactionType", "Account", "Sequence"].includes(key))
+      if (!fields.Destination) setState({ selectedDestAccount: null });
-      .reduce<TxFields>(
+      return setState({ txFields: fields });
-        (tf, key) => ((tf[key as keyof TxFields] = (txFields as any)[key]), tf),
+    },
-        {}
+    [setState]
-      );
+  );
-
-    if (!_txFields.Destination) setState({ selectedDestAccount: null });
-    setState({ txFields: _txFields });
-  };
 
   const handleSetAccount = (acc: SelectOption) => {
     setState({ selectedAccount: acc });
     streamState.selectedAccount = acc;
   };
 
+  const handleSetField = useCallback(
+    (field: keyof TxFields, value: string, opFields?: TxFields) => {
+      const fields = opFields || txFields;
+      const obj = fields[field];
+      setState({
+        txFields: {
+          ...fields,
+          [field]: typeof obj === "object" ? { ...obj, $value: value } : value,
+        },
+      });
+    },
+    [setState, txFields]
+  );
+
+  const handleEstimateFee = useCallback(
+    async (state?: TransactionState, silent?: boolean) => {
+      setFeeLoading(true);
+
+      const fee = await estimateFee?.(state, { silent });
+      if (fee) handleSetField("Fee", fee, state?.txFields);
+
+      setFeeLoading(false);
+    },
+    [estimateFee, handleSetField]
+  );
+
   const handleChangeTxType = (tt: SelectOption) => {
     setState({ selectedTransaction: tt });
-    resetOptions(tt.value);
+
+    const newState = resetOptions(tt.value);
+
+    handleEstimateFee(newState, true);
   };
 
   const specialFields = ["TransactionType", "Account", "Destination"];
@@ -79,6 +111,19 @@ export const TxUI: FC<UIProps> = ({ state: txState, setState }) => {
     k => !specialFields.includes(k)
   ) as [keyof TxFields];
 
+  const switchToJson = () =>
+    setState({ editorSavedValue: null, viewType: "json" });
+  
+  useEffect(() => {
+    const defaultOption = transactionsOptions.find(
+      tt => tt.value === "Payment"
+    );
+    if (defaultOption) {
+      handleChangeTxType(defaultOption);
+    }
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, []);
+
   return (
     <Container
       css={{
@@ -87,7 +132,7 @@ export const TxUI: FC<UIProps> = ({ state: txState, setState }) => {
         height: "calc(100% - 45px)",
       }}
     >
-      <Flex column fluid css={{ height: "100%", overflowY: "auto" }}>
+      <Flex column fluid css={{ height: "100%", overflowY: "auto", pr: "$1" }}>
         <Flex
           row
           fluid
@@ -165,7 +210,7 @@ export const TxUI: FC<UIProps> = ({ state: txState, setState }) => {
           let value: string | undefined;
           if (typeof _value === "object") {
             if (_value.$type === "json" && typeof _value.$value === "object") {
-              value = JSON.stringify(_value.$value);
+              value = JSON.stringify(_value.$value, null, 2);
             } else {
               value = _value.$value.toString();
             }
@@ -173,37 +218,71 @@ export const TxUI: FC<UIProps> = ({ state: txState, setState }) => {
             value = _value?.toString();
           }
 
-          let isXrp = typeof _value === "object" && _value.$type === "xrp";
+          const isXrp = typeof _value === "object" && _value.$type === "xrp";
+          const isJson = typeof _value === "object" && _value.$type === "json";
+          const isFee = field === "Fee";
+          let rows = isJson
+            ? (value?.match(/\n/gm)?.length || 0) + 1
+            : undefined;
+          if (rows && rows > 5) rows = 5;
           return (
-            <Flex
+            <Flex column key={field} css={{ mb: "$2", pr: "1px" }}>
-              key={field}
+              <Flex
-              row
+                row
-              fluid
+                fluid
-              css={{
+                css={{
-                justifyContent: "flex-end",
+                  justifyContent: "flex-end",
-                alignItems: "center",
+                  alignItems: "center",
-                mb: "$3",
+                  position: "relative",
-                pr: "1px",
-              }}
-            >
-              <Text muted css={{ mr: "$3" }}>
-                {field + (isXrp ? " (XRP)" : "")}:{" "}
-              </Text>
-              <Input
-                value={value}
-                onChange={e => {
-                  setState({
-                    txFields: {
-                      ...txFields,
-                      [field]:
-                        typeof _value === "object"
-                          ? { ..._value, $value: e.target.value }
-                          : e.target.value,
-                    },
-                  });
                 }}
-                css={{ width: "70%", flex: "inherit" }}
+              >
-              />
+                <Text muted css={{ mr: "$3" }}>
+                  {field + (isXrp ? " (XRP)" : "")}:{" "}
+                </Text>
+                {isJson ? (
+                  <Textarea
+                    rows={rows}
+                    value={value}
+                    spellCheck={false}
+                    onChange={switchToJson}
+                    css={{
+                      width: "70%",
+                      flex: "inherit",
+                      resize: "vertical",
+                    }}
+                  />
+                ) : (
+                  <Input
+                    value={value}
+                    onChange={e => {
+                      handleSetField(field, e.target.value);
+                    }}
+                    css={{
+                      width: "70%",
+                      flex: "inherit",
+                    }}
+                  />
+                )}
+                {isFee && (
+                  <Button
+                    size="xs"
+                    variant="primary"
+                    outline
+                    isLoading={feeLoading}
+                    css={{
+                      position: "absolute",
+                      right: "$2",
+                      fontSize: "$xs",
+                      cursor: "pointer",
+                      alignContent: "center",
+                      display: "flex",
+                    }}
+                    onClick={() => handleEstimateFee()}
+                  >
+                    Suggest
+                  </Button>
+                )}
+              </Flex>
             </Flex>
           );
         })}

pages/_app.tsx

@@ -62,10 +62,10 @@ function MyApp({ Component, pageProps: { session, ...pageProps } }: AppProps) {
         <meta property="og:url" content={`${origin}${router.asPath}`} />
 
         <title>XRPL Hooks Builder</title>
-        <meta property="og:title" content="XRPL Hooks Editor" />
+        <meta property="og:title" content="XRPL Hooks Builder" />
-        <meta name="twitter:title" content="XRPL Hooks Editor" />
+        <meta name="twitter:title" content="XRPL Hooks Builder" />
         <meta name="twitter:card" content="summary_large_image" />
-        <meta name="twitter:site" content="@xrpllabs" />
+        <meta name="twitter:site" content="@XRPLF" />
         <meta
           name="description"
           content="Hooks Builder, add smart contract functionality to the XRP Ledger."
@@ -101,7 +101,7 @@ function MyApp({ Component, pageProps: { session, ...pageProps } }: AppProps) {
         />
         <link rel="manifest" href="/site.webmanifest" />
         <link rel="mask-icon" href="/safari-pinned-tab.svg" color="#161618" />
-        <meta name="application-name" content="XRPL Hooks Editor" />
+        <meta name="application-name" content="XRPL Hooks Builder" />
         <meta name="msapplication-TileColor" content="#c10ad0" />
         <meta
           name="theme-color"

pages/develop/[[...slug]].tsx

@@ -1,5 +1,4 @@
 import { Label } from "@radix-ui/react-label";
-import { Switch, SwitchThumb } from "../../components/Switch";
 import type { NextPage } from "next";
 import dynamic from "next/dynamic";
 import { Gear, Play } from "phosphor-react";
@@ -141,59 +140,6 @@ const CompilerSettings = () => {
           </Button>
         </ButtonGroup>
       </Box>
-      <Box css={{ flexDirection: "column" }}>
-        <Label
-          style={{
-            flexDirection: "row",
-            display: "flex",
-          }}
-        >
-          Clean WASM (experimental){" "}
-          <Popover
-            css={{
-              maxWidth: "240px",
-              lineHeight: "1.3",
-              a: {
-                color: "$purple11",
-              },
-              ".dark &": {
-                backgroundColor: "$black !important",
-
-                ".arrow": {
-                  fill: "$colors$black",
-                },
-              },
-            }}
-            content="Cleaner removes unwanted compiler-provided exports and functions from a wasm binary to make it (more) suitable for being used as a Hook"
-          >
-            <Flex
-              css={{
-                position: "relative",
-                top: "-1px",
-                mx: "$1",
-                backgroundColor: "$mauve8",
-                borderRadius: "$full",
-                cursor: "pointer",
-                width: "16px",
-                height: "16px",
-                alignItems: "center",
-                justifyContent: "center",
-              }}
-            >
-              ?
-            </Flex>
-          </Popover>
-        </Label>
-        <Switch
-          css={{ mt: "$2" }}
-          checked={snap.compileOptions.strip}
-          onCheckedChange={(checked) => {
-            state.compileOptions.strip = checked;
-          }}
-        >
-          <SwitchThumb />
-        </Switch>
-      </Box>
     </Flex>
   );
 };
@@ -213,7 +159,7 @@ const Home: NextPage = () => {
     >
       <main style={{ display: "flex", flex: 1, position: "relative" }}>
         <HooksEditor />
-        {snap.files[snap.active]?.name?.split(".")?.[1].toLowerCase() ===
+        {snap.files[snap.active]?.name?.split(".")?.[1]?.toLowerCase() ===
           "c" && (
           <Hotkeys
             keyName="command+b,ctrl+b"

state/actions/deployHook.tsx

@@ -6,13 +6,14 @@ import calculateHookOn, { TTS } from "../../utils/hookOnCalculator";
 import { SetHookData } from "../../components/SetHookDialog";
 import { Link } from "../../components";
 import { ref } from "valtio";
+import estimateFee from "../../utils/estimateFee";
 
 export const sha256 = async (string: string) => {
   const utf8 = new TextEncoder().encode(string);
   const hashBuffer = await crypto.subtle.digest("SHA-256", utf8);
   const hashArray = Array.from(new Uint8Array(hashBuffer));
   const hashHex = hashArray
-    .map(bytes => bytes.toString(16).padStart(2, "0"))
+    .map((bytes) => bytes.toString(16).padStart(2, "0"))
     .join("");
   return hashHex;
 };
@@ -49,11 +50,7 @@ function arrayBufferToHex(arrayBuffer?: ArrayBuffer | null) {
   return result;
 }
 
-/* deployHook function turns the wasm binary into
+export const prepareDeployHookTx = async (
- * hex string, signs the transaction and deploys it to
- * Hooks testnet.
- */
-export const deployHook = async (
   account: IAccount & { name?: string },
   data: SetHookData
 ) => {
@@ -72,12 +69,12 @@ export const deployHook = async (
     return;
   }
   const HookNamespace = (await sha256(data.HookNamespace)).toUpperCase();
-  const hookOnValues: (keyof TTS)[] = data.Invoke.map(tt => tt.value);
+  const hookOnValues: (keyof TTS)[] = data.Invoke.map((tt) => tt.value);
   const { HookParameters } = data;
   const filteredHookParameters = HookParameters.filter(
-    hp =>
+    (hp) =>
       hp.HookParameter.HookParameterName && hp.HookParameter.HookParameterValue
-  )?.map(aa => ({
+  )?.map((aa) => ({
     HookParameter: {
       HookParameterName: toHex(aa.HookParameter.HookParameterName || ""),
       HookParameterValue: aa.HookParameter.HookParameterValue || "",
@@ -92,13 +89,12 @@ export const deployHook = async (
   //     }
   //   }
   // });
-
   if (typeof window !== "undefined") {
     const tx = {
       Account: account.address,
       TransactionType: "SetHook",
       Sequence: account.sequence,
-      Fee: "100000",
+      Fee: data.Fee,
       Hooks: [
         {
           Hook: {
@@ -117,18 +113,39 @@ export const deployHook = async (
         },
       ],
     };
+    return tx;
+  }
+};
 
+/* deployHook function turns the wasm binary into
+ * hex string, signs the transaction and deploys it to
+ * Hooks testnet.
+ */
+export const deployHook = async (
+  account: IAccount & { name?: string },
+  data: SetHookData
+) => {
+  if (typeof window !== "undefined") {
+    const tx = await prepareDeployHookTx(account, data);
+    if (!tx) {
+      return;
+    }
+    if (!state.client) {
+      return;
+    }
     const keypair = derive.familySeed(account.secret);
+
     const { signedTransaction } = sign(tx, keypair);
     const currentAccount = state.accounts.find(
-      acc => acc.address === account.address
+      (acc) => acc.address === account.address
     );
     if (currentAccount) {
       currentAccount.isLoading = true;
     }
     let submitRes;
+
     try {
-      submitRes = await state.client.send({
+      submitRes = await state.client?.send({
         command: "submit",
         tx_blob: signedTransaction,
       });
@@ -143,14 +160,14 @@ export const deployHook = async (
           message: ref(
             <>
               [{submitRes.engine_result}] {submitRes.engine_result_message}{" "}
-              Validated ledger index:{" "}
+              Transaction hash:{" "}
               <Link
                 as="a"
-                href={`https://${process.env.NEXT_PUBLIC_EXPLORER_URL}/${submitRes.validated_ledger_index}`}
+                href={`https://${process.env.NEXT_PUBLIC_EXPLORER_URL}/${submitRes.tx_json?.hash}`}
                 target="_blank"
                 rel="noopener noreferrer"
               >
-                {submitRes.validated_ledger_index}
+                {submitRes.tx_json?.hash}
               </Link>
             </>
           ),
@@ -183,7 +200,7 @@ export const deleteHook = async (account: IAccount & { name?: string }) => {
     return;
   }
   const currentAccount = state.accounts.find(
-    acc => acc.address === account.address
+    (acc) => acc.address === account.address
   );
   if (currentAccount?.isLoading || !currentAccount?.hooks.length) {
     return;
@@ -205,6 +222,14 @@ export const deleteHook = async (account: IAccount & { name?: string }) => {
     };
 
     const keypair = derive.familySeed(account.secret);
+    try {
+      // Update tx Fee value with network estimation
+      const res = await estimateFee(tx, account);
+      tx["Fee"] = res?.base_fee ? res?.base_fee : "1000";
+    } catch (err) {
+      // use default value what you defined earlier
+      console.log(err);
+    }
     const { signedTransaction } = sign(tx, keypair);
 
     if (currentAccount) {

state/actions/fetchFiles.ts

@@ -58,6 +58,29 @@ export const fetchFiles = (gistId: string) => {
             language: res.data.files?.[filename]?.language?.toLowerCase() || "",
             content: res.data.files?.[filename]?.content || "",
           }));
+          // Sort files so that the source files are first
+          // In case of other files leave the order as it its
+          files.sort((a, b) => {
+            const aBasename = a.name.split('.')?.[0];
+            const aCext = a.name?.toLowerCase().endsWith('.c');
+            const bBasename = b.name.split('.')?.[0];
+            const bCext = b.name?.toLowerCase().endsWith('.c');
+            // If a has c extension and b doesn't move a up
+            if (aCext && !bCext) {
+              return -1;
+            }
+            if (!aCext && bCext) {
+              return 1
+            }
+            // Otherwise fallback to default sorting based on basename
+            if (aBasename > bBasename) {
+              return 1;
+            }
+            if (bBasename > aBasename) {
+              return -1;
+            }
+            return 0;
+          })
           state.loading = false;
           if (files.length > 0) {
             state.logs.push({

state/actions/sendTransaction.ts

@@ -20,14 +20,11 @@ export const sendTransaction = async (account: IAccount, txOptions: TransactionO
     const { Fee = "1000", ...opts } = txOptions
     const tx: TransactionOptions = {
         Account: account.address,
-        Sequence: account.sequence, // TODO auto-fillable
+        Sequence: account.sequence,
-        Fee,  // TODO auto-fillable
+        Fee,  // TODO auto-fillable default
         ...opts
     };
-    const currAcc = state.accounts.find(acc => acc.address === account.address);
+
-    if (currAcc) {
-        currAcc.sequence = account.sequence + 1;
-    }
     const { logPrefix = '' } = options || {}
     try {
         const signedAccount = derive.familySeed(account.secret);
@@ -47,6 +44,10 @@ export const sendTransaction = async (account: IAccount, txOptions: TransactionO
                 message: `${logPrefix}[${response.error || response.engine_result}] ${response.error_exception || response.engine_result_message}`,
             });
         }
+        const currAcc = state.accounts.find(acc => acc.address === account.address);
+        if (currAcc && response.account_sequence_next) {
+            currAcc.sequence = response.account_sequence_next;
+        }
     } catch (err) {
         console.error(err);
         state.transactionLogs.push({

state/index.ts

@@ -113,7 +113,7 @@ let initialState: IState = {
   accounts: [],
   compileOptions: {
     optimizationLevel: '-O0',
-    strip: false
+    strip: true
   }
 };
 

state/transactions.ts

@@ -19,7 +19,8 @@ export interface TransactionState {
     txFields: TxFields;
     viewType: 'json' | 'ui',
     editorSavedValue: null | string,
-    editorValue?: string
+    editorValue?: string,
+    estimatedFee?: string
 }
 
 
@@ -93,7 +94,7 @@ export const modifyTransaction = (
     Object.keys(partialTx).forEach(k => {
         // Typescript mess here, but is definetly safe!
         const s = tx.state as any;
-        const p = partialTx as any;
+        const p = partialTx as any; // ? Make copy
         if (!deepEqual(s[k], p[k])) s[k] = p[k];
     });
 
@@ -140,7 +141,7 @@ export const prepareTransaction = (data: any) => {
 }
 
 // editor value to state
-export const prepareState = (value: string, txState: TransactionState) => {
+export const prepareState = (value: string, transactionType?: string) => {
     const options = parseJSON(value);
     if (!options) {
         showAlert("Error!", {
@@ -151,7 +152,7 @@ export const prepareState = (value: string, txState: TransactionState) => {
 
     const { Account, TransactionType, Destination, ...rest } = options;
     let tx: Partial<TransactionState> = {};
-    const { txFields } = txState
+    const txFields = getTxFields(transactionType)
 
     if (Account) {
         const acc = state.accounts.find(acc => acc.address === Account);
@@ -206,7 +207,7 @@ export const prepareState = (value: string, txState: TransactionState) => {
         if (isXrp) {
             rest[field] = {
                 $type: "xrp",
-                $value: +value / 1000000, // TODO maybe use bigint?
+                $value: +value / 1000000, // ! maybe use bigint?
             };
         } else if (typeof value === "object") {
             rest[field] = {
@@ -222,4 +223,24 @@ export const prepareState = (value: string, txState: TransactionState) => {
     return tx
 }
 
+export const getTxFields = (tt?: string) => {
+    const txFields: TxFields | undefined = transactionsData.find(
+        tx => tx.TransactionType === tt
+    );
+
+    if (!txFields) return {}
+
+    let _txFields = Object.keys(txFields)
+        .filter(
+            key => !["TransactionType", "Account", "Sequence"].includes(key)
+        )
+        .reduce<TxFields>(
+            (tf, key) => (
+                (tf[key as keyof TxFields] = (txFields as any)[key]), tf
+            ),
+            {}
+        );
+    return _txFields
+}
+
 export { transactionsData }

utils/estimateFee.ts

@@ -0,0 +1,30 @@
+import toast from 'react-hot-toast';
+import { derive, sign } from "xrpl-accountlib"
+import state, { IAccount } from "../state"
+
+const estimateFee = async (tx: Record<string, unknown>, account: IAccount, opts: { silent?: boolean } = {}): Promise<null | { base_fee: string, median_fee: string; minimum_fee: string; open_ledger_fee: string; }> => {
+  try {
+    const copyTx = JSON.parse(JSON.stringify(tx))
+    delete copyTx['SigningPubKey']
+    if (!copyTx.Fee) {
+      copyTx.Fee = '1000'
+    }
+    
+    const keypair = derive.familySeed(account.secret)
+    const { signedTransaction } = sign(copyTx, keypair);
+
+    const res = await state.client?.send({ command: 'fee', tx_blob: signedTransaction })
+    if (res && res.drops) {
+      return res.drops;
+    }
+    return null
+  } catch (err) {
+    if (!opts.silent) {
+      console.error(err)
+      toast.error("Cannot estimate fee.") // ? Some better msg
+    }
+    return null
+  }
+}
+
+export default estimateFee

xrpl-hooks-docs/docs.ts

@@ -41,6 +41,7 @@ import hooksSkipHashBufLen from "./md/hooks-skip-hash-buf-len.md";
 import hooksStateBufLen from "./md/hooks-state-buf-len.md";
 import hooksTransactionHashBufLen from "./md/hooks-transaction-hash-buf-len.md";
 import hooksTransactionSlotLimit from "./md/hooks-transaction-slot-limit.md";
+import hooksTrivialCbak from "./md/hooks-trivial-cbak.md";
 import hooksValidateBufLen from "./md/hooks-validate-buf-len.md";
 import hooksVerifyBufLen from "./md/hooks-verify-buf-len.md";
 
@@ -90,6 +91,7 @@ const docs: { [key: string]: string; } = {
   "hooks-state-buf-len": hooksStateBufLen,
   "hooks-transaction-hash-buf-len": hooksTransactionHashBufLen,
   "hooks-transaction-slot-limit": hooksTransactionSlotLimit,
+  "hooks-trivial-cbak": hooksTrivialCbak,
   "hooks-validate-buf-len": hooksValidateBufLen,
   "hooks-verify-buf-len": hooksVerifyBufLen,
 };

xrpl-hooks-docs/md/hooks-entry-points.md

@@ -1,7 +1,7 @@
 # hooks-entry-points
 
-A Hook always implements and exports exactly two functions: [cbak](https://xrpl-hooks.readme.io/v2.0/reference/cbak) and [hook](https://xrpl-hooks.readme.io/v2.0/reference/hook).
+A Hook always implements and exports a [hook](https://xrpl-hooks.readme.io/v2.0/reference/hook) function.
 
-This check shows error on translation units that do not have them.
+This check shows error on translation units that do not have it.
 
 [Read more](https://xrpl-hooks.readme.io/v2.0/docs/compiling-hooks)

xrpl-hooks-docs/md/hooks-hash-buf-len.md

@@ -1,5 +1,5 @@
 # hooks-hash-buf-len
 
-Functions [util_sha512h](https://xrpl-hooks.readme.io/v2.0/reference/util_sha512h), [hook_hash](https://xrpl-hooks.readme.io/v2.0/reference/hook_hash), [ledger_last_hash](https://xrpl-hooks.readme.io/v2.0/reference/ledger_last_hash) and [nonce](https://xrpl-hooks.readme.io/v2.0/reference/nonce) have fixed-size hash output.
+Functions [util_sha512h](https://xrpl-hooks.readme.io/v2.0/reference/util_sha512h), [hook_hash](https://xrpl-hooks.readme.io/v2.0/reference/hook_hash), [ledger_last_hash](https://xrpl-hooks.readme.io/v2.0/reference/ledger_last_hash), [etxn_nonce](https://xrpl-hooks.readme.io/v2.0/reference/etxn_nonce) and [ledger_nonce](https://xrpl-hooks.readme.io/v2.0/reference/ledger_nonce) have fixed-size hash output.
 
 This check warns about too-small size of their output buffer (if it's specified by a constant - variable parameter is ignored).

xrpl-hooks-docs/md/hooks-trivial-cbak.md

@@ -0,0 +1,7 @@
+# hooks-trivial-cbak
+
+A Hook may implement and export a [cbak](https://xrpl-hooks.readme.io/v2.0/reference/cbak) function.
+
+But the function is optional, and defining it so that it doesn't do anything besides returning a constant value is unnecessary (except for some debugging scenarios) and just increases the hook size. This check warns about such implementations.
+
+[Read more](https://xrpl-hooks.readme.io/v2.0/docs/compiling-hooks)